AC-S-170,175

AAll ll iiss CChhaallmmeerrssService Manual

170 & 175

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF ALLIS CHALMERS OR IT’S SUCCESSORS. ALLIS CHALMERS AND IT’S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS..

Serv

ice

Man

ual

Make: Allis Chalmers Model: 170Years Made: 1968‐1973

HP‐PTO: 54.04 HP‐Engine:  HP‐Drawbar: 47.3 Year Beginning Serial Number

HP‐Range: 54Engine‐Make: PERKINS

Engine‐Fuel: DIESEL 1969 5374

Engine‐Cyl(s)‐CID: 4/236Transmission‐STD: CM

Optional:  1970 6369

Fwd/Rev Standard: 8/2Fwd/Rev Optional: 

Mfwd‐Std/Opt:  1971 6988

Tires‐Std Front: 7.50‐16Tires‐Std Rear: 18.4‐28

Wheelbase‐Inch: 95.5 1972 7797

Pto Type: LIVE Pto Speed: 540 CAT I‐3pt Hitch: False 1973 8821

CAT II‐3pt Hitch: TrueCAT III‐3pt Hitch: False

Hitch Lift: 

Hydraulics‐Type: OPEN Hyd‐Cap: 26 Hyd‐Flow: 18.3

Hyd Std Outlets: 1Cooling Capacity: 15

Fuel Tank Capacity: 18.5

Cab‐Stdm A/C; Rops:  Weight: 5304 New Price: 6887

Make: Allis Chalmers Model: 175Years Made: 1970‐1980

HP‐PTO: 62.47 HP‐Engine:  HP‐Drawbar: 55.2 Year Beginning Serial Number

HP‐Range: 62Engine‐Make: PERKINS

Engine‐Fuel: DIESEL 1970 1001

Engine‐Cyl(s)‐CID: 4/236Transmission‐STD: CM

Optional:  1971 1477

Fwd/Rev Standard: 8/2Fwd/Rev Optional: 

Mfwd‐Std/Opt:  1972 1624

Tires‐Std Front: 6.50‐16Tires‐Std Rear: 16.9‐28

Wheelbase‐Inch:  1973 1740

Pto Type: LIVE Pto Speed: 540 CAT I‐3pt Hitch: False 1974 2153

CAT II‐3pt Hitch: TrueCAT III‐3pt Hitch: False

Hitch Lift:  1975 3255

Hydraulics‐Type:  Hyd‐Cap:  Hyd‐Flow:  1976 3754

Hyd Std Outlets: Cooling Capacity: 

Fuel Tank Capacity:  1977 4809

Cab‐Stdm A/C; Rops:  Weight: 4992 New Price: 15894 1978 5670

1979 6321

1980 6999

Location MFG Color NameENTIRE TRACTOR LESS RIMS AND WHEELS ACPERSIANORANGE2FRONT AND REAR WHEELS ACCREAMFRONT AND REAR RIMS ACALUMINUM

Paint Codes 

FRONT OF TORQUE HOUSING FLANGE ON EITHER SIDE

FRONT OF TORQUE HOUSING FLANGE ON EITHER SIDE

http://www.jensales.com/products/allis-chalmers-tractor-service-manual-ac-s-170-175.html

Litho in U.S.A. 9003412

170 AND 175 DIESEL ENGINE

INDEX

CAMSHAFT ................................................ A·45 Inspection & Installation ................................... A-47 Removal ............................................... A·45 Tappets ................................................ A·47 Valve Timing ............................................ A·48

COOLING SYSTEM .......................................... A·58 Replacement Water Pump ................................. A·50a Thermostat & Testing ..................................... A·50 Water Pump ...... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A·58 Water Pump Disassembly ................................... A·59

