Manual de Mantenimiento CAT 950G

®© 2010 CaterpillarAll Rights Reserved

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MAINTENANCE INTERVALSOperation and Maintenance Manual Excerpt

SEBU7018-08September 2006

Operation andMaintenanceManualIT62G Integrated Toolcarrier and 950Gand 962G Wheel LoadersAKP1-Up (Machine)BDP1-Up (Machine)2JS1-Up (Machine)3BS1-Up (Machine)4BS1-Up (Machine)5AS1-Up (Machine)5RS1-Up (Machine)6NS1-Up (Machine)6PS1-Up (Machine)3JW1-Up (Machine)4PW1-Up (Machine)5FW1-Up (Machine)5MW1-Up (Machine)6EW1-Up (Machine)6HW1-Up (Machine)7BW1-Up (Machine)8JW1-Up (Machine)

102 SEBU7018-08Maintenance SectionMaintenance Interval Schedule

i02625049

Maintenance Interval ScheduleSMCS Code: 7000

Ensure that all safety information, warnings, andinstructions are read and understood before anyoperation or any maintenance procedures areperformed.

The user is responsible for the performance ofmaintenance, including all adjustments, the use ofproper lubricants, fluids, filters, and the replacementof components due to normal wear and aging. Failureto adhere to proper maintenance intervals andprocedures may result in diminished performance ofthe product and/or accelerated wear of components.

Use mileage, fuel consumption, service hours, orcalendar time, WHICH EVER OCCURS FIRST,in order to determine the maintenance intervals.Products that operate in severe operating conditionsmay require more frequent maintenance.

Note: Before each consecutive interval is performed,all maintenance from the previous interval must beperformed.

When Required

Battery - Recycle ................................................ 105Battery or Battery Cable - Inspect/Replace ........ 105Bucket Wear Plates - Inspect/Replace ................ 115Circuit Breakers - Reset ....................................... 116Engine Air Filter Primary Element -Clean/Replace .................................................. 125Engine Air Filter Secondary Element - Replace .. 127Ether Starting Aid Cylinder - Replace ................. 135Fuel System - Prime ........................................... 135Fuses - Replace .................................................. 141Hydraulic System Biodegradable Oil Filter Element -Replace ............................................................. 143Oil Filter - Inspect ................................................ 149Radiator Core - Clean ......................................... 149Ride Control Accumulator - Check ..................... 151Window Washer Reservoir - Fill .......................... 159Window Wiper - Inspect/Replace ........................ 159

Every 10 Service Hours or Daily

Backup Alarm - Test ............................................ 104Bucket Cutting Edges - Inspect/Replace ............ 109Bucket Tips - Inspect/Replace ............................. 111Bucket Tips - Inspect/Replace ............................. 112Cooling System Coolant Level - Check ............... 119Engine Air Filter Service Indicator - Inspect ........ 127Engine Air Precleaner - Clean ............................ 128Engine Oil Level - Check .................................... 130Fuel System Primary Filter (Water Separator) -Drain ................................................................. 136Hydraulic System Oil Level - Check ................... 147

Seat Belt - Inspect .............................................. 152Transmission Oil Level - Check .......................... 158Windows - Clean ................................................. 160

Every 50 Service Hours or Weekly

Bucket Lower Pivot Bearings - Lubricate ............. 110Cab Air Filter - Clean/Replace ............................. 115Fuel Tank Water and Sediment - Drain ............... 141Hydraulic System Biodegradable Oil Filter Restriction- Check .............................................................. 143Tire Inflation - Check ........................................... 155

Every 100 Service Hours or 2 Weeks

Axle Oscillation Bearings - Lubricate .................. 104Bucket Linkage and Loader Cylinder Bearings -Lubricate ........................................................... 109Bucket Upper Pivot Bearings - Lubricate ............. 115Logging Fork Clamp - Lubricate ......................... 148Steering Cylinder Bearings - Lubricate ............... 153

Every 250 Service Hours

Engine Oil Sample - Obtain ................................ 131

Every 250 Service Hours or Monthly

Battery - Clean .................................................... 105Belts - Inspect/Adjust/Replace ............................ 106Brake Accumulator - Check ................................ 108Braking System - Test ......................................... 109Differential and Final Drive Oil Level - Check ..... 123Drive Shaft Spline (Center) - Lubricate ............... 124Engine Air Filter Service Indicator -Inspect/Replace ................................................ 128Engine Oil and Filter - Change ........................... 131

Initial 500 Hours (for New Systems, RefilledSystems, and Converted Systems)

Cooling System Coolant Sample (Level 2) -Obtain ............................................................... 120Refrigerant Dryer - Replace ................................ 151

Every 500 Service Hours

Cooling System Coolant Sample (Level 1) -Obtain ............................................................... 120Hydraulic System Oil Sample - Obtain ............... 147Transmission Oil Sample - Obtain ...................... 159

Every 500 Service Hours or 3 Months

Differential and Final Drive Oil Sample - Obtain .. 123Engine Crankcase Breather - Clean ................... 129Fuel System Primary Filter (Water Separator)Element - Replace ............................................ 137Fuel System Secondary Filter Number One -Replace ............................................................. 138Fuel Tank Cap and Strainer - Clean ................... 140Hydraulic System Oil Filter - Replace ................. 146Transmission Oil Filter - Replace ........................ 157

SEBU7018-08 103Maintenance Section

Maintenance Interval Schedule

Every 1000 Service Hours or 6 Months

Articulation Bearings - Lubricate ......................... 104Battery Hold-Down - Tighten ............................... 105Drive Shaft Support Bearing - Lubricate ............. 124Drive Shaft Universal Joints - Lubricate .............. 125Fuel System Secondary Filter Number Two -Replace ............................................................. 139Roading Fender Hinges - Lubricate .................... 152Rollover Protective Structure (ROPS) - Inspect .. 152Steering Pilot Oil Screen (Command ControlSteering) - Clean/Replace ................................. 154Transmission Oil - Change ................................. 156

Every 2000 Service Hours or 1 Year

Brake Discs - Check ........................................... 108Differential and Final Drive Oil - Change ............ 121Engine Governor Oil Supply Screen -Clean/Inspect/Replace ...................................... 130Engine Valve Lash - Check ................................. 134Fuel Injection Timing - Check ............................. 135Hood Tilt Actuator - Lubricate ............................. 142Hydraulic System Oil - Change ........................... 144Hydraulic Tank Breaker Relief Valve - Clean ...... 148Service Brake Disc Wear Indicator - Check ........ 153Steering Shaft (Command Control Steering) -Lubricate ........................................................... 155

Every Year

Cooling System Coolant Sample (Level 2) -Obtain ............................................................... 120Refrigerant Dryer - Replace ................................ 151

Every 3000 Service Hours or 2 Years

Engine Auxiliary Air Filter - Replace ................... 129

Every 3 Years After Date of Installation orEvery 5 Years After Date of Manufacture

Seat Belt - Replace ............................................. 153


Cooling System Coolant Extender (ELC) - Add ... 118


Cooling System Water Temperature Regulator -Replace ............................................................. 121

Every 12 000 Service Hours or 6 Years

Cooling System Coolant (ELC) - Change ............ 116

104 SEBU7018-08Maintenance SectionArticulation Bearings - Lubricate

i02405939

Articulation Bearings -LubricateSMCS Code: 7057-086-BD; 7065-086-BD;7066-086-BD

Crushing Hazard. Insure that the machine ignitionswitch is in the OFF position and that the parkingbrake is engaged before entering the articulationarea. Failure to do so could result in serious injuryor death.

Wipe all fittings before applying grease.

g00879717Illustration 140

Apply grease to one fitting on the upper pivot bearingand one fitting on the lower pivot bearing.

i02405757

Axle Oscillation Bearings -LubricateSMCS Code: 3268-086-BD; 3278-086-BD


Wipe off all fittings before you apply any lubricant.


Open the access door on the right side of themachine.

Apply lubricant through two remote fittings (1) and (2).

i01897507

Backup Alarm - Test(If Equipped)SMCS Code: 7406-081

Turn the engine start switch to the ON position inorder to perform the test.

Apply the service brake. Place the transmission intoREVERSE.

The backup alarm should sound immediately.The backup alarm will continue to sound untilthe transmission is placed into NEUTRAL or intoFORWARD.



Battery - Clean

A three-position switch on the backup alarm regulatesthe volume of the alarm.

The backup alarm is set for the highest sound levelwhen the machine is shipped from the factory. Thesetting should remain on HIGH unless the job siterequires a lower sound level.

i01897517

Battery - CleanSMCS Code: 1401-070


Open the battery compartment on the left rear side ofthe machine. Remove the battery hold-down.

Clean the battery terminals and the surfaces ofthe batteries with a clean cloth. Coat the batteryterminals with petroleum jelly. Make sure that thebattery cables are installed securely.

Replace the battery hold-down. Refer to Operationand Maintenance Manual, “Battery Hold-Down -Tighten” for the correct torque. Close the batterycompartment.

i00993589

Battery - RecycleSMCS Code: 1401-561

Always recycle a battery. Never discard a battery.

Always return used batteries to one of the followinglocations:

• A battery supplier

• An authorized battery collection facility

• Recycling facility

i01897534

Battery Hold-Down - TightenSMCS Code: 7257-527


Open the battery compartment on the left rear sideof the machine.

Over time, the vibration of an operating machine cancause the battery hold-down to loosen. To help toprevent loose batteries and the possibility of loosecable connections, tighten the locknut in the center ofthe hold-down to a torque of 14 ± 3 N·m (10 ± 2 lb ft).

i02517652

Battery or Battery Cable -Inspect/ReplaceSMCS Code: 1401-040; 1401-510; 1402-040;1402-510

Personal injury may occur from failure to properlyservice the batteries.

Batteries give off flammable fumes that can ex-plode. Electrolyte is an acid and can cause per-sonal injury if it contacts the skin or eyes.

Prevent sparks near the batteries. Sparks couldcause vapors to explode. Do not allow jumper ca-ble ends to contact each other or the engine. Im-proper jumper cable connections can cause an ex-plosion.

Always wear protective glasses when workingwith batteries.

1. Turn the engine start switch key OFF. Turn all ofthe switches OFF.

106 SEBU7018-08Maintenance SectionBelts - Inspect/Adjust/Replace

2. Turn the battery disconnect switch OFF. Removethe key.

3. Disconnect the negative battery cable from thedisconnect switch.

Note: Do not allow the disconnected battery cable tocontact the disconnect switch.

4. Disconnect the negative battery cable at thebattery.

5. Disconnect the positive battery cable at thebattery.

6. Inspect the battery terminals for corrosion. Inspectthe battery cables for wear or damage.

7. Make any necessary repairs. If necessary, replacethe battery cables or the battery.

8. Connect the positive battery cable at the battery.

9. Connect the negative battery cable at the battery.

10.Connect the battery cable at the batterydisconnect switch.

11. Install the key and turn the battery disconnectswitch ON.

i01908348

Belts - Inspect/Adjust/ReplaceSMCS Code: 1357-025; 1357-040; 1357-510

Note: Stop the engine before you perform any of thefollowing procedures.

Alternator Belt1. Access the alternator from the left side of themachine.

2. Inspect the condition of the alternator belt. If thebelt is cracked or frayed, replace the belt.

3. Use a BT-33-97 Borroughs Gauge to check thetension of the alternator belt.

The tension of a used belt with more than 30minutes of operation at rated speed should be400 ± 44 N (90 ± 10 lb). The tension of a new beltwith 30 minutes of operation or less at rated speedshould be 534 ± 22 N (120 ± 5 lb).

Adjusting the Tension of the AlternatorBelt


1. Loosen one mounting bolt (4) and adjustment bolt(2).

2. Insert a ratchet with a square drive into the hole inmounting bracket (1). Use the ratchet as a lever torotate alternator (3). Rotate the alternator until thecorrect belt tension is reached.

