Servic

e M

an

ual

Service Manual

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF

MASSEY HARRIS MASSEY FERGUSON OR IT’S SUCCESSORS. MASSEY HARRIS MASSEY FERGUSON 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.

MF50C

Industrial

Tractor, Loader &

Backhoe

MH-S-MF50C TLB

Form No. 1448789 M1

MF 50C TRACTOR/LOADER/BACKHOE

CONTENTS

PART 1 - Important Procedures And Data

PART 2 - Front Axle And Steering

PART 3 - Engine

PART 4 - Clutch

PART 5 - Transmission

PART 6 - Drive Axle And Brakes

PART 7 - PTO

PART 8 - Internal Hydraulics

PART .9 - Electrical System

PART 10 - Loader & Backhoe

Printed in U.S.A.

SAFETY PRECAUTIONS

IMPORTANT PROCEDURES AND DATA

CONTENTS

PAGE

2

ROLL OVER PROTECTIVE STRUCTURES (ROPS) and/or SAFETY FRAMES ............... , .. ........ .. 3

SERVICE PROCEDURE RECOMMENDATIONS ...................................................... 4

SPECIAL TOOLS ................................................................................. 5

TIGHTENING TORQUE RECOMMENDATIONS (GENERAL GUIDE) ......................... " . .. .. . . ... 5

PRODUCT CROSS REFERENCE FOR SEALANTS AND METHOD OF APPLyiNG........................ 6 Liquid Locking Metal Sealants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

"CONVERTING UNITS OF WEIGHTS AND MEASURES ............................................... 10 Definition of Terms and Selection of Units ....................................................... 10 "Rounding-Off" Converted Units ................................................................ 14 Conversions Between Units ..................................................................... 15

CONVERSION TABLES ............................................................................ 18 How to Use Conversion Tables .................................................................. 18 Table 1 - Inches and Miilimetres, Celsius and Fahrenheit ........................................ 19 Table 2 - Tightening Torques (ft.lbs to kg.m) - NOT "SI" ......................................... 20 Table 3 - Tightening Torques (kg.m to ft.lbs) - NOT "SI" .......................................... 20 Table 4 - Area (Square Inches to Square Centimetres) ........................................... 20 Table 5 - Area (Square Feet to Square Metres) .................................................. 21 Table 6 - Bending Moment or Torque (Inch Pounds to Newton Metres) ............................ 21 Table 7 - Bending Moment or Torque (Foot Pounds to Newton Metres) ............................ 21 Table 8 - Bending Moment or Torque (Kilogram-force-metre to Newton Metre) ..................... 22 Table 9 - Force (Pounds-force to Newtons) ...................................................... 22 Table 10- Length (Microinches to Micrometres) ................................................. 22 Table 11 - Length (Hundredths of an Inch to Millimetre) .......................................... 23 Table 12 - Length (Inches to Millimetres) ....................................................... 23 Table 13 - Mass (Pounds to Kilograms) ......................................................... 23 Table 14 - Power (Horsepower to Kilowatts) ..................................................... 24 Table 15 - Pressure or Stress (Pounds Per Square Inch to Kilopascals) ............................ 24 Table 16 - Volume or Capacity (Cubic Inches to Cubic Centimetres) ............................... 24 Table 17 - Volume or Capacity (Cubic Inches to Litres) ........................................... 25 Table 18 - Volume or Capacity (Cubic Feet to Cubic Metres) ...................................... 25 Table 19 - Volume or Capacity (Cubic Yards to Cubic Metres) ..................................... 25 Table 20 - Volume or Capacity (U.S. Fluid Ounces to Cubic Centimetres) .......................... 26 Table 21 - Volume or Capacity (U.S. Liquid Pints to Litres) ......................... '" ............ 26 Table 22 - Volume or Capacity (U.S. Liquid Quarts to Litres) ...................................... 26 Table 23 - Volume or Capacity (U.S. Liquid Gallons to Litres) ..................................... 27

-1- IMPORTANT PROCEDURES AND DATA

SERVICE PROCEDURE RECOMMENDATIONS

The service repair procedures recommended within the various parts in this Manual are usually written assuming that the assembly to be repaired has been removed from Tractor. However, much of the servicing can be performed without complete removal of assembly ... it will require judgment of serviceman to determine necessity of removal, while taking into consideration, degree and extent of servicing required.