CRANKSHAFT & MAIN BEARINGS .... , ........................ A·29 Crankpin Journals ........................................ A·33 End Play (Crankshaft) ..................................... A·31 Inspection of Crankshaft ................................... A·32 Installation of Crankshaft .................................. A·34 Main Bearing Journals ..................................... A·33 Oil Seal Replacement ..................................... A·35 Oil Seal Retainer, Removal & Installation ...................... A·35 Rear Crankshaft Oil Seals .................................. A·35 Regrinding Crankshaft ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A·33 Removal of Crankshaft ..................................... A-30

CYLINDER HEAD Connecting Rods ......................................... A·25 Cylinder Liners .......................................... A·27 Cylinder Head Gaskets ................................... A·22a Piston & Connecting Rod Assembly .......................... A·23 Piston Pins ............... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A·25 Piston & Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A·25 Reassembly ............................................. A·22 Removal, Disassembly & Inspection ....... : .................. A·17

ENGINE BALANCER ASSEMBLy ............................... A-49 Disassembly & Inspection .................................. A·52 Installation ............................................. A·54 Inverted l'ype Lubricating Oil Filter .......................... A·57 Lubrication Diagram ...................................... A·55 Oil Pump Removal, Disassembly ............................. A·55 Principle of Operation ..................................... A·50 Reassembly of Engine Balancer .............................. A·53 Removal of Engine Balancer ................................ A·51

ENGINE REMOVAL & INSTALLATION ......................... A·13

FLYWHEEL MACHINING .................................... A·37a

FLYWHEEL REMOVAL& INSTALLATION ...................... A·37

FUE L SYSTEM .............................................. A·51 Diassembly ............................................. A·52 Fuel Pump Timing ........................................ A·54 Priming Fuel System (D.P.A. Engine) ......................... A·55 Priming Procedure after Filter Change .......................... A·55 Reassembly ............................................. A·52 Removal ............................................... A·53 Trouble Shooting ........................................ A·55 Fuel Injection Test Data ........................... A·70 thru A·75 Fuel Injection Pump Repair ....................... A·77 thru A·104

170 ·175 Tractor A·1

Part No. 9004646 Mailing No.4 of 9003412

Part No. 9004646

170 AND 175 DIESEL ENGINE (Cont'd.)

INDEX

GENERAL INFORMATION 4.236 ENGINE A-12

LUBRICATING SYSTEM ................................... '" A-12

ROCKER ARM SHAFT ASSEMBLY Disassembly ... , .... " ...................•...•••......... A-15 Inspection & Service ...........•.................•.•...... A-15 Push Rods ....•...•..........................•.......... A-15 Reassembly & Installation ........................•...... '" A-15 Removal ................•.....................•.••..... A-14

SMOKE DIAGNOSIS CHART ......•.........••..•....•... A-68, A-69

SPECIFICATIONS ............•.•...••.......•........ A-3 thru A-ll

TIMING GEARS .....•...................•...•............... A-40 Balancer Idler Gear .....................................•. A-44 Camshaft Gear ........•...•. . . . . . . . . • . . . . . . • • . . . . . . . . . . .. A-43 Checking Timing Gear Backlash .................•........•.. A-41 Engine Idler Gear & Hub .....................•.•........... A-41 Injection Pump Drive Gear ..•...••.....•.........••........ A-43 Timing Gear Marks ...............................••...... A-40

TIMING GEAR COVER & FRONT CRANKSHAFT OIL SEAL I nstallation of Cover .......•......•..........•...•......... A-39 Oil Seal Injection .........•.........................•..... A-38 Removing Timing Gear Cover ..........................•.... A-38 Replacing Front Oil Seal ................................... A-38

TIMING GEAR HOUSING Installation .............................................. A-45

TROUBLE SHOOTING DIESEL ENGINE A-67

VLAVES Exhaust ............................•. ~ .......•.......•. A-18 Guides ................................................. A-l0 Intake ................................................. A-18 Removal & Inspection ..................................... A-19 Springs ............•................................... A-21 ValveSeats .........•................................... A-19 Valve Seat Inserts ....................•................... A-20