3. Tighten adjustment bolt (2) and mounting bolt (4).

4. Recheck the tension of belt (5). If the tension of thebelt is incorrect, repeat the adjustment procedure.

Air Conditioner Belt1. Access the compressor from the right side of themachine.

2. Inspect the condition of the air conditioner belt. Ifthe belt is cracked or frayed, replace the belt.

3. Use a BT-33-97 Borroughs Gauge to check thetension of the air conditioner belt.

Earlier Machines (1W-9693 V-Belt)


Later Machines (1P-4334 V-Belt)

The tension of a used belt with more than 30minutes of operation at rated speed should be445 ± 44 N (100 ± 10 lb). The tension of a newbelt with 30 minutes of operation or less at ratedspeed should be 712 ± 22 N (160 ± 5 lb).


Belts - Inspect/Adjust/Replace

Adjusting the Tension of the AirConditioner Belt


1. Loosen one mounting bolt (10) and adjustmentbolt (6).

2. Insert a ratchet with a square drive into the hole inmounting bracket (7). Use the ratchet as a leverto rotate compressor (8). Rotate the compressoruntil the correct belt tension is reached.

3. Tighten adjustment bolt (6) and mounting bolt (10).

4. Recheck the tension of belt (9). If the tension of thebelt is incorrect, repeat the adjustment procedure.

Water Pump Drive Belt1. Open the engine hood in order to access thewater pump drive belt.

2. Inspect the condition of the water pump drive belt.If the belt is cracked or frayed, replace the belt.

3. Use a BT-33-97 Borroughs Gauge to check thetension of the water pump drive belt.


Adjusting the Tension of the Water PumpDrive Belt



2. Insert a ratchet with a square drive into the hole inmounting bracket (15). Use the ratchet as a leverto rotate water pump (11). Rotate the water pumpuntil the correct belt tension is reached.

3. Tighten adjustment bolt (12) and mounting bolt(14).

4. Recheck the tension of belt (13). If the tensionof the belt is incorrect, repeat the adjustmentprocedure.

Belt for the Axle Oil Cooler Pump(If Equipped)1. Open the engine hood in order to access the axleoil cooler pump.

2. Inspect the condition of the belt. If the belt iscracked or frayed, replace the belt.

3. Use a BT-33-97 Borroughs Gauge to check thetension of the belt.


108 SEBU7018-08Maintenance SectionBrake Accumulator - Check

Adjusting the Tension of the Belt for theAxle Oil Cooler Pump



2. Insert a ratchet with a square drive into the hole inmounting bracket (19). Use the ratchet as a leverto rotate axle oil cooler pump (20). Rotate theaxle oil cooler pump until the correct belt tensionis reached.

3. Tighten adjustment bolt (18) and mounting bolt(17).

4. Recheck the tension of belt (16). If the tensionof the belt is incorrect, repeat the adjustmentprocedure.

i01714079

Brake Accumulator - CheckSMCS Code: 4263-535


1. Turn the engine start switch to the ON position.The alert indicator for brake oil pressure shouldcome on if the braking system is not at normaloperating pressure.

2. Start the engine. Run the engine at half speed fortwo minutes in order to increase the accumulatorpressure. The alert indicator for brake oil pressureshould go off.

3. Stop the engine. Apply the service brake pedaland release the service brake pedal until the alertindicator for brake oil pressure comes on. This willdecrease the accumulator pressure. A minimumof five applications of the service brake pedal arerequired.

4. If the alert indicator comes on after less thanfive applications of the brake, measure theaccumulator precharge pressure. An authorizedCaterpillar dealer can measure the nitrogen gaspressure in the accumulator. Use only dry nitrogengas for recharging.

i01732078

Brake Discs - CheckSMCS Code: 4255-535

Reference: For the correct procedure, refer to theTesting and Adjusting Service Manual of the brakingsystem for your machine or consult your Caterpillardealer.

SEBU7018-08 109Maintenance SectionBraking System - Test

i02056278

Braking System - TestSMCS Code: 4251-081; 4267-081

In order to test the braking system, refer to theTestingand Adjusting Service Manual of the braking systemfor your machine or consult your Caterpillar dealer.

i02196469

Bucket Cutting Edges -Inspect/ReplaceSMCS Code: 6801-040; 6801-510

Personal injury or death can result from bucketfalling.

Block the bucket before changing bucket cuttingedges.


Check the cutting edges and the end bits for wearand for damage. Use the following procedure toservice the cutting edges and the end bits:

1. Raise the bucket and place blocking under thebucket.

2. Lower the bucket onto the blocking. Stop theengine.

3. Remove bolts (1), cutting edge (2) and the endbits.

4. Clean all contact surfaces.

5. If the opposite side of the cutting edge is not worn,use the opposite side of the cutting edge. The endbits are not reversible.

If both sides are worn, install a new cutting edge.

6. Install bolts (1). Tighten the bolts to the specifiedtorque.

Reference: Refer to Specifications, SENR3130,“Ground Engaging Tool (G.E.T.) Fasteners”.

7. Start the engine. Raise the bucket and remove theblocking. Lower the bucket to the ground.

8. After a few hours of operation, check the bolts forproper torque.

i01897623

Bucket Linkage and LoaderCylinder Bearings - LubricateSMCS Code: 5102-086-BD; 5104-086-BD;6107-086-BD

Integrated ToolcarrierWipe off all of the fittings before you apply anylubricant.


Apply lubricant through twelve fittings on each sideof the machine.

There are a total of 24 fittings.

Wheel LoaderWipe off all fittings before any lubricant is applied.

110 SEBU7018-08Maintenance SectionBucket Lower Pivot Bearings - Lubricate


Apply lubricant through fittings (2) and (3) on bothlift cylinders. Apply lubricant through fittings (5), (6)and (7).


For pin joint (1), apply lubricant through one remotefitting on each side of the machine.


For pin joint (4), apply lubricant through a remotefitting on the right side of the machine. Use the fittingthat is toward the front of the machine.

i01897748

Bucket Lower Pivot Bearings- LubricateSMCS Code: 6101-086-BD; 6107-086-BD

S/N: BDP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up

S/N: 3JW1-Up

S/N: 4PW1-Up

S/N: 5FW1-Up

S/N: 5MW1-Up

S/N: 6EW1-Up

S/N: 6HW1-Up

S/N: 7BW1-Up

S/N: 8JW1-Up


Wipe off all fittings before any lubricant is applied.

Apply lubricant through one fitting on each side ofthe machine.


Bucket Tips - Inspect/Replace

i02420559

Bucket Tips - Inspect/ReplaceSMCS Code: 6805-040; 6805-510

S/N: BDP1-Up

S/N: 2JS1-Up

Personal injury or death can result from the bucketfalling.

Block the bucket before changing bucket tips.

Bucket Tips

g00101352Illustration 156(1) Usable(2) Replace(3) Replace

Check the bucket tips for wear. If the bucket tip has ahole, replace the bucket tip.

1. Remove the pin from the bucket tip. The pin canbe removed by one of the following methods.

• Use a hammer and a punch from the retainerside of the bucket to drive out the pin.

• Use a Pin-Master. Follow Step 1.a through Step1.c for the procedure.

g00590670Illustration 157(4) Back of Pin-Master(5) Extractor

a. Place the Pin-Master on the bucket tooth.

b. Align extractor (5) with the pin.

c. Strike the Pin-Master at the back of the tool(4) and remove the pin.


(6) Retainer(7) Retaining washer(8) Adapter

2. Clean the adapter and the pin.

3. Fit retainer (6) into retaining washer (7). Installthis assembly into the groove that is in the sideof adapter (8).

112 SEBU7018-08Maintenance SectionBucket Tips - Inspect/Replace


4. Install the new bucket tip onto the adapter.

Note: The bucket tip can be rotated by 180 degrees inorder to allow greater penetration or less penetration.

5. Drive the pin through the bucket tip. The pin canbe installed by using one of the following methods:

• From the other side of the retainer, drive thepin through the bucket tip, the adapter, and theretainer.

• Use a Pin-Master. Follow Step 5.a through Step5.e for the procedure.

Note: To correctly install the pin into the retainer, thepin must be driven in from the right side of the tooth.Improper installation of the pin can result in the lossof the bucket tip.

g00590666Illustration 160(4) Back of Pin-Master(9) Pin setter(10) Pin holder

a. Insert the pin through the bucket tooth.

b. Place the Pin-Master over the bucket tooth andlocate the pin in the hole of holder (10).

c. Strike the tool with a hammer at the back of thetool (4) in order to start the pin.

d. Slide pin holder (10) away from the pin androtate the tool slightly in order to align pin setter(9) with the pin.

e. Strike the end of the tool until the pin is fullyinserted.

6. After you drive the pin, make sure that the retainerfits snugly into the pin groove.

i02421156

Bucket Tips - Inspect/ReplaceSMCS Code: 6805-040; 6805-510

S/N: AKP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up

S/N: 3JW1-Up

S/N: 4PW1-Up

S/N: 5FW1-Up

S/N: 5MW1-Up

S/N: 6EW1-Up

S/N: 6HW1-Up

S/N: 7BW1-Up

S/N: 8JW1-Up


Block the bucket before changing bucket tips.


Bucket Tips - Inspect/Replace

Personal injury can result fromdriving out retainerpins.

Retainer pins, when struck with force can fly outand cause injury to nearby people.

Make sure the area is clear of people when drivingout retainer pins.

Wear protective glasses when striking a retainerpin.

Bucket Tips

g00101352Illustration 161(1) Usable(2) Replace this bucket tip.(3) Overworn

Check the bucket tips for wear. If the bucket tip has ahole, replace the bucket tip.

The loss of bucket tips can often be attributed tothe improper installation of the retaining pin intothe tip and the adapter. Bucket tips are lost morefrequently on excavators because the tips are closertogether. Inserting the pin from the correct side (rightside) of the adapter is difficult due to the small gap.More clearance can be obtained by installing thepin through the tip and the adapter from the leftside, and then by driving the pin against the retainer.This procedure will often cause the spiral retainer tobecome distorted, resulting in either a loss of retainergrip or an increased difficulty in removing the pin.

g01201331Illustration 162Improper installation

By driving from the right side of the adapter, theretainer is properly supported by the counterbore ofthe adapter. This procedure will show that the pinchamfer is centered in the inside diameter of theretainer more clearly.


Proper installationInstall pin from the right side.

1. Remove the pin from the bucket tip. The pin canbe removed by one of the following methods:

• Use a hammer and a punch from the retainerside of the bucket to drive out the pin.

• Use a Pin-Master. Follow Step 1.a through Step1.c for the procedure.

a. Place the Pin-Master on the bucket tooth.

b. Align extractor (5) with the pin.

c. Strike the Pin-Master at the back of the tool(4) and remove the pin.

114 SEBU7018-08Maintenance SectionBucket Tips - Inspect/Replace

g00590819Illustration 164(6) Retainer(7) Retaining Washer(8) Adapter

2. Clean the adapter and the pin.

3. Fit retainer (6) into retaining washer (7). Install thisassembly into the groove that is in the side of theadapter (8).


4. Install the new bucket tip into the adapter.

Note: The bucket tip can be rotated by 180 degrees inorder to allow greater penetration or less penetration.

5. Drive the pin through the bucket tip. The pin canbe installed by using one of the following methods:

• From the other side of the retainer, drive the pinthrough the following components: the buckettip, the adapter, and the retainer.

• Use a Pin-Master. Follow Step 5.a through Step5.e for the procedure.

g00590666Illustration 166(4) Back of Pin-Master(9) Pin setter(10) Pin holder

a. Insert the pin through the bucket tooth.

b. Place the Pin-Master over the bucket tooth andlocate the pin in the hole of the holder (10).

c. Strike the tool with a hammer at the back of thetool (4) in order to start the pin.

d. Slide pin holder (10) away from the pin androtate the tool slightly in order to align pin setter(9) with the pin.

e. Strike the end of the tool until the pin is fullyinserted.

