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Part of the John Deere Repair Manuals.
Need the real factory service data for your John Deere 4055 shop manual PDF? This 203-page OEM reference covers the entire 55 Series: 4055, 4255, 4455, 4555, 4755, and 4955 tractors. Inside: hydraulic schematics with full fluid routing, wiring diagrams for the Intellitrak Warning System and charging circuit, and a troubleshooting section for chasing electrical and fuel faults before pulling parts. You get complete overhaul procedures for both Perma-Clutch and Power Shift transmissions, injection pump static timing, viscous fan clutch service, and brake system work including accumulator rebuild and brake valve adjustment. Brake piston diametral clearance in the bore runs 0.003–0.007 inch; on Quad-Range models, retire Perma-Clutch discs once thickness drops below 0.110 inch (2.79 mm). Your tractor is parked and the clock is running. Search any spec by keyword, jump to any section in seconds, and bring it right to the shop floor.
What's Inside This John Deere 4055-4955 Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 37-49 | After Cooler, Air Cleaner, Assembly, R&R, Camshaft and Bearings, Connecting Rods and Bearings, Crankshaft and Bearings |
| Cooling System | 50-60 | Fan and Viscous Clutch, Radiator, Thermostats and Water Manifold, Water Pump |
| Diesel System | 61-70 | Adjustment, Aneroid, Filter and Bleeding, Injection Pump, Injection Nozzles, Transfer Pump, Static Timing |
| Electrical System | 71-77 | Alternator and Regulator, Intellitrak Warning System, Neutral Start Switch, Starting Motor |
| Clutch | 78-113 | Engine Clutch (Perma-Clutch), R&R and Overhaul Perma-Clutch, Two-Speed Planetary, Transmission Disassembly and Reassembly, Overhaul, Control System, Control Linkage |
| Differential | 114-137 | Remove and Reinstall, Differential Drive Shaft |
| Differential Lock | 138-146 | Adjustment, Control Valve |
| Brakes | 147-203 | Bleeding, Brake Accumulator, Brake Pistons, Plates & Discs, Brake Valve, Operation and Adjustment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Brake accumulator O-rings and back-up washers | Renew | p. 151 |
| Brake piston diametral clearance in bores | 0.003-0.007 inch (0.08-0.18 mm) | p. 152 |
| Brake pad rivet head depth below surface of pad | 0.060 inch (1.6 mm) | p. 152 |
| Axle bearings end play | Zero end play | p. 145 |
| Axle rolling drag torque | 10-23 ft.-lbs. (13-31 N.m) | p. 145 |
| Manual brake piston outside diameter | 0.933-0.935 in. (23.70-23.75 mm) | p. 150 |
| Manual brake piston bore in valve | 0.9365-0.9375 in. (23.79-23.81 mm) | p. 150 |
| Front-wheel drive U-joint clamp self-locking screws torque | 50 ft.-lbs. (68 N.m) | p. 16 |
| Brake accumulator precharge pressure | 475-525 psi (3280-3620 kPa) | p. 151 |
| Valve Clearance - Intake | 0.015 in. | p. 8 |
| Quad-Range Models | ||
| Perma-Clutch traction clutch discs and PTO clutch discs thickness (minimum) | 0.110 inch (2.79 mm) | p. 84 |
| Power Shift Models | ||
| Power Shift traction clutch discs (new) thickness | 0.137-0.143 inch (3.48-3.64 mm) | p. 120 |
John Deere 4055-4955 Common Problems This Manual Covers
John Deere 4055 series brake accumulator pressure loss requiring constant bleeding and complete inability to stop p. 151
Inspect the brake accumulator O-rings and back-up washers. Renew the seals as detailed on page 151. Verify the brake accumulator precharge pressure measures exactly 475-525 psi (3280-3620 kPa). Bleed the system and test pedal equalization to confirm proper return flow.
Manual Section: BrakesTractor slips under heavy load or experiences complete inability to engage gears in the field p. 120
Measure the traction clutch disc thickness. For Power Shift models, replace the discs if they fall below the specified 0.137-0.143 inch (3.48-3.64 mm) found on page 120. Check system pressure and perform an accumulator operation check to ensure proper transmission engagement.
Manual Section: Power Shift Transmission TroubleshootingDrive shaft failure under load or axle housing seizure with AXL_SEG bearing failure warning code p. 145
Inspect the axle housing bearings for wear and replace if damaged. Adjust the axle bearings to achieve zero end play as specified on page 145. Verify the correct rolling drag torque is set to 10-23 ft.-lbs. (13-31 N.m) before returning the machine to service.
Manual Section: DifferentialFront-wheel drive not engaging or disengaging properly accompanied by excessive front tire wear p. 16
Check the front-wheel drive U-joint clamp self-locking screws. Torque the screws to 50 ft.-lbs. (68 N.m) according to the specifications on page 16. Drain and refill the front-wheel drive axle housing with exactly 12.0 U.S. qts. of fluid as listed on page 9.
Manual Section: Front-Wheel Drive System TroubleshootingFrequently Asked Questions
What are the torque specs for the engine bolts on John Deere 4055 and 4255 tractors?
For John Deere 4055 and 4255 tractors, tighten cap screws securing the engine to the clutch housing to 300 ft.-lbs. (407 N.m) and oil pan to clutch housing cap screws to 120 ft.-lbs. (163 N.m). Cylinder head cap screws should be tightened to a final torque of 180 ft.-lbs. (245 N.m), with rocker shaft clamps at 55 ft.-lbs. (75 N.m).
What are the replacement specifications for Brake pistons and discs?
Brake pistons should have a diametral clearance of 0.003-0.007 inch (0.08-0.18 mm) in their bores. When renewing brake pads, install new pads ensuring rivet heads are 0.060 inch (1.6 mm) below the surface of the pad. Renew brake discs if warped or excessively worn.
How do you fix john Deere 4055 series brake accumulator pressure loss requiring constant bleeding and complete inability to stop?
Inspect the brake accumulator O-rings and back-up washers. Renew the seals as detailed on page 151. Verify the brake accumulator precharge pressure measures exactly 475-525 psi (3280-3620 kPa). Bleed the system and test pedal equalization to confirm proper return flow.
How do you fix tractor slips under heavy load or experiences complete inability to engage gears in the field?
Measure the traction clutch disc thickness. For Power Shift models, replace the discs if they fall below the specified 0.137-0.143 inch (3.48-3.64 mm) found on page 120. Check system pressure and perform an accumulator operation check to ensure proper transmission engagement.
What format is this manual in?
Instant PDF download. You get the full 203-page searchable Shop Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print this manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this John Deere 4055 & variants manual include hydraulic schematics?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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