VALVE TAPPET CLEARANCE & ADJUSTMENT .........•........ A-16

Mailing No.4 of 9003412 170 - 175 Tractor

A-2 9003412

SPECIFICATIONS

Timing Gears (Continued) Camshaft Gear

Type of Gear. . • Helical Left Hand Number of Teeth • • • • • . • . 56 I. D. of Gear Boss 1.375"-1.376" O. D. of Camshaft Hub. • 1.3751" -1.3757" Fit of Gear to Camshaft. .0007"-.0009" Tight Located to Camshaft by Key & Retaining Screw. 45-50 lbs. torque

Crankshaft Gear . Type of Gear • • • • • • Helical Left Hand Number of Teeth . • . • . . • • . 28 I. D. of Crankshaft Gear. 1. 875" -l. 876"

Engine Idler Gear and Hub Type of Gear. • . Number of Teeth . • • Hub Diameter. • • • • Gear Bushing Bore Diameter (Reamed) Clearance Limit (Gear to Hub)

Fuel Injection Pump Gear Type of Gear. . • • • • • • • Number of Teeth • • • • •• I. D. of Fuel Pump Gear Bore O. D. of Gear Carrier • . • • • Clearanc e of Gear to Carrier.

Engine Balanc er Idler Gear

Number of Teeth . . • • Hub Diameter. . . . • • • Inside Bushing Diameter. • Bushing Clearance Limits •

Drive Shaft Number of Teeth • • ••

.Helical Right Hand · •••••• 63

1.996"-1.997" 1.9998"-2.0007"

.0028"-.0047"

Helical Left Hand · ..... . 56 · 1. ~25" -1.6262" 1.6238"-1.6225"

.0012"-.0037"

e , • • • • • 37 1.4984"-1.4990" 1.500 "-1.5016" 0.001 "-0.0032"

• • • . 14 Front Bearing Journal Diameter •••• • .1.2484"-1.249"

1.2510"-1.2526" 0.002"-0.0042"

0.9987"-0.9992" 1.001"-1.0022"

0.0018"-0.0035"

Front Bushing Bore Diameter (finished) • Bushing Clearance Limits . . • • • • • Rear Bearing Journal Diameter. • • • • Rear Bushing Bore Diameter (finished) Bushing Clearance Limits • . • • • • •

Driven Shaft Front Bearing Journal Diameter ••• Front Bushing Bore Diameter (finished) Bushing Clearance Limits . • • ••• Rear Bearing Journal Diameter. • • • Rear Bushing Bore Diameter (finished) Bushing Clearance Limits ••

Balanc e Weight Gear Backlash • • • • •

COOLING SYSTEM Radiator Pressure Cap .•... Fan Belt Deflection . . . . Water Pump Impeller Clearance Thermostat Opening Temperature

Water Pump Type ........... . Pump Delivery - Engine RPM. U.S. Gals. IMin. Litresl Min. .... Water Pump Position.

170 Tractor

Litho in U. S. A. A-7

• 1. 2484" -1. 2490" 1.2510"-1.2526" 0.002"-0.0042"

•• 0.9987"-0.9992" 1.001"-1.0022"

• 0.0018"-0.0035" 0.005"-0.008"

· . . . 7 PSI 1/ 2" to 3/4"

· 0.015"-0.035" 168o F. to 176o F.

• . Centrifugal 1200 2000 2500 · 11 20 25 · 65 113 140

· On Cylinder Block

F.,E. S. M. Suppl. No. 62

..

SPECIFICATIONS

ENGINE OVERHAUL TORQUE (Cont'd)

Timing Case Section (Cont'd)

Setscrew, timing case front cover to timing case .•..•.•.•

Setscrew, timing case front cover to timing case (Aluminum washer s) .