6. After you drive the pin, make sure that the retainerfits snugly into the pin groove.

The tools that are available for driving the pins areshown in Table 13.

Table 13

Size of the Tip Pin Remover

J200, J225 143-2459

J250, J300, J350 143-2460

J350, J400, J460 196-1331

J550 203-4290


Bucket Upper Pivot Bearings - Lubricate

i01897750

Bucket Upper Pivot Bearings- LubricateSMCS Code: 6101-086-BD; 6107-086-BD

S/N: BDP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up

S/N: 3JW1-Up

S/N: 4PW1-Up

S/N: 5FW1-Up

S/N: 5MW1-Up

S/N: 6EW1-Up

S/N: 6HW1-Up

S/N: 7BW1-Up

S/N: 8JW1-Up


Wipe off the fitting before any lubricant is applied.

Apply lubricant through the fitting.

i01897951

Bucket Wear Plates -Inspect/ReplaceSMCS Code: 6120-040; 6120-510


Block the bucket before changing bucket wearplates.


Inspect the wear plates. Replace the wear platesbefore damage to the bottom of the bucket occurs.Consult your Caterpillar dealer for replacement ofwear plates.

i01908538

Cab Air Filter - Clean/ReplaceSMCS Code: 7342-070; 7342-510

Note: Clean the cab air filters more often if themachine is being operated in dusty conditions.


116 SEBU7018-08Maintenance SectionCircuit Breakers - Reset

1. Remove the filter cover behind the seat. Removethe filter element.

2. Open the access door on the left side of the cab.Remove the filter element.

3. Clean the filter elements with pressure air orwash the filter elements in warm water with anonsudsing household detergent.

4. If water and detergent are used to clean the filterelements, rinse the filter elements in clean waterand allow the filter elements to air dry thoroughly.

Note: If either filter element is damaged, install anew filter element.

5. Install the filter elements. Install the filter coverand close the access door.

i01908608

Circuit Breakers - ResetSMCS Code: 1420-529

Circuit Breaker Reset – Push the buttonin order to reset the circuit breakers. Thebutton will stay depressed if the circuit is

working properly. Check the appropriate electricalcircuit if the button does not stay depressed.


Circuit breakers are located on the fuse panel at therear of the cab.

Fan Motor (1) – 15 amp

Seat Air Compressor (2) – 15 amp


Two circuit breakers are located on the right side ofthe engine compartment below the air cleaner.

Main Circuit (3) – 80 amp

Alternator (4) – 80 amp

i01898004

Cooling System Coolant (ELC)- ChangeSMCS Code: 1350-044-NL

Pressurized system: Hot coolant can cause seri-ous burn. To open cap, stop engine, wait until ra-diator is cool. Then loosen cap slowly to relievethe pressure.

NOTICECare must be taken to ensure that fluids are containedduring performance of inspection, maintenance, test-ing, adjusting and repair of the product. Be prepared tocollect the fluid with suitable containers before open-ing any compartment or disassembling any compo-nent containing fluids.

Refer to Special Publication, NENG2500, “CaterpillarTools and Shop Products Guide” for tools and suppliessuitable to collect and contain fluids on Caterpillarproducts.

Dispose of all fluids according to local regulations andmandates.


Cooling System Coolant (ELC) - Change

NOTICETopping off or mixing Cat ELC with other products thatdo not meet Caterpillar EC-1 specifications reducesthe effectiveness of the coolant and shortens coolantservice life.

Use only Caterpillar products or commercial productsthat have passed the Caterpillar EC-1 specification forpre-mixed or concentrate coolants. Use only Extenderwith Cat ELC.

Failure to follow these recommendations can result inshortened cooling system component life.

Reference: For information about the addition ofExtender to your cooling system, see Operationand Maintenance Manual, “Cooling System CoolantExtender (ELC) - Add” or consult your Caterpillardealer.

If an Extended Life Coolant was previously used,flush the cooling system with clean water. No othercleaning agents are required. Use the followingprocedure to change the Extended Life Coolant.


The cooling system pressure cap is located underthe hood at the rear of the machine.


1. Slowly loosen cooling system pressure cap (1) inorder to relieve system pressure.


2. Open drain valve (2) on the bottom of the radiator.Drain valve (2) can be accessed from the left sideof the machine. Allow the coolant to drain into asuitable container.

3. Flush the cooling system with clean water until thedraining water is clean. Close drain valve (2).

4. Replace the water temperature regulator at thistime.

Reference: Refer to Operation and MaintenanceManual, “Cooling System Water TemperatureRegulator - Replace”.

Reference: Refer to Disassembly and Assembly,SENR3611, “3126 Engines for Caterpillar BuiltMachines”.

5. Add the Extended Life Coolant.

Reference: Refer to Operation and MaintenanceManual, “Capacities (Refill)” for the refill capacityof the cooling system.

6. Start the engine. Run the engine without thecooling system pressure cap until the watertemperature regulator opens and the coolant levelstabilizes.

118 SEBU7018-08Maintenance SectionCooling System Coolant Extender (ELC) - Add


7. Maintain the coolant level in sight gauge (3) on theupper right side of the radiator.

8. Install pressure cap (1). Stop the engine.

i01898080

Cooling System CoolantExtender (ELC) - AddSMCS Code: 1352-544-NL





NOTICETopping off or mixing Cat ELC with other products thatdo not meet Caterpillar EC-1 specifications reducesthe effectiveness of the coolant and shortens coolantservice life.

Use only Caterpillar products or commercial productsthat have passed the Caterpillar EC-1 specification forpre-mixed or concentrate coolants. Use only Extenderwith Cat ELC.

Failure to follow these recommendations can result inshortened cooling system component life.

When a Caterpillar Extended Life Coolant (ELC) isused, an Extender must be added to the coolingsystem.

Use a 8T-5296 Coolant Test Kit to check theconcentration of the coolant.

Reference: For additional information aboutthe addition of Extender, refer to SpecialPublication, SEBU6250, “Caterpillar Machine FluidsRecommendations” or consult your Caterpillar dealer.


The cooling system pressure cap is located under theengine hood at the rear of the machine. Tilt the hoodin order to access the cooling system pressure cap.


Cooling System Coolant Level - Check


1. Slowly loosen cooling system pressure cap (1) inorder to relieve any system pressure. Remove thecooling system pressure cap.


2. If necessary, drain enough coolant from theradiator in order to allow the addition of theExtender to the cooling system. Cooling systemdrain valve (2) is located on the lower left side ofthe radiator.

3. Add 1.18 L (40 fl oz) of Extender to the coolingsystem.

4. Check the coolant level.

Reference: Refer to Operation and MaintenanceManual, “Cooling System Coolant Level - Check”for the correct procedure.

5. Install pressure cap (1). Close the engine hood.

i01898095

Cooling System Coolant Level- CheckSMCS Code: 1350-535-FLV




Open the access door on the right side of themachine. Coolant level sight gauge (1) is located onthe right front side of the radiator.

Maintain the coolant level within sight gauge(1). Addcoolant, if necessary.

Note: If it is necessary to add coolant daily, inspectthe cooling system for leaks.

120 SEBU7018-08Maintenance SectionCooling System Coolant Sample (Level 1) - Obtain

i01901890

Cooling System CoolantSample (Level 1) - ObtainSMCS Code: 1350-008; 1395-008; 7542

NOTICEDo not use the same vacuum sampling pump for ex-tracting oil samples that is used for extracting coolantsamples.

A small residue of either type sample may remain inthe pump and may cause a false positive analysis forthe sample being taken.

Always use a designated pump for oil sampling and adesignated pump for coolant sampling.

Failure to do so may cause a false analysis whichcould lead to customer and dealer concerns.

Note: Level 1 results may indicate a need forLevel 2 Analysis.


Note: The cooling system is not equipped with asampling valve. Use a vacuum pump in order toobtain a sample of the coolant. Withdraw the coolantthrough filler cap (1) on the top of the radiator.

Obtain the sample of the coolant as close as possibleto the recommended sampling interval. In orderto receive the full effect of S·O·S analysis, youmust establish a consistent trend of data. In orderto establish a pertinent history of data, performconsistent samplings that are evenly spaced.Supplies for collecting samples can be obtained fromyour Caterpillar dealer.

Use the following guidelines for proper sampling ofthe coolant:

• Complete the information on the label for thesampling bottle before you begin to take thesamples.

• Keep the unused sampling bottles stored in plasticbags.

• Obtain coolant samples directly from the coolantsample port. You should not obtain the samplesfrom any other location.

• Keep the lids on empty sampling bottles until youare ready to collect the sample.

• Place the sample in the mailing tube immediatelyafter obtaining the sample in order to avoidcontamination.

• Never collect samples from expansion bottles.

• Never collect samples from the drain for a system.

Submit the sample for Level 1 analysis.

For additional information about coolant analysis, seeSpecial Publication, SEBU6250, “Caterpillar MachineFluids Recommendations” or consult your Caterpillardealer.

i01901920

Cooling System CoolantSample (Level 2) - ObtainSMCS Code: 1350-008; 1395-008; 7542

NOTICEDo not use the same vacuum sampling pump for ex-tracting oil samples that is used for extracting coolantsamples.

A small residue of either type sample may remain inthe pump and may cause a false positive analysis forthe sample being taken.

Always use a designated pump for oil sampling and adesignated pump for coolant sampling.

Failure to do so may cause a false analysis whichcould lead to customer and dealer concerns.


Cooling System Water Temperature Regulator - Replace


Note: The cooling system is not equipped with asampling valve. Use a vacuum pump in order toobtain a sample of the coolant. Withdraw the coolantthrough filler cap (1) on the top of the radiator.

Obtain the sample of the coolant as close as possibleto the recommended sampling interval. Suppliesfor collecting samples can be obtained from yourCaterpillar dealer.

Refer to Operation and Maintenance Manual,“Cooling System Coolant Sample (Level 1) - Obtain”for the guidelines for proper sampling of the coolant.

Submit the sample for Level 2 analysis.

Reference: For additional information about coolantanalysis, refer to Special Publication, SEBU6250,“Caterpillar Machine Fluids Recommendations” orconsult your Caterpillar dealer.

i01898114

Cooling System WaterTemperature Regulator -ReplaceSMCS Code: 1355-510; 1393-010


NOTICEFailure to replace the engine’s thermostat on a regu-larly scheduled basis could cause severe engine dam-age.

NOTICECaterpillar engines incorporate a shunt design coolingsystem and require operating the engine with a ther-mostat installed.

If the thermostat is installed wrong, it will cause theengine to overheat. Inspect gaskets before assemblyand replace if worn or damaged.

Replace the water temperature regulator in orderto reduce the chance of problems with the coolingsystem.

Replace the water temperature regulator and replacethe seals while the cooling system is completelydrained or while the coolant is drained to a level thatis below the water temperature regulator housing.

Note: If you are only replacing the water temperatureregulator, drain the coolant to a level that is below thewater temperature regulator housing.

Reference: Refer to Disassembly and Assembly,SENR3611, “3126 Engines for Caterpillar BuiltMachines” for the correct procedure for replacing thewater temperature regulator.

i02441594

Differential and Final Drive Oil- ChangeSMCS Code: 3278-044; 4011-044


Refer to Special Publication, NENG2500, “CaterpillarDealer Service Tool Catalog” for tools and suppliessuitable to collect and contain fluids on Caterpillarproducts.


122 SEBU7018-08Maintenance SectionDifferential and Final Drive Oil - Change

g00989676Illustration 183Machine without axle oil cooler

g00630605Illustration 184Machine with axle oil cooler

Note: The axle housings are equipped with ecologydrain valves.

1. Remove the drain plugs. Attach a hose to asuitable drain adapter. Install a drain adapter intoeach drain valve. Allow the oil to drain into asuitable container.