Following important points should be remembered and practiced.

TROUBLE-SHOOT AND CLEAN TRACTOR BEFORE DISASSEMBLY. If possible, make a complete diag­nosis to determine extent of repair which should be performed. Take all precautions as necessary to prevent dirt or other foreign material from entering hydraulic, fuel and air system.

DO NOT MIX PARTS. Be alert during disassembly to detect presence of special parts which should not be interchanged.

INSPECT PARTS DURING DISASSEMBLY AND CLEAN THOROUGHLY.

LABEL PARTS AND PROTECT PRECISION OR MACHINED SURFACES.

DO NOT SUBSTITUTE PARTS. THE USE OF NON­RECOMMENDED SUBSTITUTE REPLACEMENT PARTS MAY BE A SOURCE OF ADDED TROUBLE. Do not assume that if parts look alike, they are the same.

The majority of parts have special properties known only by the manufacturer. They are the result of particular requirements established by extensive research and testing of complete Tractor through combined efforts of MF's engineering research and MF's service department field experience. There is a continual program to further improve existing parts.

Many of these improvements cannot be detected by visual examination between old and new items. Therefore, it is extremely important that only gen­uine MF replacement parts be used to repair an MF Tractor.

-4-

PART 2 - FRONT AXLE AND STEERING

CONTENTS

PAGE TESTING AND TROUBLE-SHOOTING..... .................. .................. ...................... 2

Checking Pump Pressure.............. ....................... .................................. . 2 Filling and Removing Air From System ........................................................... 2

ENGINE DRIVEN STEERING PUMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Servicing ............................................................................. Refer to CS-18

STEERING CONTROL UNIT ........................................................................ 4 Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Servicing .................................................. " ......................... Refer to CS-21

STEERING CyLINDERS............................................................................ 5

WHEEL BEARINGS AND SEAL ......... _.................................... .... . .................. 7

SPINDLE BUSHINGS AND SPiNDLE...... .......................................................... 9

STEERING AXLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

AXLE SUPPORT CASTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12 Pivot pin Bushings ............................................................... , .............. 12

CS-18 2nd Issue ENGINE DRIVEN STEERING PUMP (Parker Hannifin) CS-21 1st Issue STEERING CONTROL UNIT

This Part contains three separate sections, each beginning with Page 1 and Figure 1.

CAUTION: To avoid personal injury, use positive acting jacks, hoists and secure blocking when raising, lowering or supporting Tractor, Loader, Backhoe and components.

Refer to Loader and Backhoe Parts in this man­ual for additional precautions.

-1- MF SOC - FRONT AXLE

TESTING AND TROUBLE-SHOOTING

FIG. 1

CHECKING PUMP PRESSURE

1. Set parking brake, then lower loader and back­hoe to ground (or use supports and lock pins).

2. Connect a 2000 psi (minimum range) gauge into pressure line, (upper port on pump body), Fig. 1 with D31 adapter, 1,DS.1 'T',2,andD19 HP hose assembly, 3.

3. Check oil level in reservoir, run engine, turn wheels against stop to blow relief valve. Take read­ings (oil at 1500 F.)

a. At 2000 engine rpm, 1650 psi. b. At 500 engine rpm, 1100 psi. Stop engine, dis­

connect gauge and reconnect lines if pressure is satisfactory. Refill reservoir. 4. Approximate flow at 2000 engine rpm is 5.S

gpm and .9 gpm at SOD rpm.

NOT.E: These flow rates are for pumps in new condition. Used pumps may be expected to have flow rates of 4.5 and.7 gpm.

5. Pump relief valve is adjustable. Turn clockwise to increase pressure, counterclockwise to decrease. Refer to Fig. 2. Tighten lock nut. Replace valve if cor­rect setting cannot be made.

SYMPTOM CHART

Symptom

Manual but no power steering ....... . No steering action .................. . Hard steering action ................. . Excessive free-play in steering wheel .............................. . Foaming oil ......................... : Slow, erratic steering action ......... . Power but no manual steering ....... . Steering wheel has a "kick-back" .... .

