755, 755A & 755B Tractor, Loader & Backhoe

Serv

ice

Man

ual

Service Manual

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

755, 755A & 755B Tractor, Loader &

Backhoe

FO-S-755+

http://www.jensales.com/products/ford-tractor-loader-backhoe-service-manual.html

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Tr ct L er a h7 ,755A, an 75 B

40075510

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Part 1

ENGINES

Chapter 1

ENGINES AND LUBRICATION SYSTEM

Section Page

1. Description and Operation . . . . . . . . . . . . . . . . . . . . . . . .. 1

2. Cylinder Head, Valves, and Related Parts. . . . . . . . . . . . . . . . . . .. 4

3. Engine Front Cover and Timing Gears. . . . . . . . . . . . . . . . . . . . . .. 12

4. Oil Pan Sump and Oil Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17

5. Connecting Rods, Bearings, Pistons, Rings, and Cylinder Block 20

6. Balancer, Main Bearings, Flywheel, and Crankshaft. . . . . . . . . .. 30

7. Camshaft 39

Chapter 2

TURBOCHARGERSAI R RESEARCH

Section Page

1. Description and Operation .... . . . . . . . . . . . . . . . . . . . . . . . . . . .. 43

2. Turbocharger Overhaul. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 45

3. Trouble Shooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 60

SCHWITZER

Section Page

1. Description and Operation .... . . . . . . . . . . . . . . . . . . . . . . . . . . .. 52

2. Turbocharger Overhaul. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 53



Chapter 3

COOLING SYSTEM

Section Page

1. Description and Operation ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 65

2. Radiator and Thermostat 66

3. Water Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 67

Chapter 4

TROUBLE SHOOTING, SPECIFICATIONS,AND SPECIAL TOOLS

Section Page


2. Specifications 73

3. Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 81

i i


1-

~MPOfrrANT: Excessive looseness of the turbine housing can result in damage to the turbinewheel sufficient to require replacement at" theturbine wheel assemblv.

11. After attaching turbine housing (8) f to the centerhousing and rotating assembly, tighten bolts (5),just enough to prevent the turbine wheel fromcontacting the housing y but loose enough to permit the turbine housing to rotate with respect tothe center housing. Do not bend up the tabs oflockplates (6), at this time.

IMPORTANT: Excessive looseness of the compressor housing can result in damage to thecompressor whee! sufficient to require replacement of the wheel.

12. Orient the assernbied parts so that the compressor wheel is facing up and instaH compressorhousing (4), on the backplate assembly. Installclamps (3), lockplates (2), and bolts (1). Tightenthe bolts just enough to prevent the housingfrom contacting the compressor wheel, butloose enough to permit the compressor housingto rotate with respect to the center housing.

13. If match marks applied to the turbine housingand the center housing during disassembly arevisible, align these marks. Then, tighten bolts(5), to a torque value of 100 to 130 inch pounds(11.29 - 14.68 Nm), and bend the tabs of thelockplates up against the bolts. If there are nomatch marks on the turbine housing and centerhousing, orient the turbine housing as outlined inthis manual under INSTALLATION.

NOTE: Tighten stainless steel bolts to a torquevalue of 140 to 170 inch pounds (15.81 - 19.19Nm).

14. If match marks applied to the compressor housing and center housing during disassembly of theturbocharger are visible, angn these marks.Then, tighten bolts (1 f Figure 75), to a torquevalue of 100 to 130 inch pounds (11.29 - 14.68Nm), and bend the tabs of the iockp'ates upagainst the bolts. If there are no match marks onthe compressor housing and center housing,orient the compressor housing as outlined in thismanual under INSTALLATION.

15. Prelubricate the turbocharger as outlined in thismanual under INSTALLATION.

50

f. BEARiNG CLEARANCE ~NSPECT~O~~

PROCEDURES

When there is reason to suspect that the tu rbocha rgerbearings are sufficient~y worn to permit either thecompressor or turbine whee! to rub In its housing(such as when there is an audib~e indication of rub-·bing) ( it is recornmended that the following bearingclearance inspection procedures be performed.

1. Remove the air duct from the compressor air in-let, and remove the exhaust duct from the turbine exhaust gas outlet.

2. Disconnect the oil supply Hne franl the oil inletport at the top of the turbocharger center hous-ing.

3. Attach a plunger-type dial indicator with a twoinch extension rod, or equivalent) to the centerhousing so the indicator plunger extendsthrough the oil inlet port and contacts the shaftof the turbine wheel assembly. See Figure 79.