2. Remove the drain adapters from the drain valves.

3. Clean the drain plugs and install the drain plugs.

g00989672Illustration 185Dipstick/fill plug for the front axle

g00989674Illustration 186Dipstick/fill plug for the rear axle

4. Wipe off the dipstick/fill plugs and the surfacesaround the dipstick/fill plugs.

5. Remove the dipstick/fill plugs. Add 0.5 L (0.5 qt) of1U-9891 Hydraulic Oil Additive to each axle. Fillthe axles with oil.

Reference: Refer to Operation and MaintenanceManual, “Lubricant Viscosities and RefillCapacities” for the type of lubricant and for therefill capacity.

6. Clean the dipstick/fill plugs and install thedipstick/fill plugs.

7. Run the machine on level ground for a fewminutes in order to equalize the oil level in theaxle. Check the oil level in the axle.

Reference: Refer to Operation and MaintenanceManual, “Differential and Final Drive Oil Level -Check” for the correct procedure.


Differential and Final Drive Oil Level - Check

i01902117

Differential and Final Drive OilLevel - CheckSMCS Code: 3278-535-FLV; 4011-535-FLV

Note: Before you measure the oil level, operate themachine for a few minutes in order to equalize theoil level.

1. Park the machine on level ground. Lower thebucket and apply slight downward pressure.Engage the parking brake. Stop the engine.



2. Remove the dipstick/fill plug. Wipe off the levelgauge with a clean cloth and reinsert the plug.This will ensure a more accurate measurementof the oil level.

Note: Make sure that the plug is installed completelybefore you check the oil level. If the plug is notinstalled completely, an incorrect oil level reading canoccur.

3. Remove the dipstick/fill plug again and check theoil level. Maintain the oil level between the ADDmark and the FULL mark. Add oil, if necessary.

Reference: Refer to Operation and MaintenanceManual, “Lubricant Viscosities and RefillCapacities” for the type of lubricant and for therefill capacity.

4. Clean the plug and install the plug.

5. Repeat Step 2 through Step 4 for the rear axle.

i01902178

Differential and Final Drive OilSample - ObtainSMCS Code: 3278-008; 4011-008; 4070-008; 7542




1. Operate the machine for a few minutes beforeobtaining the oil sample. This will thoroughly mixthe differential oil for a more accurate sample.


124 SEBU7018-08Maintenance SectionDrive Shaft Spline (Center) - Lubricate


2. The differential and final drives are not equippedwith sampling valves. Obtaining an oil sample willrequire the use of a vacuum pump or equivalentin order to extract the oil from the component.Extract the oil through the filler openings on thedifferential and final drives.

3. Complete any additional required work. Fill thedifferential and final drives with oil, as required.Install the dipstick/fill plugs.

Reference: For more information, refer to SpecialPublication, SEBU6250, “Caterpillar Machine FluidsRecommendations”, “S·O·S Oil Analysis” and SpecialPublication, PEHP6001, “How To Take A Good OilSample”.

i01462847

Drive Shaft Spline (Center) -LubricateSMCS Code: 3253-086-SN

Note: For better access to the fitting, articulate themachine to the right or to the left. Since the steeringframe lock cannot be connected in this case, removethe engine start switch key and turn the batterydisconnect switch to the OFF position.

Wipe off the fitting before you apply any lubricant.


Apply lubricant through the fitting for the center driveshaft spline.

i02407816

Drive Shaft Support Bearing -LubricateSMCS Code: 3267-086-BD





Drive Shaft Universal Joints - Lubricate

Apply lubricant through the remote fitting on the rightside of the machine. Use the fitting that is toward therear of the machine.

i01119388

Drive Shaft Universal Joints -LubricateSMCS Code: 3251-086

S/N: AKP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up

S/N: 6PS1-Up

S/N: 3JW1-Up

S/N: 4PW1-Up

S/N: 5FW1-Up

S/N: 5MW1-Up

S/N: 6EW1-Up

S/N: 6HW1-Up

S/N: 7BW1-Up

S/N: 8JW1-Up



Apply lubricant through one fitting on each universaljoint. There is a total of five fittings.

i01902270

Engine Air Filter PrimaryElement - Clean/ReplaceSMCS Code: 1054-070-PY; 1054-510-PY

To avoid personal injury, always wear eye and faceprotection when using pressurized air.

NOTICECaterpillar recommends certified air filter cleaning ser-vices that are available at Caterpillar dealers. TheCaterpillar cleaning process uses proven proceduresto assure consistent quality and sufficient filter life.

Observe the following guidelines if you attempt toclean the filter element:

Do not tap or strike the filter element in order to re-move dust.

Do not wash the filter element.

Use low pressure compressed air in order to removethe dust from the filter element. Air pressure must notexceed 207 kPa (30 psi). Direct the air flow up thepleats and down the pleats from the inside of the filterelement. Take extreme care in order to avoid damageto the pleats.

Do not use air filters with damaged pleats, gaskets, orseals. Dirt entering the engine will cause damage toengine components.

NOTICEService the air filter only with the engine stopped. En-gine damage could result.

1. Open the engine compartment. The air filter islocated on the right side of the machine.


126 SEBU7018-08Maintenance SectionEngine Air Filter Primary Element - Clean/Replace

2. Loosen the cover latches and remove the aircleaner cover.

Note: The latches for the air cleaner housing maysnap open when you release the latches.


3. Remove the primary filter element from the aircleaner housing. In order to remove the engine airfilter primary element, pull the element outward.While you pull the element outward, rock theelement.

Use Steps 4 through 6 in order to clean theprimary element:

4. Inspect the primary element. If the pleats, thegaskets, or the seals are damaged, discard theelement. Replace a damaged primary elementwith a clean primary element.


5. If the primary element is not damaged, clean theprimary element.

Pressurized air can be used to clean a primaryelement that has not been cleaned more than twotimes. Use filtered, dry air at a maximum pressureof 207 kPa (30 psi).

Note: Pressurized air will not remove deposits ofcarbon and oil.

6. When you clean the primary element, alwaysbegin in the inside of the element (clean side).This will force dirt particles toward the outside ofthe element (dirty side).

Direct the air along the length (inside) of the filter.This will help prevent damage to the paper pleats.

Note: Do not aim the stream of air directly at theprimary element. Dirt could be forced further into thepleats.

Use Steps 7 through 10 in order to inspect theprimary element:


7. Place a light bulb inside the filter element. Use a60 watt blue light in a dark room or in a similarfacility. Inspect the primary element for light thatmay show through the filter material.

8. Inspect the primary element while you rotate theelement. Inspect the primary element for tearsand/or holes. Do not use a primary element thathas any tears and/or holes in the filter material. Donot use a primary element with damaged pleats,gaskets, or seals.

9. If it is necessary, compare the primary elementto a new primary element. Use a new primaryelement that has the same part number. This maybe necessary in order to confirm the results of theinspection.

10.Discard a damaged primary element.

Use Steps 11 through 13 to install a cleanprimary element:

NOTICEDo not use a filter if the pleats, the gaskets or the sealsare damaged.


Engine Air Filter Secondary Element - Replace

11. Install a clean primary filter element over theengine air filter secondary element. Apply firmpressure to the end of the primary element asyou gently rock the filter element. This seats theprimary element.

12.Clean the cover for the air cleaner housing. Alignthe slot on the cover with the pin on the air cleanerhousing. Install the cover.

13.Close the engine.

i01902345

Engine Air Filter SecondaryElement - ReplaceSMCS Code: 1054-510-SE

NOTICEAlways replace the secondary filter element. Neverattempt to reuse it by cleaning.

The secondary filter element should be replaced at thetime the primary element is serviced for the third time.

The secondary filter element should also be replacedif the yellow piston in the filter element indicator en-ters the red zone after installation of a clean primaryelement, or if the exhaust smoke is still black.

1. Open the engine hood. The air filter is located onthe right side of the machine.

2. Remove the primary element from the air filterhousing.

Note: Refer to Operation and Maintenance Manual,“Engine Air Filter Primary Element - Clean/Replace ”for the procedure to remove the primary filter element.


3. Remove the secondary filter element.

4. Cover the air inlet opening. Clean the inside ofthe air filter housing.

5. Inspect the gasket between the air inlet pipe andthe air filter housing. Replace the gasket if thegasket is damaged.

6. Uncover the air inlet opening. Install a newsecondary filter element.

7. Install the primary filter element.

8. Clean the cover of the air filter housing and installthe cover on the air filter housing. Fasten theclips in order to secure the cover on the air filterhousing.


9. Reset the filter element indicator.

10.Close the engine hood.

i01902363

Engine Air Filter ServiceIndicator - InspectSMCS Code: 7452-040

NOTICEService the air cleaner only with the engine stopped.Engine damage could result.

Open the access door on the right side of themachine in order to access the service indicator.

128 SEBU7018-08Maintenance SectionEngine Air Filter Service Indicator - Inspect/Replace


Service the air cleaner when the yellow piston inthe service indicator is in the red zone. The serviceindicator can be checked when the engine is runningor stopped.

i01902376

Engine Air Filter ServiceIndicator - Inspect/ReplaceSMCS Code: 7452-040; 7452-510


To check the condition of the service indicator, tryresetting the service indicator. This should requireless than three pushes of the reset button.

Next, check the movement of the yellow piston in theservice indicator. Start the engine and acceleratethe engine to high idle for a few seconds. Afterthe governor control pedal is released, the yellowpiston should remain at the highest position that wasachieved during acceleration.

If either of these conditions are not met, replace theservice indicator.

i01438467

Engine Air Precleaner - CleanSMCS Code: 1055-070


NOTICEService the air cleaner only with the engine stopped.Engine damage could result.

1. Remove the precleaner.

2. Inspect the air inlet screen for dirt and for trash.Remove the screen. Clean the screen if thescreen is dirty.

3. Inspect the precleaner tube openings. Removedirt and debris.

4. Clean the precleaner with compressed air or washthe precleaner in warm water. Dry all the parts.

5. Install the precleaner screen.


Engine Auxiliary Air Filter - Replace

i01902420

Engine Auxiliary Air Filter -Replace(If Equipped)SMCS Code: 1054-070-AX; 1054-510-AX

Some machines may be equipped with an auxiliaryair filter that is located behind the main air filterhousing. Use the following procedure to replace theauxiliary air filter.

1. Remove four bolts and the access plate on theengine hood.

g00351832Illustration 203Side view of the auxiliary air filter housing

2. Remove four nuts (1) and access cover (2) fromthe top of auxiliary air filter housing (3).

3. Remove the auxiliary air filter element.

4. Cover air outlet (4). Clean the inside of theauxiliary air filter housing.

5. Uncover the air outlet. Install a new auxiliary airfilter element.

6. Install access cover (2) and four nuts (1).

7. Install the access plate on the engine hood andsecure the access plate with the four bolts.

i01908770

Engine Crankcase Breather -CleanSMCS Code: 1317-070

1. Open the engine hood. The engine crankcasebreather is located on the right side of themachine.


2. Loosen the hose clamp and remove outlet hose(3) from breather (1).

3. Remove bolt (2) and the breather.

4. Check the condition of the seal on the breathercover. Replace the seal if the seal is damaged.

5. Wash the breather cover and the element in aclean, nonflammable solvent.

6. Shake the element dry or use pressure air to drythe element.

7. Inspect the outlet hose for damage. Replace thehose, if necessary.

8. Install breather (1) and bolt (2).

9. Install outlet hose (3) and the hose clamp.


130 SEBU7018-08Maintenance SectionEngine Governor Oil Supply Screen - Clean/Inspect/Replace

i01902546

Engine Governor Oil SupplyScreen - Clean/Inspect/ReplaceSMCS Code: 1264-510-Z3; 1264-571-Z3;1278-510-Z3; 1278-571-Z3




1. Open the engine hood. The engine governor is onthe right side of the machine.


2. Disconnect oil supply tube (1).

3. Remove fitting (2) and seal (3) from governorhousing (4).

4. Use a 6 mm hexagon wrench to remove thescreen from governor housing (4).

5. Wash the screen in a clean, nonflammablesolvent. Inspect the screen and the seal fordamage. Replace the screen and/or the seal, ifnecessary.