See Possible Cause

A A.C,D,E A.B,D,E

B,C,D B,C,F A.B,D

D,E G

FIG. 2

POSSIBLE CAUSES OF STEERING SYSTEM MALFUNCTIONS

A. Inoperative or malfunctioning steering pump. Re­pair or replace pump. B. Low or improper type oil. Fill to filler opening. C. Air in system. Replace faulty hoses or tighten con­nections. D. Inoperative or malfunctioning hydrostatic hand pump. Repair or replace hand pump. E. Steering pump relief valve dirty, worn or improp­erly adjusted. Correct as necessary. F. Air leaking into suction line. Tighten connection. G. Hydrostatic hand pump improperly timed. Time as instructed.

FILLING AND REMOVING AIR FROM SYSTEM

1. Fill pump reservoir with lubricant such as Per­matran®.

2. If lines, steering control unit and cylinders are dry, crank engine, but do not start engine to begin filling system. Refill reservoir and repeat.

NOTE: Never operate starter motor more than 30 seconds at a time without pausing to allow it to cool for at least two minutes. Overheating, caused by excessive cranking will seriously damage starter motor.

3. Set brakes, start engine, run at idle briefly while turning steering wheel left and right to stops. Do not blow relief valve. Stop engine, refill reservoir, restart and repeat turning and refill procedure until oil level remains at bottom of filler plug.

4. Check for leaks.

-2-

PART 3 - ENGINE

CONTENTS

PAGE PAGE INTRODUCTION

General Information ...................... . Engine Serial Number .................... .

2 2 2

SPECIFICATIONS ........................... 3 General Specifications .................... 3 Tightening Torques ....................... 3 Engine Overhaul Specifications ............ 4 Lubrication System Specifications ......... 7 Fuel System Specifications ................ 7 Cooling System Specifications ............. 8

ENGINE REMOVAL AND INSTALLATION ............................. 9

Removing Engine ......................... 9 Installing Engine .......................... 11

CYLINDER HEAD ............................ 13 Removing Cylinder Head .................. 13 Disassembling Cylinder Head .............. 13 Cylinder Head Inspection and Servicing ............................. 13 Valve Guides ............................. 14 Valves and Valve Seats .................... 15

Servicing Valves and Valve Seats ........ 15 Installing Valve Seat Inserts ............. 15

Valve Springs and Valve Stem Seals ....... 16 Rocker Arm Shaft Assembly ............... 17

Disassembling Rocker Arm Shaft Assembly ......................... 17 Replacing Rocker Arm Bushings ......... 17 Reassembling Rocker Arm Shaft Assembly ......................... 17

Reassembling Cylinder Head .............. 18 Installing Cylinder Head ................... 18 Retorquing Cylinder Head ................... 19 Adjusting Valve Lash ...................... 19

PISTONS AND CONNECTING RODS ......... 20 Removing Piston/Connecting Rod Assembly ............................ 20 Separating Piston From Connecting Rod ........................... 20 Connecting Rods .......................... 20

Connecting Rod Alignment .............. 20 Replacing Piston Pin Bushings ........... 20

Pistons and Rings ......................... 21 Pistons ................................. 21 Piston Rings ............................ 22

Rejoining Piston to Connecting Rod ........ 23 Installing Piston/Connecting Rod Assembly ............................ 23

CYLINDER BLOCK AND LINERS .............. 24

Inspecting and Servicing Cylinder Block and Liners .......................... 24 Replacing Cylinder Liner .................. 25

CRANKSHAFT AND MAIN BEARINGS ........................... 26

Crankshaft End-Play ....................... 26 Checking Crankshaft End-Play ............ 26 Replacing Thrust Washers ............... 26

Removing Crankshaft ..................... 27 Inspecting Crankshaft ..................... 27 Regrinding Crankshaft ..................... 27 Installing Crankshaft ...................... 28 Rear Crankshaft Oil Seal ................... 29 Replacing Oil Seal ......................... 29 Installing Oil Seal Retainer ................. 30

FLYWHEEL ................................. 31 Replacing Ring Gear ...................... 31 Installing Flywheel ........................ 31

TIMING CASE AND DRIVE ................... 33 Timing Gear Case ......................... 33