Setscrew, inspection cover to front cover

Lub. Oil Pump and Sump Section Capscrew, delivery pipe flange to

delivery housing . . . . • . . Capscrew, suction pipe flange to lub.

oil pump housing . • • . . . . . Capscrew, suction pipe flange to strainer Capscrew, oil pump to balancer unit Nut, dipstick tube retaining . . . . • Setscrew, lube oil sump to cyl. block. Setscrew, lub. oil sump to timing case

Cylinder Head Section Setscrew, rear end cover to cyl. head. • Setscrew, rear lifting plate to cyl. head. Nut, water outlet body reta.ining Setscrew, water outlet body to cyl. head,

also secures front lifting plate. Setscrew, water outlet body to cyl. head Nut, water outlet body to outlet connection. Nut, rocker shaft bracket to cyl. head Nut, exhaust manifold retaining . . . . Setscrew, induction manifold to cyl. head

Cylinder Head Cover Section Screw, cyl. head cover to cyl. head

Water Pump Section Nut, water pump front half to rear half Nut, water pump pulley retaining. . Setscrew, fan to water pump pulley.

Fuel Inj ection Equipment SectioI} Setscrew, driving gear to fuel pump Setsc rew, fuel oil filter to c yl. head

170 Tractor

F. E. S. M. Suppl. No. 62 A-I0

Size

5/16" UNF

5/16" UNF 5/16" UNF

1/ 4 " UNF

5/16" UNF 1/4 " UNF

9/16"UNF 5/16" UNF 5/16" UNF

5/16" UNF 3/8 " UNF 3/8 " UNF

3/8 " UNF 5/ 16" UNF 3/8 " UNF 7/16" UNF 3/8 " UNF 3/8 " UNF

1/4 " UNC

5/16" UNF 1/ 2 " UNF 5/16" UNF

5/16" UNF 3/8 " UNF

Torque Lbs. Ft,

12-15

6-15 4-5

6-1/2 - 7-1/2

12-15 4-5

19-21 12-15 12-15 12-15

12-15 21-24 21-24

21-24 12-15 21-24 28-32 12-15 21-24

5-9

12-15 50-55 12-15

19-21 21-24

Fig. 38 (Engine Idler Gear - Identification of Parts)

1. Idler Gear Retaining Plate 2. Idler Gear Bushing Halves 3. Engine Idler Gear 4. Timing Gear Housing 5. Idler Gear Hub

Inspection

Carefully clean and inspect all parts. Make sure that the oil holes in the idler gear hub and cylinder block are open and clean.

New specifications are as follows:

Idler Gear: Bushing Bore Diameter

(Finished) .••• Gear End-Play.

Idler Gear Hub: Hub Diameter

1. 9998- 2.0007" 0.003- 0.007"

1. 996-1. 997" Running Clearance

(Gear-to-Hub) •• • ,0.0028-0.0047"

If the flanged idler gear bushings are worn, remove the bushing half from each side of the gear, then install new bushings and ream them to an inside diameter of 1. 998- 2.0007".

Installing The Engine Idler Gear and Retiming the Engine

To install the engine idler gear and retime the engine with camshaft gear, injection pump drive gear and crankshaft gear installed, proceed as follows:

1. If the hub was removed, clean the hub and the housing thoroughly, then carefully tap it into place, using a wooden block.

Fig. 39 (Removing or Installing Engine Idler Gear)

NOTE: Due to the offset holes, the idler gear hub can be installed in only one position.

2. Turn the crankshaft until the keyway in the crankshaft gear is straight up (No. 1 and 4 pistons at T. D. C.).

3. With the rocker arm shaft assembly re­leased, rotate the camshaft gear and the in­jection pump gear until their timing marks are approximately aligned with the center line of the idler gear hub.

4. Install the idler gear as shown in Fig. 39, so that its three timing marks align with those on the crankshaft gear, injection pump gear and camshaft gear.

5. Make sure that all timing marks are aligned, as shown in Fig. 34, then install the idler gear retainer and self-locking nuts. Tighten the idler gear nuts to 21-24 ft. lbs. torque.

NOTE: If idler gear end-play exceeds 0.007" install a new retainer.

6. Secure the rocker arm shaft assembly in place and adjust the valve clearance, then complete reassembly.

170 Tractor

F. E. S. M. Supple No. 62 A-42

170 AND 175 GASOLINE ENGINE

ADJ UST MENT S Carburetor Valve Lash .