6. Install the screen far enough into the governorhousing in order to allow clearance for the sealand for the fitting.

7. Install seal (3), fitting (2), and oil supply tube (1).

8. Start the engine and check the engine governor forleaks. Stop the engine and make any necessaryrepairs.

9. Close the engine hood.

i01902569

Engine Oil Level - CheckSMCS Code: 1000-535-FLV

NOTICEDo not under fill or overfill engine crankcase with oil.Either condition can cause engine damage.

1. Stop the engine. Open the engine access door onthe right side of the machine.


2. Remove dipstick (2) and wipe off the dipstickwith a clean cloth. Then, reinsert the dipstick andremove the dipstick again. This will give a moreaccurate measurement of the oil level.

3. Maintain the engine oil within the crosshatchedregion on dipstick (2). If necessary, remove fillercap (1) and add oil.

4. Close the engine access door.


Engine Oil Sample - Obtain

i01902584

Engine Oil Sample - ObtainSMCS Code: 1348-008; 7542




1. Operate the machine for a few minutes beforeobtaining the oil sample. This will thoroughly mixthe engine oil for a more accurate sample.

2. Open the engine hood.


The in-line sampling valve is located on the right side of the enginecompartment.

3. Use the in-line sampling valve in order to obtaina sample of engine oil.



i02625081

Engine Oil and Filter - ChangeSMCS Code: 1318-510


Refer to Special Publication, NENG2500, “CaterpillarDealer Service Tool Catalog” for tools and suppliessuitable to collect and contain fluids on Caterpillarproducts.


Selection of the Oil Change Interval

NOTICEA 500 hour engine oil change interval is available, pro-vided that the operating conditions and recommend-ed multigrade oil types are met. When these require-ments are not met, shorten the oil change interval to250 hours, or use an S·O·S oil sampling and analysisprogram to determine an acceptable oil change inter-val.

If you select an interval for oil and filter change that istoo long, you may damage the engine.

Caterpillar oil filters are recommended.

Recommended multigrade oil types are listed in Table14 and in Table 15. Do not use single grade oils.

132 SEBU7018-08Maintenance SectionEngine Oil and Filter - Change


Abnormally harsh operating cycles or harshenvironments can shorten the service life ofthe engine oil. Arctic temperatures, corrosiveenvironments, or extremely dusty conditions mayrequire a reduction in engine oil change intervalsfrom the recommendations in Table 14 and Table 15.Also refer to Special Publication, SEBU5898, “ColdWeather Recommendations”. Poor maintenance ofair filters or of fuel filters requires reduced oil changeintervals. See your Caterpillar dealer for moreinformation if this product will experience abnormallyharsh operating cycles or harsh environments.

Table 14

950G Wheel LoaderEngine Oil Change Interval(1)

Operating Conditions

Severe

FuelSulfurfrom0.3% to0.5%

MultigradeOil Type

Normal(2) HighLoadFactor(3)above23 L (6US gal)per hrof fuel

(4)

Altitudeabove1830 m(6000 ft)

Cat DEOPreferred 500 hr 500 hr 500 hr 250 hr(6)

ECF-111.0

minimumTBN(4)Preferred

500 hr 500 hr 500 hr 250 hr(6)

ECF-1TBN(4)

below 11.0500 hr 500 hr 250 hr(5) 250 hr(6)

API CG-4 500 hr 250 hr(5) 250 hr(5) 250 hr(6)

(1) The traditional oil change interval for engines is 250 hours. Thestandard oil change interval in this machine is 500 hours, if theoperating conditions and recommended oil types that are listedin this table are met. Improvements in the engine allow thisengine oil change interval. This new standard interval is notpermitted for other machines. Refer to the applicable Operationand Maintenance Manuals for the other machines.

(2) Normal conditions include these factors: Fuel sulfur below0.3%, altitude below 1830 m (6000 ft), and good air filter andfuel filter maintenance. Normal conditions do not include highload factor, harsh operating cycles, or harsh environments.

(3) High load factors can shorten the service life of your engineoil. Continuous heavy load cycles and very little idle timeresult in increased fuel consumption and oil contamination.These factors deplete the oil additives more rapidly. If theaverage fuel consumption of your 950G Wheel Loader exceeds23 L (6 US gal) per hour, follow the “High Load Factor”recommendations in Table 14. To determine average fuelconsumption, measure average fuel consumption for a periodof 50 to 100 hours. If the application of the machine is changed,the average fuel consumption may change.

(4) For sulfur content above 0.5%, refer to Special Publication,SEBU6250, “Total Base Number (TBN) and Fuel Sulfur Levelsfor Direct Injection (DI) Diesel Engines” .

(5) In order to verify an oil change interval of 500 hours, refer to“Program A” below.

(6) Use “Program B” below to determine an appropriate interval.


Engine Oil and Filter - Change

Table 15

962G Wheel LoaderIT62G Integrated ToolcarrierEngine Oil Change Interval(1)

Operating Conditions

Severe

FuelSulfurfrom0.3% to0.5%

MultigradeOil Type

Normal(2) HighLoadFactor(3)above25 L(6.5 USgal) perhr offuel

(4)

Altitudeabove1830 m(6000 ft)

Cat DEOPreferred 500 hr 500 hr 500 hr 250 hr(6)

ECF-111.0

minimumTBN(4)Preferred

500 hr 500 hr 500 hr 250 hr(6)

ECF-1TBN(4)

below 11.0500 hr 500 hr 250 hr(5) 250 hr(6)

API CG-4 500 hr 250 hr(5) 250 hr(5) 250 hr(6)

(1) The traditional oil change interval for engines is 250 hours. Thestandard oil change interval in this machine is 500 hours, if theoperating conditions and recommended oil types that are listedin this table are met. Improvements in the engine allow thisengine oil change interval. This new standard interval is notpermitted for other machines. Refer to the applicable Operationand Maintenance Manuals for the other machines.

(2) Normal conditions include these factors: Fuel sulfur below0.3%, altitude below 1830 m (6000 ft), and good air filter andfuel filter maintenance. Normal conditions do not include highload factor, harsh operating cycles, or harsh environments.

(3) High load factors can shorten the service life of your engineoil. Continuous heavy load cycles and very little idle timeresult in increased fuel consumption and oil contamination.These factors deplete the oil additives more rapidly. If theaverage fuel consumption of your 962G Wheel Loader exceeds25 L (6.5 US gal) per hour, follow the “High Load Factor”recommendations in Table 15. To determine average fuelconsumption, measure average fuel consumption for a periodof 50 to 100 hours. If the application of the machine is changed,the average fuel consumption may change.

(4) For sulfur content above 0.5%, refer to Special Publication,SEBU6250, “Total Base Number (TBN) and Fuel Sulfur Levelsfor Direct Injection (DI) Diesel Engines”.

(5) In order to verify an oil change interval of 500 hours, refer to“Program A” below.

(6) Use “Program B” below to determine an appropriate interval.

Adjustment of the Oil Change Interval

Note: Your Caterpillar dealer has additionalinformation on these programs.

Program A

Verification for an Oil Change Interval of 500 Hours

This program consists of three oil change intervals of500 hours. Oil sampling and analysis is done at 250hours and 500 hours for each of the three intervalsfor a total of six oil samples. The analysis includesoil viscosity and infrared (IR) analysis of the oil. Ifall of the results are satisfactory, the 500 hour oilchange interval is acceptable for the machine in thatapplication. Repeat Program A if you change theapplication of the machine.

If a sample does not pass the oil analysis, take oneof these actions:

• Shorten the oil change interval to 250 hours.

• Proceed to Program B.

• Change to a preferred oil type in Table 14 or Table15.

Program B

Optimizing Oil Change Intervals

Begin with a 250 hour oil change interval. The oilchange intervals are adjusted by increments. Eachinterval is adjusted an additional 50 hours. Periodic oilsampling and analysis is done during each interval.The analysis includes oil viscosity and infrared (IR)analysis of the oil. Repeat Program B if you changethe application of the machine.

If an oil sample does not pass the analysis, shortenthe oil change interval, or change to a preferredmultigrade oil type in the listing above.

References

Reference: Form, PEDP7035, “Optimizing OilChange Intervals”

Reference: Form, PEDP7036, “S·O·S Fluid Analysis”

Reference: Form, PEHP7076, “Understanding S·O·SServices Test”

1. Open the engine hood.

2. The crankcase drain valve is located on the rightside of the oil pan beneath the machine. Open thecrankcase drain valve and allow the oil to draininto a suitable container. Close the drain valve.

134 SEBU7018-08Maintenance SectionEngine Valve Lash - Check


3. Use a strap type wrench to remove filter element(1) from the left side of the machine. Inspect theoil filter.

Reference: Refer to Operation and MaintenanceManual, “Oil Filter - Inspect”.

4. Clean the filter housing base. Make sure that all ofthe used filter gasket is completely removed.


5. Apply a thin coat of clean engine oil to the sealingsurface of the new filter element.

6. Install the new filter element by hand. After thegasket contacts the filter base, tighten the filter byan additional 3/4 turn.


7. Some machines are equipped with an additionalbypass oil filter (2) on the right side of the machinenear the fuel filter. Use Steps 3 through 6 toreplace the bypass oil filter.

8. Remove filler cap (3). Fill the crankcase with newoil.

Reference: Refer to Operation and MaintenanceManual, “Lubricant Viscosities and RefillCapacities” for the correct type of oil and for thecorrect amount of oil.

9. Clean the filler cap and install the filler cap.

10.Start the engine and allow the oil to warm. Checkfor leaks.

11.Check the oil level on dipstick (4).

Reference: Refer to Operation and MaintenanceManual, “Engine Oil Level - Check” for the correctprocedure.

12.Close the engine hood and stop the engine.

i01181536

Engine Valve Lash - CheckSMCS Code: 1105-535

For the correct procedure, refer to the appropriateService Manual module for your machine’s engine orconsult your Caterpillar dealer.

Note: A qualified mechanic should adjust the enginevalve lash because special tools and training arerequired.


Ether Starting Aid Cylinder - Replace

i01911242

Ether Starting Aid Cylinder -Replace(If Equipped)SMCS Code: 1456-510-CD

1. Open the engine hood. The ether cylinder islocated on the left side of the engine.


2. Loosen the cylinder retaining clamp (1). Unscrewand remove the empty ether cylinder (2).

3. Remove the used gasket. Install the new gasketthat is provided with each new cylinder.

4. Install the new cylinder. Tighten the cylinder handtight. Tighten the ether cylinder clamp securely.


i00643879

Fuel Injection Timing - CheckSMCS Code: 1290-531-FT

Refer to the Service Manual for the completeadjustment procedure for the Fuel injector timing.

Note: The correct fuel timing specification isfound on the Engine Information Plate. Fueltiming specifications may vary for different engineapplications and/or for different power ratings.

A qualified mechanic should adjust the fuel injectortiming because special tools and training arerequired.

i01902620

Fuel System - PrimeSMCS Code: 1250-548




Note: The volume of the air in the water separatoris small. Usually, it is not necessary to prime thefuel system if only the water separator element waschanged.

1. Stop the engine and open the engine hood. Thefuel priming pump is located above the primaryfuel filter on the right side of the machine.

g00990031Illustration 213Manual Priming Pump

136 SEBU7018-08Maintenance SectionFuel System Primary Filter (Water Separator) - Drain

g00700133Illustration 214Electric Priming Pump

Note: Some machines may not be equipped withvent valve (1). In this case, proceed to Step 4.

2. Open vent valve (1) at the fuel transfer pump andoperate priming pump (2) until the fuel that flowsfrom the hose has no air bubbles. This will fillwater separator element (3) with fuel.

Catch the fuel in a suitable container.

Note: Approximately 100 strokes will be needed witha manual fuel priming pump in order to prime the fuelsystem to this point. Operate an electric fuel pumpfor approximately 30 seconds in order to prime thefuel system to this point.