Tachometer Drive ....................... 33 Replacing Front Crankshaft Oil Seal ................................ 33 Installing Timing Gear Cover ............ 33 Removing Timing Gear Housing ......... 34 Installing Timing Gear Housing .......... 34

Timing Gears ............................. 34 Timing Gear Backlash and End-Play ...... 35 Removing Timing Gears ................. 35 Replacing Idler Gear Bushings ........... 36 Installing Timing Gears and Retiming Engine .................... 36

Camshaft ................................. 37 Camshaft End-Play ...................... 37 Removing Camshaft and Tappets. . . . . . . .. 37 Inspecting Camshaft, Bushing, Thrust Washer, and Tappets .................... 37 Installing Camshaft and Tappets ......... 38

Checking Valve Timing .................... 38

ENGINE BALANCER ASSEMBLY .............. 39 Balancer Idler Gear Backlash and End-Play .................... 39 Removing and Disassembling Balancer .................................. 39 Servicing Balancer Bearings ............... 40 Reassembling Balancer .................... 41 Installing and Retiming Balancer ........... 41

-1- MF 50C - ENGINE

PAGE PAGE

LUBRICATION SYSTEM ..................... 43 Adjusting Fuel Shut-Off Oil Pan ................................... 43 Control ............................... 49

Removing Oil Pan ....................... 43 Adjusting Engine Speed ................ 50 Installing Oil Pan ........................ 43 Adjusting Throttle Linkage .............. 50

Oil Pump ................................. 43 Fuel Injectors ............................ 51 Removing and Disassembling Removing Injectors .................... 51 Oil Pump ............................... 43 Testing Injectors ....................... 51 Inspecting Oil Pump .................... 43 Disassembling Injectors ................ 53 Reassembling and Installing Cleaning and Inspecting Injectors ....... 53 Oil Pump ................................ 44 Reassembling Injectors ................. 55

Replacing Oil Filter and Crankcase Oil ...... 44 Installing Injectors ..................... 55 Fuel Lines and Connections .............. 56

Low Pressure Fuel Lines ................ 56 FUEL AND AIR SySTEM ..................... 45 High Pressure Injection Lines ........... 56

Air Cleaner ............................... 45 Air-Bleeding Fuel System ................. 56 Servicing Outer Filter Element ........... 45 Servicing Inner Filter Element ........... 45 COOLING SySTEM ......................... 58

Fuel Lift Pump ............................ 46 Water Pump ............................. 58 Removing and Disassembling Removing Water Pump ................. 58

Fuel Lift Pump ........................ 46 Disassembling Water Pump ............ 58 Reassembling and Installing Reassembling Water Pump ............. 59

Fuel Lift Pump ......................... 46 Installing Water Pump .................. 59 Replacing Fuel Filter Element .............. 46 Thermostat .............................. 60 Fuel Injection Pump ....................... 47 Replacing Thermostat .................. 60

Removing Injection Pump ............... 47 Testing Thermostat .................... 60 Installing Injection Pump ................ 47 Fan Belt Tension ......................... 60 Checking and Adjusting

Injection Pump Timing ................ 48 TROUBLE-SHOOTING ...................... 61

INTRODUCTION

GENERAL INFORMAT10N

This Part contains service information for PERKINS A4.236 Direct Injection Diesel Engine.

Thoroughly clean and inspect all components dur­ing servicing. Always plug or otherwise cover open fuel and oil lines and fittings to prevent entry of dirt.

Right and left-hand sides mentioned within text refers to engine as viewed from rear of flywheel. Direction of engine crankshaft rotation is viewed from crankshaft pulley end.

ENGINE SERIAL NUMBER

Engine Serial Number for A4.236 Diesel Engine is located on right side of cylinder block towards front, Fig. 1. Engine Serial Numbers for early engines were in the form of 236UA79319L. Engine Serial Numbers

for later engines are in the form of LD22052N379C. ALWAYS GIVE COMPLETE ENGINE SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS.

