Part of the John Deere Repair Manuals.
This is the factory repair manual for the John Deere 7425, 7525, 6140J, 6155J, and 6155JH tractors built from 2007 to 2016, the Mexico-market row-crop machines running the 6068 PowerTech diesel and 16F/16R PowrQuad. Inside you get complete teardown and rebuild procedures: cylinder head and crankshaft work, PermaClutch II service, PowrQuad clutch packs, MFWD front axle, wet-disc brakes, hydrostatic steering, and the closed-center hydraulic system with its axial piston pump and SCV stack. Specifications, capacities, torque values, and dealer special tools are all here. Note this is the repair manual; wiring diagnostics and trouble codes live in the companion diagnostic manual TM605919. Instant PDF download, printable, searchable.
What's Inside This John Deere 7425, 7525, 6140J, 6155J, 6155JH Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-30 | Safety Precautions, Decals, And Service Rules |
| General Information | 31-86 | Specifications, fuel/lubricant Capacities, Torque Values, And Serial Numbers |
| Engine | 87-112 | 6068 PowerTech Engine Repair - Cylinder Head, Block, Pistons, Crankshaft, Timing |
| Fuel, Intake, Cooling and Exhaust | 113-163 | Fuel Injection, Air Intake, Turbocharger, Cooling System, Radiator |
| Electrical System | 164-319 | Charging, Starting, Lighting, Instrument Cluster, And Circuit Diagrams |
| PowrQuad Transmission | 320-469 | 16F/16R PowrQuad Transmission, Clutch Pack, And Controls |
| Drive Systems | 470-696 | MFWD Front Axle, Differential, Final Drives, And PTO |
| Steering and Brakes | 697-771 | Hydrostatic Steering, Brake Valves, And Wet-Disc Brakes |
| Hydraulic System | 772-867 | Hydraulic Pump, Rockshaft, SCV Valves, And pressure/flow Controls |
| Miscellaneous | 868-1071 | Hitch, Drawbar, Ballast, And Attachments |
| Operator's Cab | 1072-1160 | Cab Frame, HVAC, Glass, And Interior Trim |
| Deluxe Seat | 1161-1171 | Air-Suspension Seat Service |
| Special Tools | 1172-1197 | Dealer-Fabricated Service Tools |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 6140J | ||
| Engine Power (at the PTO) | 92 kW (123 hp) | p. 32 |
| Flywheel Power | 103 kW (138 hp) | p. 32 |
| 6155J and 6155JH | ||
| Engine Power (at the PTO) | 100.6 kW (135 hp) | p. 32 |
| Flywheel Power | 115.5 kW (155 hp) | p. 32 |
| All models | ||
| Bore | 106.5 mm (4.19 in.) | p. 32 |
| Stroke | 127.0 mm (5.0 in.) | p. 32 |
| Compression Ratio | 16.9:1 | p. 32 |
| Intake Valve Clearance | 0.35 mm (0.014 in.) | p. 32 |
| Exhaust Valve Clearance | 0.45 mm (0.018 in.) | p. 32 |
| PTO Operating Speed | Independent | p. 32 |
| Rear PTO (Reversible) - 540/1000 rpm | 1995 rpm | p. 32 |
| PowrQuad Transmission Type | Planetary gears, hydraulically operated | p. 32 |
| Clutch Type | Hydraulically operated PermaClutch II | p. 32 |
| Hydraulic System Type | Closed center, flow and pressure compensated | p. 33 |
| Hydraulic System Pump Type | Axial piston and gear-type pump | p. 33 |
| Hydraulic System Pressure (min) | 2800 to 3300 kPa (28 to 33 bar; 406 to 479 psi) | p. 33 |
| Hydraulic System Pressure (max) | 19512 to 20477 kPa (195 to 204 bar; 2830 to 2970 psi) | p. 33 |
| Steering System Type | Hydrostatic | p. 33 |
| Lifting Capacity - Cat. 3N2 | 3805 kg (8390 lb) 610 mm behind the three-point hitch | p. 33 |
| Cooling System Capacity | 20 L (5.28 U.S.gal.) | p. 38 |
| Engine Crankcase w/Filter Capacity | 19.5 L (5.2 US.gal.) | p. 38 |
| Transmission/hydraulic - PowrQuad transmission capacity | 77 L (20.3 US.gal.) | p. 38 |
| Transmission/hydraulic - extra with creeper transmission capacity | 1 L (0.3 US. gal.) | p. 38 |
| Transmission/hydraulic - extra with front-wheel drive capacity | 3 L (0.8 US. gal.) | p. 38 |
| PTO Operating Speed - 540 rpm PTO (Reversible or Shiftable) | 2143 rpm | p. 39 |
| PTO Operating Speed - 1000 rpm PTO | 2208 rpm | p. 39 |
| Hydraulic System with Axial Piston Pump - System Pressure - Min. (Standby) | 3000 kPa (30 bar; 435 psi) | p. 39 |
| Hydraulic System with Axial Piston Pump - System Pressure - Max. | 20000 kPa (200 bar; 2900 psi) | p. 39 |
| Hydraulic System with Gear Pump - System Pressure - Min. (Standby) | 1200-1500 kPa (12-15 bar; 174-220 psi) | p. 40 |
| Hydraulic System with Gear Pump - System Pressure - Max. | 20000 (200 bar; 2900 psi) | p. 40 |