3. Close vent valve (1).

4. Open drain valve (4) that is located toward theright side of the fuel filter base. Do not open thedrain valve that is located toward the left sideof the fuel filter base.

5. Operate priming pump (2) until fuel that flowsfrom the hose has no air bubbles. This will fill thesecondary fuel filters with fuel.

Catch the fuel in a suitable container.

Note: Approximately 300 strokes will be needed witha manual priming pump in order to prime the fuelsystem to this point. Operate an electric fuel pumpfor approximately 60 seconds in order to prime thefuel system to this point.

6. Close drain valve (4) on the fuel filter base.

7. Start the engine.

Note: Additional priming may be needed if you arepriming because of the following circumstances:

• The engine will not start.

• The engine starts but the engine continues tomisfire.

• The engine starts but the engine continues to emitsmoke.

• The engine has run out of fuel.

• The fuel injectors have been removed from theengine.

This additional priming will take approximately 100strokes with a manual fuel priming pump. Operatean electric fuel pump for approximately 30 secondsfor this additional priming.

i01902645

Fuel System Primary Filter(Water Separator) - DrainSMCS Code: 1263-543




1. Open the engine hood. The water separator islocated on the bottom of the primary fuel filter onthe right side of the machine.


Fuel System Primary Filter (Water Separator) Element - Replace


2. Open drain valve (1) on the bottom of the waterseparator bowl. Allow the water and the fuel todrain into a suitable container.

3. Close drain valve (1).

Note: The water separator is under suction duringnormal engine operation. Tighten the drain valvesecurely in order to prevent air leakage into the fuelsystem.


i01902690

Fuel System Primary Filter(Water Separator) Element -ReplaceSMCS Code: 1260-510; 1263-510-FQ




NOTICEDo not fill fuel filters with fuel before installing them.The fuel will not be filtered and could be contaminated.Contaminated fuel will cause accelerated wear to fuelsystem parts. The fuel system should be primed priorto starting the engine.

1. Open the engine hood. The primary fuel filter islocated on the right side of the machine.


2. Open drain valve (1) on the bottom of waterseparator bowl (3). Allow the water and the fuel todrain into a suitable container.

3. Support the water separator element and rotatethe retaining ring (2) counterclockwise. Removethe retaining ring (2).

4. Remove the water separator element from themounting base.

5. Remove water separator bowl (3) from the filterelement. Clean the water separator bowl and theO-ring groove.

Note: The water separator bowl is reusable. Do notdiscard the water separator bowl.

6. Inspect the O-ring seal on the water separatorbowl. Replace the O-ring seal, if necessary.

7. Lubricate the O-ring seal with clean diesel fuel orwith engine oil. Place the O-ring seal in the waterseparator bowl.

8. Install water separator bowl (3) onto the new filterelement by hand until the filter element is snug.Do not use tools to tighten the filter element.

138 SEBU7018-08Maintenance SectionFuel System Secondary Filter Number One - Replace

9. Install the new filter element. Rotate retainingring (2) clockwise in order to fasten the filter tothe mounting base. Continue to turn the retainingring until an audible click is heard. If a click is notheard, the retaining ring has not been rotated farenough and the filter element is not in the lockedposition.

10.Close drain valve (1).

Note: The water separator element is under suctionduring normal engine operation. Tighten the drainvalve securely in order to prevent air leakage intothe fuel system.

11.Prime the fuel system in order to fill the waterseparator element with fuel.

Reference: Refer to Operation and MaintenanceManual, “Fuel System - Prime” for the correctprocedure.


i01902696

Fuel System Secondary FilterNumber One - ReplaceSMCS Code: 1261-510-SE

Personal injury or death may result from failure toadhere to the following procedures.

Fuel leaked or spilled onto hot surfaces or electri-cal components can cause a fire.

Clean up all leaked or spilled fuel. Do not smokewhile working on the fuel system.

Turn the disconnect switch OFF or disconnect thebattery when changing fuel filters.




NOTICEDo not fill the fuel filters with fuel before installing thefuel filters. The fuel will not be filtered and could becontaminated. Contaminated fuel will cause acceler-ated wear to fuel system parts.

Open the engine hood. The secondary fuel filter islocated on the right side of the machine.

Note: This machine is equipped with two secondaryspin-on filters on a single filter base. The upper filteris upside-down. Always drain the inverted filter beforeyou remove either filter.


1. To drain upper filter (2) (inverted filter), place asuitable container under the drain valves andopen drain valve (3). Then, immediately opendrain valve (4) and allow the fuel to drain into thesuitable container.


Fuel System Secondary Filter Number Two - Replace

When the fuel stops draining, keep the drainvalves open and loosen upper filter (2) by a 1/4turn. As the filter is loosened, additional fuel maydrain from the drain valves. Keep turning the filterby 1/4 turns until fuel does not drain from the drainvalves. Then, close the drain valves and properlydispose of the fuel.

Note: Make sure that the drain valves are opened inthe proper order. If you open the wrong drain valvefirst, an air lock in the fuel system may occur. This willnot allow fuel to drain from the upper filter.

2. Hand tighten the upper filter until the seal contactsthe filter base. Then, tighten upper filter (2) by anadditional 3/4 turn.

Rotation index marks are positioned on the filterat 90 degree intervals. Use these rotation indexmarks as a guide when you tighten the filter.

3. Remove lower filter (1).

Note: Lower filter (1) has not been drained. The filtercontains fuel. When you remove the lower filter, usecaution in order to avoid spilling the fuel.

4. Inspect the fuel filter element for debris by cuttingthe filter open. Discard the used fuel filter elementproperly.

5. Clean the filter mounting base. Make sure thatall of the used seal is removed from the filtermounting base.


6. Apply a thin coat of clean diesel fuel to the sealingsurface of the new fuel filter element.

7. Install the new fuel filter element by hand. Whenthe seal contacts the filter base, tighten the fuelfilter element by an additional 3/4 turn. This willtighten the fuel filter element sufficiently.


8. Prime the fuel system.



i01902711

Fuel System Secondary FilterNumber Two - ReplaceSMCS Code: 1261-510-SE

Personal injury or death may result from failure toadhere to the following procedures.

Fuel leaked or spilled onto hot surfaces or electri-cal components can cause a fire.

Clean up all leaked or spilled fuel. Do not smokewhile working on the fuel system.

Turn the disconnect switch OFF or disconnect thebattery when changing fuel filters.




NOTICEDo not fill the fuel filters with fuel before installing thefuel filters. The fuel will not be filtered and could becontaminated. Contaminated fuel will cause acceler-ated wear to fuel system parts.

Open the engine hood. The secondary fuel filter islocated on the right side of the machine.

Note: This machine is equipped with two secondaryspin-on filters on a single filter base. The upper filteris upside-down. Always drain the inverted filter beforeyou remove either filter.

140 SEBU7018-08Maintenance SectionFuel Tank Cap and Strainer - Clean


1. To drain upper filter (2) (inverted filter), place asuitable container under the drain valves andopen drain valve (3). Then, immediately opendrain valve (4) and allow the fuel to drain into thesuitable container.

When the fuel stops draining, keep the drainvalves open and loosen the inverted filter by a 1/4turn. As the filter is loosened, additional fuel maydrain from the drain valves. Keep turning the filterby 1/4 turns until fuel does not drain from the drainvalves. Then, close the drain valves and properlydispose of the fuel.

Note: Make sure that the drain valves are opened inthe proper order. If you open the wrong drain valvefirst, an air lock in the fuel system may occur. This willnot allow fuel to drain from the upper filter.

2. Remove upper filter (2).

3. Inspect the fuel filter element for debris by cuttingthe filter open. Dispose of the used fuel filterelement properly.

4. Clean the filter mounting base. Make sure thatall of the used seal is removed from the filtermounting base.


5. Apply a thin coat of clean diesel fuel to the sealingsurface of the new fuel filter element.

6. Install the new fuel filter element by hand. Whenthe seal contacts the filter base, tighten the fuelfilter element by an additional 3/4 turn. This willtighten the fuel filter element sufficiently.


7. Prime the fuel system.



i01464102

Fuel Tank Cap and Strainer -CleanSMCS Code: 1273-070-Z2; 1273-070-STR

The fuel tank cap is located on the left side of themachine.


Fuel Tank Water and Sediment - Drain


1. Remove fuel tank cap (1) and strainer (3) fromfuel tank (4). Remove seal (2) from the cap.

2. Wash the strainer and the fuel tank cap in a clean,nonflammable solvent.

3. Install the strainer into the filler opening.

4. Inspect the seal for damage. Replace the seal, ifnecessary. Install the fuel tank cap.

i01464158

Fuel Tank Water and Sediment- DrainSMCS Code: 1273-543-M&S


The drain valve is located under the fuel tank.

1. Open the drain valve and allow the water andsediment to drain into a suitable container.

2. Close the drain valve.

Note: If water and sediment are regularly found atweekly maintenance intervals, drain the sedimentdaily.

i01902769

Fuses - ReplaceSMCS Code: 1417-510

NOTICEReplace the fuses with the same type and size only.Otherwise, electrical damage can result.

If it is necessary to replace fuses frequently, an elec-trical problem exists. Contact your Caterpillar dealer.

Fuses – The fuses protect the electricalsystem from a circuit that has beenoverloaded. Change a fuse if the element

separates. If the element of a new fuse separates,check and repair the circuit.


The fuse panel is located at the rear of the operatorcompartment.

Transmission Control (1) – 10 amp

Secondary Steering (2) (if equipped) –10 amp

Turn Signals and Rotating Beacon (3) –10 amp

Quick Coupler(4) (if equipped) – 10 amp

142 SEBU7018-08Maintenance SectionHood Tilt Actuator - Lubricate

Window Wipers (5) – 10 amp

Payload Control System (6) – 10 amp

Electric Converter (7) – 10 amp

Digital Electrical Monitoring System(8) – 10 amp

Rear Floodlights (9) – 15 amp

Front Floodlights (10) – 15 amp

Lighter (11) – 10 amp

Axle Oil Cooler (12) (if equipped) – 10amp

Hydraulic System (13) – 10 amp

Implements (14) – 10 amp


Additional fuses are located in the enginecompartment on the right side of the machine.

Backup Alarm (15) – 10 amp

Brake Lights (16) – 10 amp

Engine Start Switch (17) – 10 amp

Horn (18) – 10 amp

i01316855

Hood Tilt Actuator - LubricateSMCS Code: 7275-086


1. Raise the engine hood. The hood tilt actuator islocated on the right side of the machine.

2. Fully extend the cylinder and wipe off the innerpost with a clean cloth. Then, lubricate the entirelength of the inner post.

3. Wipe off both fittings on the cylinder. Then, applylubricant through the two fittings until the lubricantescapes back through each fitting.



Hydraulic System Biodegradable Oil Filter Element - Replace

i01908975

Hydraulic SystemBiodegradable Oil FilterElement - Replace(If Equipped)SMCS Code: 5068-510

S/N: BDP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 5FW1-Up

S/N: 7BW1-Up

1. Open the engine hood. The oil filter is located onthe right side of the machine.





2. Remove filter housing drain plug (1). Allow the oilto drain into a suitable container.

3. Use a strap type wrench to remove filter housing(2).

4. Remove the used filter element. Dispose of theused filter element properly.

5. Clean the filter housing and the filter housing basewith a clean, nonflammable solvent.

6. Inspect the seal on the filter housing. Replace theseal if the seal is damaged.

7. Insert a new filter element into the filter housing.

8. Install filter housing drain plug (1). Install filterhousing (2) onto the filter housing base. Tightenthe filter housing by hand.


10.Start the engine and run the engine for a fewminutes. Check the hydraulic oil level.