COOLING SYSTEM Water Pump & Fan

CRANKSHAFT Bushings Flywheel

CYLINDER Block •. Head .. Head & Valves Liner s . .. . . Piston & Rings

DISTRIBUTOR. . Assembly ... Automatic Advance Disassembly .. Ignition Ass embly . Timing ..... .

INDEX

FITS & TOLERANCES MODEL G-226 ENGINE

GOVERNOR ..... . Linkage

LUBRICATING SYSTEM

OIL FLOW DIAGRAM. OIL PUMP .... . OIL SUMP ..... .

PISTON & CONNECTING ROD

ROCKER ARM & SHAFT

SPARK PLUGS ..... SPECIFICATIONS

THERMOSTAT HOUSING & THERMOSTAT TIMING GEAR COVER & GOVERNOR LINKAGE TORQUE SPECIFICATIONS

VAL VES & ROCKER ARMS

Litho in U.S.A 170 - 175 Tractor

B-1

B-45 B-46

B-35 B-33 B-26 B-27 B-26

B-38 B-20 B-21 B-24

• B-24

B-40 B-44 B-43 B-43 B-43 B-42

B- 3

B-31 B-30

B-13

B-12 B-15 B-14

B-23

B-19

B-39 B- 2

B-3? B-30 B-11

B-18

9003412

170 AND 175 TRACTOR

INDEX

AXLE SHAFT & GEAR INSTALLATION

BRAKE (Removal & Installation)

DIFFERENTIAL (Removal & Installation)

ENGINE C LUT CH • • . . . . . ENGINE CLUTCH FRONT SHAFT (Hyd. Pump Drive) ENGINE CLUTCH SHAFT .....

FINAL DRIV E. .'. • . . . . . . FRONT AXLE (Single Front Wheel) FRONT END WEIGHT ..... . FRONT POWER TAKE OFF SHAFT FRONT SUPPORT (Power Steering) FRONT WHEEL (For Dual & Roll Shift Front Axle)

HOLLOW CLUTCH SHAFT . . . . . . . HYDRAULIC PUMP DRIVE & MOUNTING

IDLER SHAFT & GEAR. . . . . . INTERMEDIATE SHAFT & GEARS

OIL PUMP (Power Director) . . .

PEDEST AL & SPINDLE (Dual Front Wheels) POWER DIRECTOR CLUTCH POWER STEERING RAM. .

ROLL SHIFT FRONT AXLE

SPECIFICATIONS OF TRANSMISSION PARTS SPINDLE & TIE ROD (Roll Shift Front Axle)

TORQUE HOUSING ....... . TORQUE HOUSING INSTALLATION. TORQUE SPECIFICATIONS (Tractor)

. .'

• C-61

· C-39

.C-45

· C-17 .C-22 · C-21

.C-58 · C-15 C-2A,3

· C-26 .C- 8 .C- 5

.C-25 · C-24

· C -28 .C-30

.C-32

• C -12 · C-33 · C-11

· C- 6

.C-55 · C- 7

· C-19 · C-31 • C- 2

TRACTOR EQUIPPED WITH HIGH CLEARANCE FINAL DRIVE. TRANSMISSION COUNTER SHAFT. . . . .

· C-63 · C-53 • C-41 · C-43 .C-45 .C-47

TRANSMISSION & DIFFERENTIAL HOUSING TRANSMISSION GEAR SHIFT ; TRANSMISSION SHIFT COVER TRANSMISSION MAIN SHAFT. TRANSMISSION (175) WHEEL (Single Front) . . . .

Litho in U.S.A. 170 Tractor

C-l

'. •• 'C-64, 65, 66 .. C-14

F. E. S. M. Suppl. No. 72

Power Steering Ram 175 Tractor Prior to SIN 2035 170 Tractor Prior to SIN 7500

3

1. Gear Rack 2. C-Ring Seal 3. Guide Assembly 4. C-Ring Seal 5. Back-Up Ring 6. C-Ring Seal 7. Sealing Ring

REMOVE STEERING RAM FROM TRACTOR

It is not practical to remove the steering ram assembly by removing the tractor side frame, as there would be difficul­ty retiming steering gear with gear rack. Therefore, remove the front support assembly from tractor, and refer to the disassembly and assembly procedures.