4. Manually apply pressure equally andsimultaneously to both the compressor and turbine wheels as required to move the turbinewheel assembly shaft away from the dial indicator plunger as far as it will go.

71Inspecting Malnfffihsft Bearing Radial Tolerance

1. Compressor Housing 4. Magnetic Dial Indicator2. Indicator P~unger Stand3. Oil Port 5. Indicator Gauge


Part 2

FUEL SYSTEM

Chapter 1

DIESEL FUEL SYSTEM - FORD 755

Section Page

1. Description and Operation .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2

2. Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4

3. Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

4. Fuel Tank, Fuel Lines, and Fuel Filters 5

5. Fuel Lift Pump 6-7

6. Fuel Injection Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7

Chapter 2

INJECTORS

Section Page

1. Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9v

2. Removing and Installing Injectors 9-10

3. Injector Testing 0.,,' •••••••••••••••••••••••••. 11-12

4. Injector Overhaul 12-15

5. Injector Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15

Chapter 3

TROUBLE SHOOTING, SPECIFICATIONSAND SPECIAL TOOLS

Section Page

1. Trouble Shooting 17-18


3. Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20


Part 3

ELECTRICAL SYSTEM

Chapter 1

WIRING, LIGHTS, AND INSTRUMENTS

Section Page

1. Wiring Diagrams . . . . . . . . . . . . . . . . . . . . 1

2. Lights, Light Switch and Key Starter Switch .

3. Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2

BATTERY

Section Page

1. Description .

2. Specific Gravity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. Periodic Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4. Battery Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Chapter 3

ALTERNATOR CHARGING SYSTEM

Section Page

1. Introduction .

2. In-Vehicle Tests and Service Procedures . . . . . . . . . . . . . . . . . . . . 5

3. Alternator Overhaul and Bench Check. . . . . . . . . . . . . . . . . . . . .. 14

PAGEi


PAGE ii

Chapter 4

STARTING SYSTEM

Section Page

1. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Starting Motor (5 in.) 1

3. Safety Starter Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16

4. Key Starter Switch 16

Chapter 5

TROUBLE SHOOTING, SPECIFICATIONS

AND SPECIAL TOOLS

Section Page

1. Trouble Shooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Specifications 3

3. Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5


Part 4

TRANSMISSION

Chapter 1

SERVICING THE TRANSMISSION

Section Page

1. Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

2. Torque Converter 7

3. Transmission 14

4. Filter, Transmission Pump andRegulator Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25

5. Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 27

6. Servicing Oil Supply Tubes 79

7. Servicing the Torque Converter and Transmissionas a Unit After Repair 30

8. Installing Fiber Ring Gear to Engine Flywheel 31

Chapter 2

TESTS AND TROUBLE SHOOTING,SPECIFICATIONS AND LUBRICATION,

SPECIAL TOOLS

Section Page

1. Test and Trouble Shooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 35

2. Specifications and Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 38

3. Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 40


Part 5

REAR AXLE AND BRAKES

Chapter 1

REAR AXLE AND BRAKES

Section Page

1. Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2

2. Adjustments , 2-4

3. Overhaul Rear Axle Shaft Assembly. . . . . . . . . . . . . . . . . . . . . . .. 5-8

4. Overhaul Planetary Gear Assembly and Axle Housing 9·-11

5. Overhaul Disc Brake Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6. Overhaul Differential and Differe~tial Lock Assembly. . . . . . . . .. 12-15

7. Overhaul Parking Brake Assembly. . . . . . . . . . . . . . . . . . . . . . . . .. 15-17

8. Overhaul Drive Pinion Assembly 18-20

9. Overhal Brake Pedals and Linkage. . . . . . . . . . . . . . . . . . . . . . . . .. 20

Chapter 2

SPECIFICATIONS AND SPECIAL TOOLS

Section Page

1. Specifications , . . . . . . . . . . . . . .. 21-22

2. Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22·-23


Part 6

STEERING AND FRONT AXLE

Chapter 1

STEERING

Section Page

1. Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Component Removal and Installation. . . . . . . . . . . . . . . . . . . . . . . 4

3. Component Overhaul 7

Chapter 2

FRONT AXLE

Section Page

1. Description " . . . . . . . . .. 21

2. Toe-in Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 21

3. Front Wheel Spindle Overhaul. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23

4. Front Axle Overhaul 26

Chapter 3

TROUBLE SHOOTING, SPECIFICATIONSAND SPECIAL TOOLS

Section Page



3. Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 31


Part 7

FORD 755 TLBWHEELS AND TIRES

Chapter 1

DESCRIPTION AND SPECIFICATIONS

Section

1.

2.

General .

Wheels and Tires .

