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Part of the John Deere Repair Manuals.
This is the factory repair manual (TM401019, June 2010 Europe edition, 97/68/EC spec) for the John Deere 6225, 6325, 6425 and 6525 tractors, from the 69 kW (94 hp) 6225 up to the 88 kW (120 hp) 6525. It walks you through actual wrench work: pulling the complete engine, splitting into the SyncroPlus and PowrReverser transmissions, front-wheel drive clutch, differential and final drives (both with 3D animations), rear PTO, hydrostatic steering, wet brakes, the full hydraulic system with hitch and SCVs, plus ECU removal, connectors, charging and starting circuits. Special tools are listed, including the dealer-fabricated ones. Removal, installation, adjustment and specs, written the way Deere dealer techs use it.
What's Inside This John Deere 6225, 6325, 6425, 6525 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-30 | Safety Information |
| General Information & Specifications | 31-90 | Engine Specifications, Tune-Up, Inspection Before Delivery |
| Engine (Remove/Install) | 91-118 | Whole-Engine Removal and Installation, Special Tools, Specifications |
| Fuel, Air Intake, Cooling and Exhaust Systems | 119-168 | Speed Control, Fuel System, Air Intake System, Cooling System, Cold-Weather Starting Aids, Exhaust System |
| Electrical System & Electronic Control Units | 169-249 | Connectors, Charging Circuit, Starting Motor Circuit, Electrical Components, ECU Removal and Installation |
| Transmission (SyncroPlus / PowrReverser) | 250-599 | Shift Controls, PowrReverser Module, Gear Transmission, Range Transmission |
| Drive Systems | 600-820 | U-Jointed Shafts and Torsion Damper, Front-Wheel Drive Clutch, Differential (+3D Animation), Hydraulic Pump Drive, Final Drives (+3D Animation), Rear PTO |
| Steering and Brakes | 821-928 | Hydrostatic Steering, Rear Wheel Brakes, Handbrake, Hydraulic Trailer Brake |
| Hydraulic System | 929-1015 | Controls, Oil Filter and Hydraulic Pump, Valves, Hitch, Selective Control Valves (SCVs) and Couplers |
| Miscellaneous | 1016-1140 | Main Frame, Front/Rear Wheels and Fenders, Trailer Mounting and Swinging Drawbar, Hydraulic Pick-Up Hitch |
| Operator's Station | 1141-1169 | Controls and Instruments, 2-Post ROPS, Operator's Seat |
| Special Tools | 1170-1209 | Dealer-Fabricated Tools, Tools Available From the Dealer |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Type | turbocharged Diesel engine with intercooler | p. 33 |
| Bore | 106 mm (4.19 in.) | p. 33 |
| Stroke | 127 mm (5.00 in.) | p. 33 |
| Compression Ratio | 17.0:1 | p. 33 |
| Rated Engine Speed | 2300 rpm | p. 33 |
| Maximum Engine Power (97/68/EC) | 69 kW (94 hp) (6225) / 77 kW (104 hp) (6325) / 85 kW (115 hp) (6425) / 88 kW (120 hp) (6525) | p. 33 |
| Max. Torque | 393 Nm (300 lb.-ft.) at 1600 rpm (6225) / 433 Nm (319 lb.-ft.) at 1600 rpm (6325) / 477 Nm (352 lb.-ft.) at 1600 rpm (6425) / 485 Nm (358 lb.-ft.) at 1600 rpm (6525) | p. 33 |
| Electronic Fuel System Injection Pressure | up to approx. 135 MPa (1350 bar; 19580 psi) | p. 34 |
| Electrical System Battery | 12 V, 110 Ah | p. 34 |
| Electrical System Alternator | 14 V, 90 A | p. 34 |
| Hydraulic System Min. (stand-by) Pressure | 1250-1750 kPa (12.5-17.5 bar/181-254 psi) | p. 36 |
| Hydraulic System Max. Pressure | 20000 kPa (200 bar; 2900 psi) | p. 36 |
| Fuel Tank Capacity | 165 l (43.6 U.S.gal.) (6225-6425) / 207 l (54.6 U.S. gal.) (6525) | p. 37 |
| Engine Oil Capacity (with filter) | 16 L (4.2 US.gal.) (6225-6425) / 19.5 L (5.2 US.gal.) (6525) | p. 37 |
John Deere 6225, 6325, 6425, 6525 Common Problems This Manual Covers
Battery not charging, or the charge warning light stays on
Before pulling the alternator pulley, relieve drive belt tension and disconnect the battery negative cable per the procedure in this section. On reassembly, torque the pulley on the alternator shaft to 80 N.m (60 lb-ft) so it does not work loose and start the charge light flickering again.
Manual Section: Electrical System - Starting Motor Circuit p. 226Engine runs hot or keeps losing coolant after a top-off
These tractors run two coolant circuits that stay almost fully separated, so coolant loss after a top-off is often the connect/disconnect control left in the wrong position rather than a leak. The manual walks the bleed procedure and specs the drain plug torque at 4 to 5 N.m (3 to 3.7 lb-ft) so you do not crack it retightening.
Manual Section: Fuel, Air Intake, Cooling and Exhaust Systems - Cooling System p. 154Clutch pedal sits too high or too low, or the clutch drags or slips
The pedal free-play adjustment has a real printed number: distance (a) at the lower stop should be 51 mm +/- 1 mm (2 in. +/- 0.04 in.), set with the adjusting screw and locked with the lock nut torqued to 15 N.m (11 lb-ft). Get this wrong and the clutch either drags or never fully engages.
Manual Section: Transmission (SyncroPlus) - Perma Clutch II Module p. 292Rear brakes drag, feel spongy, or will not fully release
The manual gives an actual leak-test spec for the brake pistons: pressurize to 300 kPa (3 bar, 44 psi) and watch the gauge. A drop of more than 10 kPa (0.1 bar, 1.5 psi) in 10 seconds means the piston O-rings need replacing rather than another bleed and hope.
Manual Section: Steering and Brakes - Rear Wheel Brakes p. 909Frequently Asked Questions
What models and edition does this Repair Manual cover?
This is the John Deere TM401019 Repair Manual (June 2010) for the 6225, 6325, 6425 and 6525 tractors, Europe edition, exactly the model range and edition printed on the cover and Foreword. p. 5
Does this manual include wiring diagrams or electrical schematics?
No. It covers the electrical system's connectors, charging circuit, starting motor circuit and control unit removal and installation, but there are no wiring schematics in this Repair Manual. p. 169
Does it cover diagnostic trouble codes or how to reset a fault code?
No, this Repair Manual repeatedly points to a separate Diagnostic Manual for trouble codes and code based diagnosis. What is here is the hands on repair side: teardown, rebuild and torque specs. p. 136
Does it include full engine overhaul specs, like head-bolt torque?
It covers removing and installing the whole engine (Section 20), plus fuel, cooling and exhaust service. Internal engine teardown specs live in the separate PowerTech engine manual, not here. p. 91
What engines power these tractors?
6225, 6325 and 6425 share a turbocharged, intercooled 4.5 L 4-cylinder diesel (94 to 115 hp). The 6525 steps up to a turbocharged intercooled 6.8 L 6-cylinder diesel (120 hp). p. 33