DISASSEMBLE STEERING RAM

Remove the retaining flange from cylinder assembly. Re­move pin attaching the gear rack to piston rod assembly. Remove the piston rod guide assembly from cylinder. Re­move piston and rod assembly from cylinder. Remove and replace D-ring seals.

.. -~

13

8. C-Ring Seal 9. Piston - Rod Assembly

10. Wear Ring 11. Snap Ring 12. Cylinder Assembly 13. Retaining Flange 14. Pin

ASSEMBLE STEERING RAM

Thoroughly clean and lubricate inside of cylinder assem­bly. Install D-ring seal in groove of piston assembly and in­stall sealing ring over D-ring. The wear ring seldom needs replacing.

Remove seal and back-up ring from inner groove of guide assembly. Install back-up ring in front position of groove, then install D-ring in rear position. Install D-ring in groove at outer diameter of guide. Lubricate seal rings and care­fully assemble piston rod through guide assembly. Care­fully install this assembly to cylinder. Attach gear rack to piston rod with head end of pin on tooth side of gear rack. Retain pin by peening, being careful not to deflect the ears of rod.

Litho in U.S.A. 170 - 175 Tractor

C-II 9003412

ONE SEVENTY TRACTOR HYDRAULICS

INDEX

CONTROL VALVE INLET SECTION Assembly of Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... D-5 Disassembly of Relief Valve ............................................. D-5 Operation of Relief Valve . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .. D-.6

HYDRAULIC PUMP ..................................... : ................. D-2 Assembly ............................................................ D-3 Disassembly. . . . ....... '. . . . . . . . . . . . . . . . . . . . . .......................... D-3 Triple .............................................................. D-3 Front Mounted ...................................................... D-6a

LIFT AND "TRACTION BOOSTER" SySTEM ................................. D-15 Lift Arm Cylinder ................................................... D-14f

POWER STEERING OIL FLOW ............................................. D-12 POWER STEERING VALVE .............................................. D-14a PRESSURE RELEASE FOR DETENT - SELF·CANCEL ........................... D-9

REMOMTE RAM SECTION (Double Acting, Remote with Float Position) Assembly ............................................................ D-7 Removal & DiiiiaSsembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... D-7

SECTIONAL CONTROL VALVE ............................................ D-16 Float Position ....................................................... D-17 Inlet Section ........................................................ D·16 Lift Position ........................................................ D·16 Lowering Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... D-16 Remote Ram Section - Hold Position ..................................... D-16 Sensing Valve Section ................................................. D-19 Tractor Ram - Lift Position ............................................. D-IB Tractor Ram - TRACTION BOOSTER Position ............................. D-IB Tractor Ram Section - Hold Position ...................................... D-17

TESTING POWER STEERING SYSTEM FOR PUMP VOLUME AND RELIEF VALVE PRESSURE ...................................... D-13 O.T.C. Hydraulic Tester ............................................... D-13

"TRACTION BOOSTER" SENSING VALVE AND OUTLET SECTION .................................................. D-II

TRACTOR RAM SECTION ................................................ D-lO

Litho in U.S.A. 170 Tractor

D-1 9003412

REMOTE RAM SECTION Double Acting, Remote With Float Position

22

J 1. 2. 3. 4. 5. 6. 7.

O-Ring, 2-15/64" Check Valve Poppet Check Valve Spring Seal Plate Wiper Seal O-Ring, 9/16"x3/32" W. Val ve Housing

8. 9. 10. 11. 12. 13. 14. 15.

