Ford issued this book as publication 40075510, the factory service manual for the 755, 755A, and 755B Tractor Loader Backhoe, and the complete 476-page Ford 755 service manual PDF is what you download here. Wiring diagrams anchor the electrical section, tracing the charging and starting circuits from battery through alternator, while hydraulic schematics map loader and backhoe flow right down to the system pressure checks. Both turbocharger builds, Air Research and Schwitzer, get their own overhaul and troubleshooting chapters, as do the transmissions, rear axle, brakes, and steering. Pull the head down in three stages, 90, 100, then 110 lbs. ft., and refill the hydraulic reservoir with its full 15 gallons (56.8 liters). A guessed torque figure cracks castings or drops a bearing. Bookmarks and a live text layer put the section you're after two taps away.
What's Inside This Ford 755, 755A, 755B Manual
| System | Pages | Key Topics |
|---|---|---|
| Engines and Lubrication System | 5-46 | Cylinder Head, Valves, And Related Parts, Engine Front Cover and Timing Gears, Oil Pan Sump and Oil Pump, Connecting Rods, Bearings, Pistons |
| Turbochargers - Air Research | 47-55 | Description and Operation, Turbocharger Overhaul, Trouble Shooting |
| Turbochargers - Schwitzer | 56-68 | Description and Operation (V-Band Clamp Turbine-To-Centre Housing, Not Interchangeable with the Bolted Type), Turbine and Compressor Wheels on a Common Shaft at Up to 80, 000 RPM, Bearing Housing Oil Flow and Sealing Rings, Turbocharger Overhaul, Trouble Shooting |
| Cooling System | 69-74 | Description and Operation, Radiator and Thermostat, Water Pump |
| Trouble Shooting, Specifications, and Special Tools - Engines | 75-86 | Engine Troubleshooting, Engine Specifications, Special Tools |
| Fuel System | 87-110 | Diesel Fuel System, Injectors, Fuel Troubleshooting, Fuel Specifications |
| Electrical System | 111-174 | Wiring Diagrams, Battery, Alternator Charging System, Starting System |
| Transmission | 175-216 | Transmission Servicing, Torque Converter, Transmission Troubleshooting, Lubrication |
| Rear Axle and Brakes | 217-242 | Rear Axle Shaft Assembly, Disc Brake Assembly, Differential Lock, Drive Pinion Assembly |
| Speed Power Reversing Transmission | 243-278 | Transmission Operation, Hydraulic Flow, Clutch Pack Identification, Troubleshooting |
| Steering and Front Axle | 279-312 | Steering System, Front Axle Overhaul, Toe-In Adjustment, Steering Motor |
| Ford 755 Tlb - Wheels, Tires, Component Removal, Loader-Backhoe Hydraulics, and Supplement | 313-476 | Wheel Nut Torque, Engine Removal, Loader-Backhoe Hydraulics, System Pressure Checks, Supplement |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head bolt torque (step 1) | 90 lbs. ft. (121.9 Nm) | p. 11 |
| Cylinder head bolt torque (step 2) | 100 lbs. ft. (135.5 Nm) | p. 238 |
| Hydraulic oil reservoir capacity | 15 gallons (56.8 Liters) | p. 343 |
| Hydraulic pump combined output | 44 gpm | p. 344 |
| Cylinder Head Flatness (Maximum Overall) | 0.006 in. | p. 10 |
| Cylinder Head Bolt Torque (Final) | 110 lbs. ft. | p. 15 |
| Rear Wheel Lug Nut Torque | 650-700 lbs. ft. | p. 315 |
| Backhoe Lift Valve System Relief Pressure | 2300 psi | p. 432 |
Ford 755, 755A, 755B Common Problems This Manual Covers
Ford 755 backhoe won't move or drives weak until the transmission warms up
Check transmission oil level and condition first; thick or contaminated oil starves the converter charging pump when cold. Test clutch pack pressures following the Speed Power Reversing Transmission procedures starting on page 243, tracing flow on the schematic on page 258. If the loader hydraulics also drag when cold, drain and refill the reservoir with 15 gallons (56.8 Liters) of clean oil.
Manual Section: Speed Power Reversing Transmission p. 243Loader or backhoe cylinders leak down and the boom settles under load
Run the isolation test in the loader-backhoe hydraulics coverage starting on page 313 to separate cylinder seal leakage from valve leakage. Verify the backhoe lift circuit relief holds 2300 psi, referenced on page 432. If pressure checks good and the boom still drops, replace the piston seals and rod packing with a full seal kit.
Manual Section: Loader-Backhoe Hydraulic Troubleshooting p. 432Engine overheats under load, temperature gauge climbs into the red while digging
Check the radiator core for packed mud and chaff; blow it clean with compressed air from the fan side. Verify thermostat and water pump operation using the cooling system troubleshooting on page 71. If the head gasket failed from overheating, torque the head bolts in three steps to a final 110 lbs. ft. (149.0 Nm).
Manual Section: Cooling System p. 71Engine cranks slowly in cold weather and will not start without extended cranking
Test battery voltage under load first, then clean and tighten the ground cable at the frame. Trace voltage drops through the starting circuit with the wiring diagram in the Electrical System section starting on page 111. If you pull the starter, torque the mounting bolts to 30-35 lbs. ft. (40.65-47.42 Nm) on reinstall.
Manual Section: Electrical System p. 111Oil leaking from the front of the engine behind the crankshaft pulley
Remove the crankshaft pulley and inspect the front seal and the pulley wear surface; a grooved hub will chew up a new seal in a week. Replace the seal following the engine front cover procedures starting on page 5, then torque the pulley bolt to 130-160 lbs. ft. (176.1-216.8 Nm) and recheck after warm-up.
Manual Section: Engines and Lubrication System p. 5Frequently Asked Questions
What is the correct torque specification for the cylinder head bolts on the Ford 755 engine?
The cylinder head bolts should be tightened in three progressive steps: first to 90 lbs. ft. (121.9 Nm), then to 100 lbs. ft. (135.5 Nm), and finally to 110 lbs. ft. (149.0 Nm). These bolts should only be torqued when the engine is cold. p. 15
What is the specified valve lash clearance for the intake and exhaust valves on the Ford 755 engine?
The intake valve lash clearance is 0.014-0.016 in. (0.36-0.41 mm), and the exhaust valve lash clearance is 0.017-0.019 in. (0.43-0.48 mm). p. 78
What is the recommended oil capacity for the transmission on the Ford 755?
The transmission capacity is 28 U.S. Qts. (23.3 Imp. Qts.; 26.4 liters). p. 216
How do I check the flatness of the cylinder head?
Use a straight edge and feeler gauge to check the flatness lengthwise, diagonally, and crosswise. The maximum overall flatness specification is 0.006 in. (0.15 mm), or 0.003 in. (0.076 mm) in any six inches. p. 10
What is the correct torque for the main bearing bolts on the Ford 755 engine?
The main bearing bolts should be tightened to a torque of 115-125 lbs. ft. (155.8-166.8 Nm). p. 84
Will this Ford 755 Service Manual download right away?
A single searchable PDF file of 476 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Does this Ford 755 manual allow printing?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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