Fig. 1 - Engine Serial Number Location - Right Side of Engine

-2-

Fig. 88 - Timing Gear Marks Aligned with No. 1 Piston at T.D.C. on Compression Stroke

1. Injection Pump Drive Gear 4. Crankshaft Gear 2. Engine Idler Gear 3. Camshaft Gear

TIMING GEAR

5. Balancer Idler Gear 6. Balancer Drive Shaft Gear

7. Timing Marks

BACKLASH AND END-PLAY

1. Measure backlash between all timing gears, Fig. 89. .

~ ..

Fig. 89 - Measuring Timing Gear Backlash

Fig. 90 - Measuring Engine Idler Gear End-Play

a. Correct backlash between engine idler gear and its mating gears is 0.003-0.006 inch. .

b. Correct backlash between balancer idler gear and its mating gears is 0.006-0.009 inch.

c. Install new gears if backlash is excessive. When new gears are installed, recheck for minimum backlash. 2. Measure end-play of idler gears, Fig. 90.

a. Correct end-play is 0.004-0.008 inch for engine idler gear and 0.008-0.014 inch for balancer idler gear.

b. Replace worn parts if end-play is excessive. Wear limit for engine idler gear end-play is 0.010 inch or more. When new parts are installed, re­check end-play.

REMOVING TIMING GEARS

1. Release rocker arm shaft assembly to avoid possibility of damage to pistons or valve train.

2. Remove crankshaft pulley, timing gear cover, and crankshaft oil slinger.

3. Remove engine idler gear retainer, idler gear, Fig. 91, and idler gear hub, Fig. 92.

Fig. 91 - RemovingllnstalJing Engine Idler Gear

1. Bushing

-35- MF SOC - ENGINE

PART 4 - CLUTCH

CONTENTS

PAGE SPECiFiCATIONS................................................................................. 1

SEPARATING/REJOINING TRACTOR ........................... 0................................... 2 Separating Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 Rejoining Tractor ............................................................................... 3

SERVICING CLUTCH .............................................................................. 5 Removing Clutch............................................................................... 5 Disassembling Clutch ........................................................................... 5 Inspecting Clutch ............................................................................... 6 Reassembling Clutch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 Installing Clutch ................................................................................ 6 Adjusting Clutch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6

SERVICING BEARINGS AND RELEASE MECHANISM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 Pilot Bearing ................................................................................... 7 Release Bearing ................................................................................ 7 Release Fork ............................. 0 ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7

ADJUSTING CLUTCH LINKAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8

TROUBLE-SHOOTING............................................................................. 9

SPECIFICATIONS

Rated Clutch Cover Load ...................................................................... 2050 Ibs. Pressure Plate Springs:

Checking Height ........................................................................ 17/16 inches Load at Checking Height ............................................................... 220-235 Ibs. Free Length of New Spring ...................... 0 ••••••••••••••••••••••••••••••••••••• 1.955 inches Spring Color Code .. ' .......................................................................... Pink

Clutch Disc: Diameter .............................................................................. 10% inches Compressed Thickness ........................................................... 0.313-0.325 inches

Clutch to Flywheel Capscrew Torque ...................................................... 25-38 ft. -Ibs.

-1- MF SOC - CLUTCH

PART 5 - TRANSMISSIONS

CONTENTS

PAGE

SERVICE INFORMATION

TESTING AND ADJUSTING INSTANT REVERSE TRANSMISSION (HYDRAULIC SHUTTLE) ........... . 1

4

6 6 9

REMOVING/INSTALLING TRANSMISSION ASSEMBLy ............................................ . Separating/Connecting Engine and Transmission ............................................... . Separating/Connecting Transmission and Center Housing ....................................... .

REMOVING/INSTALLING TORQUE CONVERTER ................................................... 14

SERVICING a-SPEED TRANSMiSSiON ............................... *Refer to Separate Publication CS-17

SERVICING MANUAL SHUTTLE TRANSMISSION - WITH PTO ....... *Refer to Separate Publication CS-22

SERVICING MANUAL SHUTTLE TRANSMISSION -WITHOUT PTO INPUT SHAFT .................................... *Refer to Separate Publication CS-45

SERVICING INSTANT REVERSE (HYDRAULIC SHUTTLE) AND TORQUE CONVERTER ...................................... *Refer to Separate Publication CS-44

TROUBLE SYMPTOMS OF INSTANT REVERSE (HYDRAULIC SHUTTLE) .......................................... *Refer to Separate Publication CS-44

*IMPORT ANT:

This reference is a separate component service publication which contains disassembly, inspection and reassembly instructions after transmission has been removed. These instructions are filed under this divider ... and are identified by their CS number printed in the lower right-hand corner on each odd numbered page (beginning with a Page 1).