Page

3. Wheel Tread. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4. Wheel Nut Torque Specifications. . . . . . . . . . . . . . . . . . . . . . . . . 2

1. GENERAL

The Ford 755 TLB is equipped with heavy duty frontand rear wheels. Front and rear large ply tires provideheavy load carrying capability as well as floatation foroff highway work conditions.

CAUTION: Always use overhead craning equipment to remove and install reartires. Use tire safety cage when applyingair pressure to inflate new or repairedtires. WEAR gloves to protect the handsand safety glasses to protect the eyes.

2. WHEELS AND TIRES

Front Wheels Rear Wheels

The front wheels are carried on heavy duty truck typespindles. Each wheel is secured to the spindle usingeight nuts.

IMPORTANT: Wheel nuts should be checked once aweek for tightness, See page 2 for torque specifications. Follow tightening sequence as shown in Figure1.

The rear wheels locate on a pilot on the end of the axleshaft. When the rear wheels are removed, the axlepilot should be cleaned and an anti-seize compoundapplied, Ford Part Number SBP-239573-B. This willprevent rusting and facilitate wheel removal at a laterdate. Each wheel is secured to the rear axle by eightnuts.

IMPORTANT: Wheel nuts should be checked once aweek for tightness. See page 2 for torque specifications. Tighten wheel nuts following the sequence asshown in Figure 1.


Part 8

COMPONENT REMOVALPage

Chapter 1

ENGINE REMOVAL AND INSTALLATIONPage

Chapter 2

TRANSMISSION REMOVALAND INSTALLATION

Chapter 3

7

REAR AXLE AND CENTER HOUSINGREMOVAL AND INSTALLATION

Section Page

1. Removing Rear Axle and Center Housing withthe Engine and Transmission Removed 11

2. Removing Rear Axle and Center Housing withthe Engine and Transmission Installed 13

Chapter 4

SPECIFICATIONS AND SPECIAL TOOLS

Section Page


2. Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15



Part 9

FORD 755 - LOADER-BACKHOEAND HYDRAULICS

Chapter 1DESCRIPTION AND OPERATION

Section Page

1. General .

2. Structural Members 2

3. Cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4. Reservoir, Filter and Screen, and Oil Cooler. . . . . . . . . . . . . . . . . . 7

5. Pump, Hoses and Tubing, Valves . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chapter 2COMPONENT OVERHAUL

Section Page

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 29

2. Hoses and Tubing '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30

3. Reservoir, Filter and Screen, Oil Cooler 35

4. Structural Members 37

5. Cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 51

6. Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 60

7. Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 83

Chapter 3LUBRICATION AND MAINTENANCE

Section Page

1. Lubrication and Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 91


Chapter 4ADJUSTMENTS ANDPRESSURE CHECKS

Section Page

1. Mechanical Adjustments 93

2. Pressure Checks 96

3. Hydraulic Tester Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 105

Chapter 5TROUBLE SHOOTING

Section Page

1. General 115

2. Backhoe Trouble Shooting 117

3. Loader Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 121

Chapter 6SPECIFICATIONS

Section Page


2. Special Tools 129

ii


------------PART 9 - HYDRAULICS-------------

TIRES

Front Tires Rear Tires

Standard 11.00-16 (12 ply F3)Optional 14.00-17.5 (10 ply Truck)

Standard 16.9-28 (8 ply R4)Optional 18.4-28 (10 ply R4)

.....-----L----.....----- K---~

DLOADER GENERAL DIMENSIONS AND PERFORMANCE:

A. Overall Operating Height 14 ft. 10 1/4 in. (492.1 em)B. Height to Hinge Pin 11 ft. 4 in. (345.4 em)C. Overall Height with ROPS 8ft.11 in. (281.8 em)D. Overall Length 25 ft. 8 in. (781.8 em)E. Dump Angle Maximum 50°F. Dump Height 8 ft. 7 in. (262.4 em)G. Reach Fully Raised @ 45° 3 ft. 9 in. (115.6 cm)H. Rollback 43.4°I. Maximum Rollback 46°J. Digging Depth (Level Bucket) 7.5in. (19.0cm)K. Wheelbase 7 ft. 5.2 in. (226.7 cm)L. Bucket Tip To Front Axle 7 ft. 5 in. (226.0 cm)M. Height to Loader Lift Arm Frame 5 ft. 9 in. (173.3 cm)

Ford 755 Equipped with a 1-1/2 cu. yd. (1.15 cu. meters) Bucket

Above data is measured to SAE J-732C Standard

124


Documents

755, 755A & 755B Tractor, Loader & Backhoe