Valve Plunger Poppet Valve Cam, Detent Detent Spring Spring Guide Spring

16. Sleeve Washer 1 7. Plunger Spring 18. O-Ring 19. Screw Assy. 20. Adjusting Screw 21. Plunger Cap

O-Ring, 3/4"1. D. x 3/32"W. Plunger Sleeve

22. Rubber Plug 23. Spacer

REMOVE AND DISASSEMBLE

If it becomes necessary to disassemble any of the valve sections, remove the valve stack from tractor. Thoroughly clean valve and oil line connections before di sconnecting lines. Cap all line connections. Remove valve stack from tractor. Remove tie bolts from valve stack and separate all sections. Remove and replace all O-ring seals between sections. Use caution while separating sections so the check valve spring and poppet do not become lost or misplaced.

Clean or remove any paint from lever end of valve plunger. Remove the two screws and spacers attaching plunger cap to valve hous­ing. Grasp the plunger spring and slide the plunger assembly from valve housing. The plunger spring is somewhat easier to remove or replace by providing a fixtur e of some sort that will hold the spring at its compressed length. Remove adjusting screw (Item 20) and shake out spring (Item 13) and spring guide (Item 12).

Remove screw assembly (Item 19) retaining the plunger centering spring. Remove spring

and washer (Item 16). Carefully slide the plunger sleeve from plunger and gently re­lease the four detent balls (3/16" Dia.) so they do not become lost. Dump the detent spring (Item 11); detent cam (Item 10) and poppet valve (Item 9) out in palm of hand. The O-ring seal inside of plunger sleeve is the same part as Item 6. Remove seal plate (Item 4) to replace wiper seal (Item 5) and O-ring seal (Item 6).

ASSEMBLE REMOTE RAM SECTION

Place the stern end of poppet valve (Item 9) through detent cam (Item 10) and insert into end of valve plunger. Holding valve plunger in a horizontal position, place detent spring (Item 11) on the spring seat end of detent cam (Item 10) and use spring to push parts into place in valve plunger.

Replace. O-ring seal (Item 6) inside plunger sleeve (Item 15) and place sleeve over end of plunger. Do not cover the four holes for the detent balls. Place the four detent balls in the four holes in plunger (using Lubriplate to retain balls if necessary), and slide the sleeve over the detent balls (3/16" Dia.). By holding

Litho in U.S.A. 170 Tractor

D-7 F.E. S.M. Suppl. No. 62

PRESSURE RELEASE FOR DETENT - SELF-CANCEL

PLUNGER DETENT SLEEVE

DETENT BALL

DETENT SPRING

PRESSURE PASSAGE

DETENT CAM

VALVE SPRING

Under normal working conditions, the poppet valve stays on its seat in plunger. The pres­sure passage at center of plunger is connected with the tractor ram passage when control valve is in the lift position. In case of re­mote ram valve, this pressure passage is connected to ram passage, both in lift or lower position.

With the plunger in the neutral or hold posi­tion' the detent balls are midway between the detent notches in sleeve. The plunger cen­tering spring positions and keeps the plunger in the neutral position. The sketch shown is for a double acting remote ram valve.

When the plunger is moved, either to the lift or the lowering position, the detent balls en­gage the detent notches in sleeve. The detent

spring pressure against the detent cam holds these balls in this engaged position. When the ram reaches the end of its stroke, the pres­sure build-up unseats the poppet valve in the plunger. This permits oil pressure to force the detent cam against the detent spring, com­pressing the spring.

As the oil pressure forces the detent cam against the detent spring the detent balls are released from the notches in the detent sleeve. This permits the centering spring to move the plunger to the neutral position and the self­canceling function has been accomplished. The adjusting screw at end of plunger increases or decreases the pressure on the poppet valve spring. If the valve does not self-cancel at rated engine speed, slowly back out screw a small amount at a time until it does.