SERVICE INFORMATION

Many of the service procedures may be performed WITHOUT complete removal of transmission assem­bly from Tractor. It will require good judgment by the serviceman as to necessity for complete removal of transmission while considering the extent of servic­ing to be performed.

1. The following information pertains to a-Speed Transmissions:

a. Although reference service publication CS-17 shows a regulating valve installed on input shaft retainer ... this valve is not used in this Tractor application. Also the supply line shown routed through transmission case is not installed. The brake cross shaft shown through front of case

-1-

member (beneath clutch release bearing) is not installed in this location for this Tractor model. However, these minor variations will not affect BASIC servicing.

b. Main input shaft retainer and PTO input shaft (with their related seals and bearings) may be ser­viced by separating Tractor between engine and transmission ... this "split" will also allow servic­ing engine clutch release bearing.

c. Dual range planetary may be serviced by separating between transmission and center hous­ing. If shift cover is removed after this "split" ... shift rails and forks may be removed then main shaft and related gears.

MF 50C - TRANSMISSIONS

PART 6 - DRIVE AXLE AND BRAKES

CONTENTS

PAGE

SPECIFICATIONS .................................................................................. 2

DRIVE AXLE IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2

REAR WHEELS ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

ROPS (ROLL-OVER PROTECTIVE STRUCTURE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

AXLE HOUSING ................................................................................... 4 Differential Lock Adj ustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 Brake Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 Brake Disc Access. . .. ... . . .. . . . . . ... . . .. . . . . . .. . . . . . . . . .. ... . . . .. .. ... . ... . . . ... . . . ... .. . .. .. . .. 5 Axle Planetary ........................................................................ Refer to CS-47 Differential Lock ...................................................................... Refer to CS-47 Brakes ............................................................................... Refer to CS-47

DRIVE PINION REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6

DRIVE PINION INSTALLATION ...................................................................... B Servicing ............................................................................. Refer to CS-53

DIFFERENTIAL ASSEMBLY - REMOVAL OR INSTALLATION .......................................... 9 Service and Bearing Pre-Load .......................................................... Refer to CS-53

CENTER HOUSiNG ................................................................................. 10

CS-47 ....................................... Axle Planetary, Differential Lock and Brakes - Oil Immersed

CS-53 .................................................... Drive Pinion, Differential and Bearing Pre-Load

NOTE: This Part Contains 3 sections of material, all beginning with Page 1 and Figure 1.

CAUTION: To avoid personal injury, use positive acting jacks. hoists and secure blocking when raising, lowering or supporting Tractor, Loader Backhoe and Components.

Refer to Loader and Backhoe Parts in this Manual for additional precautions.

-1- MF 50C - DRIVE AXLE AND BRAKES

PART 7 - POWER TAKE-OFF CONTENTS

PAGE

PTO SHAFT AND SEAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

NO PTa WITH FERGUSON HYDRAULIC PUMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

INDEPENDENT PTO ............................................................................... 4 Testing......................................................................................... 4 Trouble Shooting. . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . .. ... . . . . . . . . . . . . . .... 5 Pressure Regulating Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 Clutch Pack ..................................................... , . . . . . . . . . . . ... . . . . . . . . . . . . . . . .. 6

Removal and Installation ...................................................................... 6 Servicing ....................................... " .................................. Refer to CS-54

HYDRAULIC PUMP AND PUMP DRIVE ............................................. Refer to Part 8, CS-26

CS-54 INDEPENDENT PTO CLUTCH PACK SERVICE

This Part contains two separate sections, each beginning with Page 1 and Figure 1.

h CAUTION: PTO shaft cover and PTO shield must be replaced when servicing is completed, ~ to avoid possible injury from rotating shaft.

PTO SHAFT AND SEAL SERVICING

1. Drain center housing. 2. Remove pto shield, beam bracket, 1, and retainer

plate, 2, Fig. 1. 3. Remove pto seal retainer, 3, Fig. 1. 4. Withdraw pto shaft, Fig. 2.