| Diesel Engine Coolant - Freeze protection (50% ethylene glycol) | -37°C (-34°F) | p. 53 |
| Diesel Engine Coolant - Freeze protection (50% propylene glycol) | -33°C (-27°F) | p. 53 |
| 2WD models | ||
| Turning Radius - 2WD (With 10.00-16 Front Tires) - Without Applying Brakes | 4280 mm (168.5 in.) | p. 34 |
| MFWD models | ||
| Turning Radius - MFWD (With 14.9-28 and 14.9-30 front tires and 1720 mm [68 in.] track) - Disengaged Without Applying Brakes | 4780 mm (188 in.) | p. 34 |
| 6140J Tractor | ||
| Max. Permissible Front Axle Load - Axle without Brake | 4100 kg (9035 lb) | p. 36 |
| Max. Permissible Front Axle Load - Axle with Brake | 4400 kg (9695 lb) | p. 36 |
| Fuel Tank Capacity | 207 L (54.7 US.gal.) | p. 38 |
| 6155J and 6155JH Tractors | ||
| Max. Permissible Front Axle Load - Axle without Brake | 4400 kg (9695 lb) | p. 36 |
| Max. Permissible Front Axle Load - Axle with Brake | 4700 kg (10355 lb) | p. 36 |
| Fuel Tank Capacity | 250 L (66.0 US.gal.) | p. 38 |
John Deere 7425, 7525, 6140J, 6155J, 6155JH Common Problems This Manual Covers
Harsh or slipping shifts in the 16F/16R PowrQuad, especially under load in the higher powershift steps.
The PowrQuad Transmission section covers clutch pack disassembly, plate inspection and stack measurement, control valve service, and pressure testing so you can tell worn friction plates from a control-side problem before splitting the tractor.
Manual Section: PowrQuad TransmissionWeak three-point hitch or slow SCV response, often blamed on the pump when it is not the pump.
The Hydraulic System section gives pressure and flow test procedures for the axial piston pump, standby pressure checks, SCV valve overhaul, and rockshaft service, letting you isolate the actual failed component instead of throwing an expensive pump at it.
Manual Section: Hydraulic SystemMFWD front axle leaks, kingpin play, or a bind when the front axle engages.
The Drive Systems section covers MFWD front axle teardown, differential and final drive rebuild, seal replacement, and preload settings, plus PTO service, so you can fix leaks and play properly rather than topping off oil forever.
Manual Section: Drive SystemsOverheating in hot-climate field work from a tired cooling system or turbocharger trouble.
The Fuel, Intake, Cooling and Exhaust section covers radiator removal, thermostat and water pump service, turbocharger inspection and replacement, and fuel injection service, which together handle most heat and power complaints on the 6068 PowerTech.
Manual Section: Fuel, Intake, Cooling and ExhaustFrequently Asked Questions
Does this manual cover the 6068 PowerTech engine rebuild, including head and crank work?
Yes, fully. The Engine section walks through cylinder head removal, valve service with the correct clearances (0.35 mm intake, 0.45 mm exhaust), piston and liner work on the 106.5 mm bore, crankshaft bearings, and timing gear installation. It is written for a complete in-frame or full teardown.
Will this help me split the tractor for PermaClutch II or PowrQuad clutch pack service?
Yes. The PowrQuad Transmission section covers separating the tractor, pulling the hydraulically operated PermaClutch II, and rebuilding the clutch packs and planetary sets in the 16F/16R gearbox, with assembly specs and the special tools you need for each step.
Are hydraulic pressure specs included so I can test the system before tearing into it?
Yes. The manual lists standby pressure at 2800 to 3300 kPa and max system pressure at 19512 to 20477 kPa (195 to 204 bar) for the closed-center system, plus procedures for the axial piston pump, SCV valves, and rockshaft so you can diagnose weak hydraulics before replacing parts on a guess.
Does it include electrical circuit diagrams and diagnostic trouble codes?
The Electrical System section covers charging, starting, lighting, and instrument-cluster service with component testing and replacement. Full wiring schematics and diagnostic trouble-code procedures are not in this repair manual - they live in the companion diagnostic manual TM605919, so pair the two for electrical fault-finding.
What format is this, and can I print pages for the shop?
It is a PDF delivered by instant download after payment. It is searchable, bookmarked by section, and prints cleanly, so you can take just the pages you need under the tractor instead of a laptop.