Litho in U.S.A. 170 Tractor

D-9 F.E. S.M. Suppl. No. 62

TRACTOR RAM SECTION

7

~ 1

1. Check Valve Spring 10. Valve Assy. 19. Sleeve Washer 2. Check Valve Poppet 11. Plunger 20. Plunger Spring 3. O-Ring, 2-15/64" 12. Poppet 21. Screw Assy. 4. Seal Plate 13. Cam 22. Adjusting Screw 5. Wiper Seal 14. Spring Guide 23. Plunger Cap 6. O-Ring 15. Spring 24. Rubber Plug 7. Valve Housing 16. Detent Spring 25. Spacer 8. Valve Stem Assy. 17. O-Ring, 3/4" 26. Socket Head Capscrew 9. Valve Stem O-Ring 18. Sleeve

To disassemble or assemble this section of valve stack, refer to information for the re­mote ram section. The internal parts of these two sections are similar and the dis­assembly or assembly would be the same.

Item 8 is the adjusting valve (screw) for set­ting the rate of lower. This is done with the valve in the TRACTION BOOSTER position. To lower slower, turn valve in. To lower faster, turn valve out. Item 10 is a valve assembly used to seal off the tractor ram passage from the sump passage.

Item 22 is the self-canceling adjusting screw. If the valve self-cancels before the ram is extended, or if the valve does not self-cancel, adjustment of this screw is necessary.

With the engine operating at 1800 RPM, and valve self-cancels before the ram extends (before the load is raised), turn screw clock­wise a small amount at a time until the ram extends. If the valve does not self-cancel, turn screw counter-clockwise a small a:rn.ount at a time until it does self-cancel.

F.E. S.M. Suppl. No. 62 170 Tractor

D-I0

TRACTION BOOSTER, SENSING VALVE & OUTLET SECTION

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1. Outlet Section

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2. O-Ring, 2-15/64" 3. Check Valve Spring 4. Check Valve Poppet 5. Seal Plate 6. Wiper Seal 7. O-Ring, 9/16" 8. Valve Stern Assy.

DISASSEMBLE VALVE

10

To disassemble any of the valve sections, the valve stack should be removed from tractor, and the line connections capped or plugged. Thoroughly clean valve stack before remov­ing the tie bolts. Remove the plunger cap (Item 15). spacer (Item 14) and plunger spring (Item 13). Grasp end of plunger and gently slide from valve housing.

The seal plate, wiper seal and O-ring seal will be removed with plunger. Remove the capscrew and spring seat from plunger, if replacement of parts are neces sary. Re­move seal plate, wiper seal and O-ring seal from opposite end of housing. Try the fit of plunger in housing bore for freedom of travel. There should not be any binding or tight spots.

The plunger bore in housing is honed to a dia­meter of .56295" to .56325". The outside diameter of plunger after chrome plating is . 56240" to .56255". This provides a plunger to housing clearance of .00040" to .00085". If plunger binds in housing bore, polish the bore or plunger surfac e until fr ee of all bind­ing.

27 . \ 28 29 .. i J. 31 28 31

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9. Housing Section 10. Sens ing Plunger 11. Spring Seat 12. Socket Head Capscrew 13. Plunger Spring 14. Spacer 15. Plunger Cap 16. Relief Valve Assy.

ASSEMBLE VAL VE

Place the O-ring seal (Item 7), wiper seal (Item 6) and seal plate (Item 5) over end of plunger having the threaded hole. Place the spring seat (Item 11) over end of plunger and install the socket head capscrew and tighten. Enter plunger assembly through bore of hous­ing. With all spool sections hidden within valve housing, slide the O-ring and wiper seal into counterbore of housing and position the seal plate (Item 5).

Place spacer (Item 14) inside of plunger cap (Item 15) and insert spring (Item 13) into cap. Center opposite end of spring over spring seat, compress spring and install the two socket head capscrews (1/ 4" x 3/4") and tighten. In­stall o-ring seal, wiper seal and seal plate at opposite end of valve housing.

When assembling the valve stack together, be sure the check valve poppet (Item 4), check valve spring (Item 3) and the O-ring seals are all in place. Torque the nuts on the two 5/16" tie rods to 14 ft. lbs., and on the 3/8" tie rod to 33 ft. Ibs.

Litho in U.S.A. 170 Tractor

D-ll F.E. S.M. Suppl. No. 62