Fig. 1

5. Install pto shaft front bearing, Fig. 3, when required. Left axle housing and differential are removed to reach bearing.

6. Fig. 4, remove O-ring, 1, from seal retainer, 2. Remove snap ring, 3, and press bearing, 4, from shaft.

7. Fig. 5, in seal retainer, 1, seal shield, 2, is pressed to seat with inside protruding toward seal.

Fig. 2

-1- MF 50C - PTO

PART 8 - INTERNAL HYDRAULICS (3-POINT LINKAGE)

CONTENTS

PAGE

SERVICE INFORMATION ........................................ .". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Special Tools and Test Fittings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3-Point Linkage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Hydraulic Lift Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3-Point Linkage Controls ...................................................................... 2 Ferguson Hydraulic Pump ..................................................................... 2

Auxiliary Hydraulics - IPTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

TROUBLE-SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 "Quick" Service Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Trouble Symptoms............ ........................... ..... .................................. 8

ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Lift Cover Adjustments - Prior to Installation ............................... *Refer to Publication CS-41 "Final" Adjustments - Lift Covers WITHOUT Mounted Dashpot......................... ........... 9

HYDRAULIC LIFT COVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13 Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13 Servicing Lift Cover WITHOUT Mounted Dashpot ............................ *Refer to Publication CS-41

FERGUSON HYDRAULIC PUMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14 Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14 Servicing Ferguson Pump WITH Mounted Servo-Valve ....................... *Refer to Publication CS-43

AUXILIARY HYDRAULICS - IPTO .................................................... -. . . . . . . . . . . . .. 16 Removal/Installation of Pump and Drive Train .................................................... 16 Servicing Pump and Drive Train ............................................ *Refer to Publication CS-26

*IMPORTANT

This Part contains separate Component Service Publications (referred to as CS-_) with instructions that pertain to bench servicing of assemblies ... AFTER they have been removed. These publications may be found under this same divider tab ... immediately following this Part and are identified by the reference publication number printed in the lower right-hand corner of each odd numbered page.

The service procedures within this Part pertain to the 3-Point Linkage and Auxiliary Hydraulic Pump (IPTO) ONLY ... and their related components. To obtain instructions for other systems (i.e.: Steering, Independent Power Take-Off, etc.) refer to the appropriate Part (within this Manual) that pertains to the system.

-1-MF 406 AND 50C -

INTERNAL HYDRAULICS

PART 9 - ELECTRICAL SYSTEM

CONTENTS

PAGE

SPECiFiCATIONS................................................................................. 2 BATTERy......................................................................................... 3

Activating Dry Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Servicing Battery ............................................................................... 3

Charging and Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Checking State of Charge ..................................................................... 3

Testing Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 4 Specific Gravity Cell Comparison Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Load Test.................................................................................... 4 Full Charge Hydrometer Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ALTERNATOR .................................................................................... 5 Service Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Alternator Precautions ........................................................................ 5 Alternator Operation .......................................................................... 5

Alternator Trouble-Shooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Undercharged Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Overcharged Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Alternator Overhaul. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8 Alternator Disassembly ....................................................................... 8 Bearing Replacement and Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9 Alternator Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

Alternator Component Testing and Servicing ..................................................... 11 Rotor Checks ......................................... '.' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 Slip Ring Servicing ...... -. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 Stator Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 Brush Holder and Regulator Check ............................................................. 12 Diode Trio Check ............................................................................. 12 Rectifier Bridge Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13

STARTER MOTOR ................................................................................ 14 Trouble-Shooting Starter Circuit ................................................................. 14

Starter Circuit Inspection ...................................................................... 14 Starter Motor No-Load Test ................................................................... 14

Starter Motor Overhaul ......................................................................... 16 Starter Motor Disassembly .................................................................... 16 Field Frame Assembly ........................................................................ 17 Solenoid Assembly ........................................................................... 18 Starter Motor Cleaning and Lubrication ........................................................ 19 Starter Motor Reassembly ..................................................................... 19