Reference: Refer to Operation and MaintenanceManual, “Hydraulic System Oil Level - Check” forthe correct procedure.

i01911223

Hydraulic SystemBiodegradable Oil FilterRestriction - Check(If Equipped)SMCS Code: 5068-535-RS; 7450-535-HR

S/N: BDP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 5FW1-Up

S/N: 7BW1-Up

1. Operate the machine in order to warm thehydraulic oil to operating temperature.

2. Lower the attachment to the ground. Engage theparking brake.

3. Open the engine hood. The oil filter is located onthe right side of the machine.

144 SEBU7018-08Maintenance SectionHydraulic System Oil - Change


4. Press the button on the top of hydraulic tankbreaker relief valve (2) in order to relieve any tankpressure.

5. Install a pressure gauge on pressure tap (1) thatis on the top of the filter housing.

6. Operate the engine at high idle. Read the valueon the pressure gauge.

If the pressure is between 1.0 ± 0.2 bars and 2.5± 0.2 bars, the biodegradable hydraulic oil filteris clean.

If the pressure is 2.5 ± 0.2 bars or more, thebiodegradable hydraulic oil filter is plugged.

7. If the biodegradable hydraulic oil filter is plugged,replace the biodegradable hydraulic oil filterelement.

Reference: Refer to Operation and MaintenanceManual, “Hydraulic System Biodegradable OilFilter Element - Replace” for the correct procedure.

i01773322

Hydraulic System Oil - ChangeSMCS Code: 5056-044

Selection of the Oil Change IntervalYour machine may be able to use a 4000 hourinterval for the hydraulic oil. The hydraulic oil is inthe system that is not integral to the service brakes,the clutches, the final drives, or the differentials.The standard change interval is 2000 hours. The oilshould be monitored during intervals of 500 hours.The extended 4000 hour interval can be used if thefollowing criteria are met.

Oil Filters

Caterpillar oil filters are recommended. The intervalfor changing the oil filter should be 500 hours.

Oil

The 4000 hour interval for changing the oil is for thefollowing oil types.

• Caterpillar Hydraulic Oil (HYDO)

• Caterpillar Transmission and Drive Train Oil(TDTO)

• Caterpillar TDTO (TMS)

• Caterpillar Diesel Engine Oil

• Caterpillar Biodegradable Hydraulic Oils (HEES)

• Caterpillar Multipurpose Tractor Oil (MTO)

• Heavy-duty diesel engine oils with a minimum zinccontent of 900 ppm (CF, CF-4, CG-4, and CH-4)

Note: Industrial hydraulic oils are not recommendedin Caterpillar hydraulic systems. These oils are morelikely to cause corrosion and excessive wear.

Monitoring the Condition of the Oil

The oil should be monitored during intervals of 500hours. Caterpillar’s standard SOS Fluids Analysis oran equivalent oil sampling program should be used.

The current guidelines for cleanliness of the oilshould be observed. Refer to “Measured Data”.

If an oil sampling program is not available, thestandard 2000 oil change interval should be used.

Measured Data

The following information should be monitoredthrough sampling of the oil:

• Significant changes in wear metals should bemonitored. These metals include iron, copper,chromium, lead, aluminum, and tin.

• Significant changes in the following additivesshould be monitored: zinc, calcium, magnesium,and phosphorus.

• Contaminants should not be present. Thesecontaminants include fuel and antifreeze. Watercontent should be .5 percent or less.


Hydraulic System Oil - Change

• The silicon level should not exceed 15 parts permillion for new oil. The particle counts should bemonitored.

• The recommended level of cleanliness forCaterpillar machines that are operated in the fieldis ISO 18/15 or cleaner. The cleanliness shouldbe monitored by particle count analysis. Thelevels of contamination should not exceed thenormal by more than two ISO codes. Action shouldbe taken in order to determine the cause of thecontamination. The system should be returned tothe original levels of contamination.

• There should not be significant changes in sodium,silicon, copper, and potassium.

• The allowable level of oxidation is 40 percent (0.12Abs units).

• The kinematic viscosity of 100 °C (212 °F) shouldnot exceed a 2 cSt change from new.

Procedure for Changing theHydraulic Oil




1. Operate the machine in order to warm thehydraulic oil.

2. Park the machine on level ground. Lower theattachment to the ground and apply slightdownward pressure. Engage the parking brakeand stop the engine.


3. The hydraulic tank is located on the right side ofthe machine. Press the button on the breaker reliefvalve (1) in order to relieve any tank pressure.

4. Remove the hydraulic tank filler cap (2) andthe filler strainer (3). Wash the filler cap and thestrainer in a clean, nonflammable solvent. Installthe strainer.

5. Inspect the gasket on the hydraulic tank filler capfor damage. Replace the gasket, if necessary.

6. Remove the drain plug (5) from the bottom of thehydraulic tank. Wash the drain plug in a clean,nonflammable solvent.

7. The hydraulic tank is equipped with an ecologydrain valve. Attach a hose to a 126-7914 OilDrain Coupling. Install the threaded end of thecoupling into the drain valve in order to unseatthe internal drain valve.

NOTICENever start the engine while the hydraulic oil tank isbeing drained or while the hydraulic oil tank is empty.Excessive wear and damage to the hydraulic compo-nents can occur.

8. Close the drain valve. Install the drain plug.

9. Change the hydraulic oil filter.

Reference: Refer to Operation and MaintenanceManual, “Hydraulic System Oil Filter - Replace” forthe correct procedure.

146 SEBU7018-08Maintenance SectionHydraulic System Oil Filter - Replace

10. Fill the hydraulic tank with clean oil. Make surethat the oil level is at the “FULL” mark on the sightgauge (4). Install the filler cap.


11.Start the engine and run the engine for at least tenseconds. Then, stop the engine and add hydraulicoil to the tank until the oil level is at the “FULL”mark on the sight gauge. Install the filler cap.

12.Start the engine and run the engine at low idle.Cycle the implements so that all hydraulic systemsare filled with oil.

Note: If the alert indicator for a low oil level comeson, stop the engine and immediately add oil to thehydraulic tank. The oil level should not be below thesuction ports in the hydraulic tank while the engineis running.

13.Add hydraulic oil to the tank until the oil level is atthe “FULL” mark on the sight gauge.

14.Stop the engine. Top off the hydraulic tank so thatthe oil level is at the “FULL” mark on the sightgauge. Install the filler cap.

Note: The oil must be free of air bubbles. If airbubbles are present in the hydraulic oil, air is enteringthe hydraulic system. Inspect the hydraulic suctionline and the hose clamps.

15. If necessary, tighten any loose clamps or anyloose connections. Replace any damaged hoses.

i01465406

Hydraulic System Oil Filter -ReplaceSMCS Code: 5068-510





The hydraulic filter is located on the right side of themachine.

1. Use a strap type wrench to remove the filterelement. Dispose of the used filter elementproperly.

2. Clean the filter mounting base. Make sure that allof the used gasket is completely removed.


Hydraulic System Oil Level - Check


3. Lubricate the gasket of the new filter element withclean hydraulic oil.

4. Install the new filter element by hand. After thegasket contacts the filter mounting base, tightenthe filter element by an additional 3/4 turn.

5. Start the engine and run the engine at low idle.Inspect the hydraulic system for leaks.


6. Maintain the oil level above the “ADD COLD” markon the sight gauge. Add hydraulic oil, if necessary.

i01465502

Hydraulic System Oil Level -CheckSMCS Code: 5056-535-FLV


The hydraulic tank is located on the right side of themachine.

Maintain the oil level above the “ADD COLD” markon sight gauge (2). If necessary, remove filler cap (1)slowly and add oil.

i01903274

Hydraulic System Oil Sample- ObtainSMCS Code: 5050-008; 5056-008; 7542




148 SEBU7018-08Maintenance SectionHydraulic Tank Breaker Relief Valve - Clean

1. Operate the machine for a few minutes beforeobtaining the oil sample. Operate the hydrauliccontrols. This will thoroughly mix the hydraulic oilfor a more accurate sample.


2. Open the engine access door on the left side ofthe machine. The sampling valve for the hydraulicoil is located on the hydraulic oil filter basebeneath the cab on the left side of the machine.


3. Use the in-line sampling valve in order to obtain asample of hydraulic oil.

4. Close the engine access door.


i01465512

Hydraulic Tank Breaker ReliefValve - CleanSMCS Code: 5118-070


The hydraulic tank breaker relief valve is located onthe top of the hydraulic tank on the right side of themachine.

1. Press the button on the top of the hydraulicbreaker in order to relieve the pressure in thehydraulic tank. Remove the hydraulic tank breakerrelief valve.

2. Clean the hydraulic tank breaker relief valve in aclean, nonflammable solvent. Shake the breakerrelief valve dry or use pressure air to dry thebreaker relief valve.

3. Install the hydraulic tank breaker relief valve.

i01718807

Logging Fork Clamp -LubricateSMCS Code: 6113-086-BD; 6410-086-BD


SEBU7018-08 149Maintenance SectionOil Filter - Inspect


Apply lubricant through three fittings on each sideof the logging fork.

There is a total of six fittings.

i02106227

Oil Filter - InspectSMCS Code: 1308-507; 3004-507; 3067-507;5068-507

Inspect a Used Filter for Debris


The element is shown with debris.

Use a filter cutter to cut the filter element open.Spread apart the pleats and inspect the element formetal and for other debris. An excessive amount ofdebris in the filter element can indicate a possiblefailure.

If metals are found in the filter element, a magnet canbe used to differentiate between ferrous metals andnonferrous metals.

Ferrous metals can indicate wear on steel parts andon cast iron parts.

Nonferrous metals can indicate wear on thealuminum parts of the engine such as main bearings,rod bearings, or turbocharger bearings.

Small amounts of debris may be found in the filterelement. This could be caused by friction and bynormal wear. Consult your Caterpillar dealer in orderto arrange for further analysis if an excessive amountof debris is found.

Using an oil filter element that is not recommendedby Caterpillar can result in severe engine damageto engine bearings, to the crankshaft, and to otherparts. This can result in larger particles in unfilteredoil. The particles could enter the lubricating systemand the particles could cause damage.

i01114617

Radiator Core - CleanSMCS Code: 1353-070-KO


1. Open the engine hood. The radiator assembly islocated at the rear of the machine.


2. Remove two bolts (1). Swing hydraulic oil cooler(2) away from radiator (3).

150 SEBU7018-08Maintenance SectionRadiator Core - Clean


3. Remove two bolts (4). Swing air conditionercondenser (5) away from radiator (3).


4. You can use compressed air, high pressure water,or steam to remove dust and other debris fromthe radiator fins. However, the use of compressedair is preferred.

5. Swing the hydraulic oil cooler back into theoperating position and replace the two bolts.

6. Swing the air conditioner condenser back into theoperating position and replace the two bolts.


Low Sound Machines and BlueAngel Machines


1. Push the button and open the radiator grill that islocated on the rear of the machine.


2. Remove bolt (1). Swing hydraulic oil cooler (2)away from the radiator.

3. Remove two bolts (3). Swing air conditionercondenser (4) away from the radiator.



Refrigerant Dryer - Replace

4. You can use compressed air, high pressure water,or steam to remove dust and other debris fromthe radiator fins. However, the use of compressedair is preferred.

5. Swing the hydraulic oil cooler back into theoperating position and replace the bolt.

6. Swing the air conditioner condenser back into theoperating position and replace the two bolts.

7. Close the radiator grill.

i01914104

Refrigerant Dryer - ReplaceSMCS Code: 7322-510

Personal injury can result from contact with refrig-erant.

Contact with refrigerant can cause frost bite. Keepface and hands away to help prevent injury.

Protective goggles must always be worn when re-frigerant lines are opened, even if the gauges in-dicate the system is empty of refrigerant.

Always use precaution when a fitting is removed.Slowly loosen the fitting. If the system is still un-der pressure, release it slowly in a well ventilatedarea.

Personal injury or death can result from inhalingrefrigerant through a lit cigarette.

Inhaling air conditioner refrigerant gas through alit cigarette or other smoking method or inhalingfumes released from a flame contacting air con-ditioner refrigerant gas, can cause bodily harm ordeath.

Do not smoke when servicing air conditioners orwherever refrigerant gas may be present.

Use a certified recovery and recycling cart to prop-erly remove the refrigerant from the air condition-ing system.


