Rebuilding a Ford 455 tractor-loader-backhoe, from the diesel's bottom end to the transfer case, is exactly what this Ford 455 repair manual PDF was written for: 522 pages of factory procedure under OEM number 40045510. Hydraulic work dominates the book; the loader and backhoe circuits take up better than a quarter of it, with pressure tests, component overhauls, and schematics that trace oil from pump to spool to cylinder. Wiring diagrams map the charging and starting circuits, and each system (fuel, clutch, transmission, rear axle, steering) closes with its own troubleshooting and specifications. Torque the cylinder head bolts in three progressive steps up to 110 lbs. ft. (149 Nm) with the engine cold, then pull the fuel line nuts to 25 lbs. ft. (30 Nm), straight off the factory table. Guess at a spec and you buy the gasket set twice. Bookmarked and text-searchable, this PDF puts you two clicks from the section your 455 is waiting on.
What's Inside This Ford 455 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Production Date Codes and Serial Numbers | 3-4 | Tractor Number, Model, Unit, Engine, Transmission, Rear Axle |
| Safety Precautions | 5-8 | Personal Considerations, Equipment Considerations, General Considerations, Operational Considerations |
| Service Techniques | 9-10 | Service Safety, Hoses and Tubes, Bearings, Pressure Testing |
| Engine Systems | 11-62 | Engines (Diesel Engine: Description and Operation, Overhaul), Cooling System (-: Description and Operation, Trouble Shooting, Specifications and Special Tools |
| Fuel Systems | 63-92 | Fuel System Diesel, Injectors, Air Cleaner, Trouble Shooting, Specifications and Special Tools |
| Electrical System | 93-148 | Wiring, Lights and Controls, Battery, Starting Motor, Charging System, Trouble Shooting, Specifications and Special Tools |
| Clutch | 149-164 | Clutch Overhaul, Servicing Clutch Associated Components, Specifications and Special Tools |
| Transmission Systems | 165-248 | Manual Reversing Transmission, Torque Converter Drive Synchromesh Transmission, Trouble Shooting, Specifications and Special Tools |
| Cab | 249-258 | Cab Removal and Installation |
| Rear Axle and Brakes | 259-288 | Rear Axle Overhaul, Handbrake, Specifications and Special Tools |
| Hydraulic System | 289-430 | Description and Operation, Component Removal and Installation, Component Overhaul, Trouble Shooting, Pressure Tests and Adjustments, Specifications and Special Tools |
| Steering System | 431-458 | Hydrostatic Steering System, Power Steering Pump, Reservoir and Tubes, Trouble Shooting, Specifications and Special Tools |
| Front Axle | 459-496 | Front Axle Two Wheel Drive, Front Axle Four Wheel Drive, Transfer Case Front Wheel Drive Axle, Specifications and Special Tools |
| Wheels and Tires | 497-502 | Liquid Ballast, Tire Inflation, Wheel Nut Torque |
| Separating the Unit | 503-522 | Engine Removal, Transmission Removal, Rear Axle Removal, Torque Converter Alignment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Bearing Bolts | 115-125 lbs. ft. | p. 61 |
| Connecting Rod Nuts | 60-65 lbs. ft. | p. 61 |
| Injector Leak-Off Line Nuts | 10 Lbs. Ft. (12 Nm) (1.2 Kgm) | p. 90 |
| Fuel Line Nuts | 25 Lbs. Ft. (30 Nm) (3.0 Kgm) | p. 90 |
| Pump efficiency | 80% | p. 343 |
| Hydraulic oil filter change interval | 300 hours | p. 343 |
| System relief valve pressure setting (backhoe) | 2400-2550 psi (165-176 bar) | p. 407 |
| System relief valve pressure setting (reset) | 2500 psi (172 bar) | p. 407 |
| Hydraulic Pump Capacity | 25.0 gpm | p. 425 |
| Fuel Tank Capacity | 24 gal. | p. 90 |
| Battery Capacity | 128 ampere hours | p. 109 |
| Alternator Output Maximum (Hot) | 46 Amperes | p. 145 |
Ford 455 Common Problems This Manual Covers
Backhoe boom drifts down under load, lift cylinder creeps with controls in neutral
Test the lift circuit relief before pulling the cylinder: warm the oil, dead-head the circuit, and confirm 3450-3750 psi (238-259 bar) on a standard dipstick machine, per the chart on page 408. If pressure holds but the boom still settles, pull the lift cylinder and replace the piston seals, then inspect the control valve spool lands for scoring.
Manual Section: Hydraulic System Troubleshooting p. 408Engine loads down and relief valve squeals constantly with all levers centered
Check each control lever for full return to neutral; one sticking spool keeps this open-center system dead-headed. Verify both quick-disconnect couplings are fully seated and passing flow. Then gauge the backhoe system relief: it should crack at 2400-2550 psi (165-176 bar) and reset near 2500 psi, per page 407. Adjust or replace the relief valve if it opens early.
Manual Section: Hydraulic System Troubleshooting p. 407Backhoe swing responds slowly and weakly while loader circuits operate at normal speed
Test the swing circuit relief valves; both should open at 2400-2700 psi (165-186 bar) and reset at 2500 psi, per page 408. A single slow circuit points to that valve section or cylinder, not the pump. Check the swing spool for wear and the swing cylinder seals for internal bypass before touching anything upstream.
Manual Section: Hydraulic System Troubleshooting p. 408Frequently Asked Questions
Where is the serial number located on a Ford 455 tractor?
The vehicle identification plate, which contains the tractor serial number and other production codes, is located on the steering console on the left-hand side of the tractor. p. 3
What are the torque specifications for the cylinder head bolts on a Ford 455 engine?
The cylinder head bolts should be torqued only when the engine is cold. The tightening sequence is performed in three progressive steps: 90 lbs. ft. (122 Nm), 100 lbs. ft. (135 Nm), and finally 110 lbs. ft. (149 Nm). p. 20
How do you fix ford 455 loader and backhoe lose hydraulic power, cylinders barely move even at full throttle?
Check the reservoir level and top off before condemning the pump. Gauge pressure at the loader main relief: you want 2150-2300 psi at 20 gpm and 1700 rpm, per page 425. If pressure will not build, inspect the suction line for air leaks, then flow-test the pump against its 25.0 gpm rating; below 80 percent efficiency, replace it. p. 425
How do you fix hydraulic pump whines loudly after a few minutes of operation, oil looks foamy in reservoir?
Check the oil level first; a low reservoir lets the pump suck air and cavitate. Inspect suction line clamps and fittings for leaks that aerate the oil. Change the hydraulic filter if it is past the 300 hour interval, and torque the filter base bolts to 10 lbs. ft. (13 Nm) per page 344, no tighter. p. 344
How is this Ford 455 Repair Manual delivered?
A single searchable PDF file of 522 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Can I print a copy of this Ford 455 Repair Manual for the shop?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Is there a hydraulic diagram in this Ford 455 Repair Manual?
Yes. Complete hydraulic schematics are included, with circuit layouts, valve positions, and pressure specifications. See page 67 for an example.
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