Starter Motor Component Testing and Servicing .................................................. 20 Brushes and Brush Holders Inspection ......................................................... 20 Armature Checks and Servicing ................................................................ 20 Field Coil Checks ............................................................................. 20 Solenoid Checks ................ '.' ............................................................ 21 Pinion Clearance .............................................................................. 21

WIRING DIAGRAMS .............................................................................. 23

-1- MF 50C - ELECTRICAL

MF LOADERS AND BACKHOES

CONTENTS

PAGE

SAFETY PRECAUTIONS ............................................................ ii

SERVICE INFORMATION .......................................................... " ii

LOADERS

CONTENTS

HYDRAULIC SYSTEM INFORMATION - MF 32, MF 34 AND MF 300 LOADERS. . . . . . . . . . . . . .. 1

TROUBLE-SHOOTING .............................................................. 7

TESTS AND ADJUSTMENTS ........................................................ 10 Checking and Adjusting System Main Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10 Testing and Adjusting Circuit Reliefs (Within Spool Valve) .............................. 12 Testing for Valve Spool Leakage and Checking Spool Travel ............................ 13 Testing "Load Checks" ......................................................... 13 Testing for Internal Cylinder Leakage ............................................... 14 Checking Pump Efficiency (GPM) ................................................ 15 Testing and Adjusting Crossover Relief - M F 300 .................................... , 16

HYDRAULIC PUMPS - SERVICING .................................................. 17 Specifications ................................................................. 17 Cessna .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19 Hydreco ..................................................................... 22 Vickers ...................................................................... 24 "Breaking-In" New or Rebuilt Pump ................................................ 26

CONTROL VALVES - SERVICING .................................................... 27 Specifications ................................................................ . Cessna ..................................................................... . Parker-Hannifin

27 29 33

DOUBLE-ACTING CyLINDERS ....................................................... 39 Service Information and Specifications ............................................. 39 Service Procedures ............................................................ 41

1448976 M2 Printed In U.S.A.

BACKHOES

(See "Contents" page for Backhoes following Loader section)

-i-

TROUBLE-SHOOTI NG

The troubleshooting problem chart is di­vided into two categories of "symptoms" . . . one lists OPERATIONAL symptoms while the other lists COMPONENT symptoms.

chart, most like the malfunction experienced and refer to the "Possible Cause" paragraphs in the sequence order listed. (The references may seem to be listed in a haphazardly manner, but an attempt has been made to refer to the most easily checked, or most likely cause, in logical order.) Select the symptom, from the problem

OPERATIONAL SYMPTOMS

1. Foaming Oil ....................................... . ..... . 2. Fails to Raise ............................................. . 3. Slow or Erratic Lift (Also See # 17) ........................... . 4. Arms not Lifting Equally ..................................... . 5. Does not have Adequate Lift or Break-Out Capacity ............... . 6. Drops with Spool in "Raise" and another spool is Activated ......... . 7. Drops with Spool in "Neutral" Position ......................... . 8. Excessive Breakage of Hoses ................................ . 9. Low System Pressure (as Determined by Pressure Gauge) ......... .

COMPONENT SYMPTOMS !

CONTROL VALVE

10. External Leakage of Valve ................................... . 11. "Sticky" Valve Spool (s) ..................................... . 12. Unable to "Push" Valve Spool into Valve Body ................... . 13. Spring-Centered Spool does not Return to Neutral ................ . 14. "Float" Spool does not Stay in Detent .......................... .

HYDRAULIC PUMP

15. Pump Noisy and/or Overheating ............................. . 16. Pump Shaft Seal Leaking .................................... . 17. Pump GPM too Low (as Determined by Tests) ................... .

CYLINDERS

18. Rapid Leak Down .......................................... . 19. Cylinder Rod "Settles" into Barrel ............................. . 20. Cylinder Rod "Creeps" out of Barrel ........................... .

SEE POSSIBLE CAUSE

A,B,C A,B,D,E,H,T

F,A,B,C,H,G,Q,S,T G,I,X J,F,E

K Z,L,M,N

O,H H,Q

SEE POSSIBLE CAUSE

V,V,W S,T

S,V,T S,AA,AB,T

R

A,B,P,D,E,Q Q

F,A,B,P,C,D,Q

Z,M,U,N,L,V L,M,N,U L,M,N,U

Loaders-7