Access the refrigerant accumulator from the rightside of the machine. Access the in-line refrigerantdryer from the left side of the machine.

Refer to Service Manual, SENR5664, “In-LineRefrigerant Dryer - Remove and Install” for thereplacement procedure of the in-line refrigerant dryer.

Note: When you operate the machine in a climatewith high humidity, replace the in-line refrigerant dryerafter every 1000 service hours or 6 months.

i01157525

Ride Control Accumulator -CheckSMCS Code: 5077-535-R6

The ride control accumulator reduces the pitching ofthe machine. If the machine seems to be bouncingexcessively, check the charge in the ride controlaccumulator.

Note: Special tools and equipment are required totest the accumulator.

Reference: For more information, refer to Testingand Adjusting, SENR1390, “950G Wheel Loader,962G Wheel Loader and IT62G Integrated ToolcarrierHydraulic System” or consult your Caterpillar dealer.

152 SEBU7018-08Maintenance SectionRoading Fender Hinges - Lubricate

i01457015

Roading Fender Hinges -LubricateSMCS Code: 7252-086-HNG

S/N: BDP1-Up

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 5FW1-Up

S/N: 7BW1-Up



Swing open the roading fender. Apply lubricantthrough one fitting on the hinge. There is one hingeon each side of the machine.

i01457460

Rollover Protective Structure(ROPS) - InspectSMCS Code: 7323-040; 7325-040


Inspect the ROPS for bolts that are loose or damaged.Use original equipment parts only to replace boltsthat are damaged or missing. Tighten the fourcab mounting bolts to a torque of 850 ± 100 N·m(629 ± 74 lb ft).

Note: Apply oil to all bolt threads before installation.Failure to apply oil can result in improper bolt torque.

Do not repair the ROPS by welding reinforcementplates to the ROPS. Consult your Caterpillar dealerfor repair of cracks in any welds, in any castings, orin any metal section of the ROPS.

i02429589

Seat Belt - InspectSMCS Code: 7327-040

Always check the condition of the seat belt and thecondition of the seat belt mounting hardware beforeyou operate the machine. Replace any parts that aredamaged or worn before you operate the machine.

SEBU7018-08 153Maintenance SectionSeat Belt - Replace

g00932801Illustration 248Typical example

Check the seat belt mounting hardware (1) for wearor for damage. Replace any mounting hardware thatis worn or damaged. Make sure that the mountingbolts are tight.

Check buckle (2) for wear or for damage. If the buckleis worn or damaged, replace the seat belt.

Inspect the seat belt (3) for webbing that is worn orfrayed. Replace the seat belt if the seat belt is wornor frayed.

Consult your Caterpillar dealer for the replacement ofthe seat belt and the mounting hardware.

Note:Within three years of the date of installation orwithin five years of the date of manufacture, replacethe seat belt. Replace the seat belt at the date whichoccurs first. A date label for determining the age ofthe seat belt is attached to the seat belt, the seat beltbuckle, and the seat belt retractor.

If your machine is equipped with a seat beltextension, also perform this inspection procedure forthe seat belt extension.

i02429594

Seat Belt - ReplaceSMCS Code: 7327-510

Within three years of the date of installation or withinfive years of the date of manufacture, replace theseat belt . Replace the seat belt at the date whichoccurs first. A date label for determining the age ofthe seat belt is attached to the seat belt, the seat beltbuckle, and the seat belt retractor.


(1) Date of installation (retractor)(2) Date of installation (buckle)(3) Date of manufacture (tag) (fully extended web)(4) Date of manufacture (underside) (buckle)

Consult your Caterpillar dealer for the replacement ofthe seat belt and the mounting hardware.

If your machine is equipped with a seat beltextension, also perform this replacement procedurefor the seat belt extension.

i01898262

Service Brake Disc WearIndicator - CheckSMCS Code: 4255-535-IND

Reference: For information about checking the wearindicator for the service brake disc, refer to Testingand Adjusting, SENR1387, “950G Wheel Loader,962G Wheel Loader and IT62G Integrated ToolcarrierBraking System”.

i02405758

Steering Cylinder Bearings -LubricateSMCS Code: 4303-086-BD


154 SEBU7018-08Maintenance SectionSteering Pilot Oil Screen (Command Control Steering) - Clean/Replace


Wipe off the fittings before any lubricant is applied.

Open the access door on the right side of themachine. Apply lubricant through two remote fittings.These remote fittings lubricate the head end of thesteering cylinders.

Apply lubricant through the fittings on the rod ends ofboth steering cylinders.

There is a total of four fittings.

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Steering Pilot Oil Screen(Command Control Steering) -Clean/ReplaceSMCS Code: 4304-070-Z3; 4304-510-Z3

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up

Personal injury can result from working withcleaning solvent.

Because of the volatile nature of many cleaningsolvents, extreme caution must be exercisedwhen using them. If unsure about a particularcleaning fluid, refer to the manufacturer’s instruc-tions and directions.

Always wear protective clothing and eye protec-tion when working with cleaning solvents.


The screen group for the steering oil is located in thearticulation joint near the steering neutralizer valveon the right side.

1. Disconnect two hoses.


Steering Shaft (Command Control Steering) - Lubricate

2. Remove two connectors (2) from screen group (3).

3. Use an allen wrench to remove one screen fromeach opening of the screen group.

4. Wash the screens in a clean, nonflammablesolvent.

5. Dry each screen with pressure air. Inspect eachscreen for damage. Replace any damagedscreens.

6. Install the screens and tighten the allen headscrews until the screens are snug.

7. Install two connectors (2) and two hoses (1).

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Steering Shaft (CommandControl Steering) - LubricateSMCS Code: 4343-086-JF

S/N: 2JS1-Up

S/N: 3BS1-Up

S/N: 4BS1-Up

S/N: 5AS1-Up

S/N: 5RS1-Up

S/N: 6NS1-Up


1. Remove the steering shaft from the machine.

Reference: Refer to Disassembly and Assembly,SENR1392, “950G Wheel Loader, 962G WheelLoader and IT62G Integrated Toolcarrier MachineSystems” for the removal procedure and for theinstallation procedure.

2. Wipe off all of the fittings before any lubricant isapplied.

3. Apply 5P-0960 Molybdenum Grease throughfittings (1), (2), (3) and (4).

4. Apply 1P-0808 Multipurpose Grease throughfittings (5), (6), (7) and (8).

5. Install the steering shaft on the machine.

i02305841

Tire Inflation - CheckSMCS Code: 4203-535-AI


Always obtain proper tire inflation pressures andmaintenance recommendations for the tires on yourmachine from your tire supplier. Measure the tirepressure on each tire.

Inflate the tires with nitrogen , if necessary.

Reference: Refer to the “Tire Inflation Information”section of the Operation and Maintenance Manualfor more information.

156 SEBU7018-08Maintenance SectionTransmission Oil - Change

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Transmission Oil - ChangeSMCS Code: 3030-044




1. Operate the engine for a few minutes in order towarm the transmission oil.

2. Park the machine on a hard, level surface. Lowerthe bucket to the ground with a slight downwardpressure. Engage the parking brake and stop theengine.


Note: Remove the bolts (1) that hold the transmissionguard (2). Remove the transmission guard on theunderside of the machine in order to access themagnetic strainer.


3. Remove transmission oil drain plug (7). Allow theoil to drain into a suitable container. Clean thedrain plug and install the drain plug.

4. Remove four cover bolts and magnetic strainercover (3).

5. Remove suction screen (4) and tube (6) from thehousing. Remove three magnets (5) from the tube.

6. Wash the tube and the screen in a clean,nonflammable solvent.

7. Use a cloth, a stiff bristle brush or pressurized airto clean the magnets.

NOTICEDo not drop or rap the magnets against any hard sur-face. Replace any damaged magnets.

8. Clean the cover and inspect the cover seal.Replace the seal, if necessary.

9. Install three magnets (5) on the tube. Insertsuction screen (4) and tube (6) in the housing.

10. Install the cover and the cover bolts.

11.Replace the transmission oil filter.

Reference: Refer to Operation and MaintenanceManual, “Transmission Oil Filter - Replace” for thecorrect procedure.


Transmission Oil Filter - Replace


12. The filler tube for the transmission is located nearthe center hitch. Remove the filler cap (8) and fillthe transmission with oil.


13.Remove the transmission breather from the top ofthe transfer case. Wash the breather in a clean,nonflammable solvent. Install the breather.

14.Start the engine. Slowly operate the transmissioncontrols in order to circulate the oil.

15.Move the transmission control to the NEUTRALposition. Stop the engine. Inspect the transmissionfor leaks.

16.Check the transmission oil level. The sight gauge(9) is located near the filler tube. The transmissionoil should be at the mark (10) if the engine is off.The oil should be between marks (11) and (12)when the engine is idling.

Reference: Refer to Operation and MaintenanceManual, “Transmission Oil Level - Check” for thecorrect procedure.

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Transmission Oil Filter -ReplaceSMCS Code: 3067-510




1. Park the machine on a hard, level surface. Lowerthe bucket to the ground with a slight downwardpressure. Engage the parking brake and stop theengine.


2. The transmission oil filter is located on the left sideof the machine near the articulation joint. Use astrap type wrench to remove the transmission oilfilter. Dispose of the used oil filter properly.

3. Clean the filter mounting base. Remove all of theused filter gasket from the filter mounting base.

158 SEBU7018-08Maintenance SectionTransmission Oil Level - Check


4. Apply a thin coat of clean transmission oil to thegasket of the new filter element. Install the newfilter element by hand. When the gasket contactsthe filter mounting base, tighten the transmissionoil filter by an additional 3/4 turn.

5. Start the engine. Slowly operate the transmissioncontrols in order to circulate the transmission oil.

6. Move the transmission control to the NEUTRALposition. Inspect the transmission oil filter forleaks.

7. Check the transmission oil level.

Reference: Refer to Operation and MaintenanceManual, “Transmission Oil Level - Check” for thecorrect procedure.

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Transmission Oil Level - CheckSMCS Code: 3030-535-FLV


The sight gauge for the transmission oil level islocated on the left side of the machine near thearticulation joint.

1. Operate the machine for a few minutes in order towarm the transmission oil.

2. Park the machine on a hard, level surface. Put thetransmission control into the NEUTRAL position.Lower the bucket to the ground with a slightdownward pressure. Engage the parking brake.

Note: Before the machine is started, the transmissionoil level should be above “MIN START” mark (1) onthe upper end of the sight gauge.

3. Check the oil level while the engine is running atlow idle.

While the engine is running at low idle, thetransmission oil level should be between the “MIN”mark (3) and the “MAX” mark (2).

4. If necessary, remove the filler cap and add oil.


Transmission Oil Sample - Obtain

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Transmission Oil Sample -ObtainSMCS Code: 3080-008; 7542




1. Operate the machine for a few minutes beforeobtaining the oil sample. This will thoroughly mixthe transmission oil for a more accurate sample.


2. The sampling valve for the transmission oil islocated on the transmission oil filter base on theleft side of the articulation joint. Use the in-linesampling valve in order to obtain a sample oftransmission oil.


i01468974

Window Washer Reservoir -FillSMCS Code: 7306-544

NOTICEWhen operating in freezing temperatures, useCaterpillar or any commercially available nonfreezingwindow washer solvent.


Window Washer Reservoir – The windowwasher reservoir is located on the right sideof the machine. Fill the reservoir through

the filler opening.

i01469067

Window Wiper -Inspect/ReplaceSMCS Code: 7305-040; 7305-510


Inspect the wiper blades. Replace the wiper blades ifthe wiper blades are worn or damaged or if streakingoccurs.

160 SEBU7018-08Maintenance SectionWindows - Clean

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Windows - CleanSMCS Code: 7310-070


Use commercially available window cleaningsolutions in order to clean the windows. Clean theoutside windows from the ground unless handholdsare available.

Documents

Manual de Mantenimiento CAT 950G