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Part of the John Deere Repair Manuals.
This 743-page John Deere 6800, 6900 Technical Manual PDF (OEM #TM4516) puts both tractors' full factory service data in one place, covering engine through cab. You get the complete PowrQuad Module and Range Transmission rebuild sequence, front and rear PTO procedures, MFWD clutch service, and a full electrical section with charging circuits, starting motor circuits, and connector-level harness diagnostics. Open to exploded views across drive systems, step-by-step procedures for hydrostatic steering and wet disc brakes, and a dedicated special tools section listing adapters by part number. The 6800 puts out 88 kW (120 hp), the 6900 steps to 96 kW (130 hp); replace brake discs below 5.5 mm (0.216 in.) and torque the starter terminal 30 hex nut to 30 N-m (23 lb-ft). Your PowrQuad is apart and you need the number now. Bookmarked by chapter, searchable by keyword: open on any device and get to work.
What's Inside This John Deere 6800, 6900 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-16 | - |
| General Information | 17-50 | Specifications, Tune-Up, Predelivery Inspection |
| Engine | 51-70 | Engine Removal and Installation |
| Fuel, Air Intake and Cooling System | 71-94 | Speed Control Linkage, Fuel System, Air Intake System, Cooling System, Cold Weather Starting Aids |
| Electrical System | 95-150 | Connectors, Wiring Harnesses, Charging Circuit, Starting Motor Circuit, Switches, Relays and Solenoids, Monitoring System |
| Powrquad Transmission | 151-266 | PowrQuad Module, Creeper Transmission, Range Transmission, Transmission Controls, PowrQuad Module Repair, Range Transmission Repair |
| Drive Systems | 267-406 | Differential Housing, Rear PTO, Final Drives, Front-Wheel Drive Clutch, Front PTO, U-Jointed Shafts and Torsion Damper |
| Steering and Breakes | 407-494 | Hydrostatic |
| Hydraulic System | 495-594 | - |
| Misc. | 595-640 | - |
| Operator’S Cab and 4-Post ROPS | 641-732 | - |
| Special Tools | 733-738 | DFRW29, Final Drive Housing Adapter, DFRW30, Axle Jacking Tool, Piston Holding Tool, Holding Device, Shifter Rail Detent Holding Tool |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Planetary pinion rolling drag torque (new bearings) | 0.6—3.0 N-m (6—24 in-lb) | p. 337 |
| Brake disk minimum thickness | 5.5 mm (0.216 in.) | p. 457 |
| Starter motor, hex. nut at terminal 30 torque | 30 N-m (23 Ib-ft) | p. 117 |
| Valve clearance, intake valves | 0.35 mm (0.014 in.) | p. 19 |
| Cooling system - changing coolant | 15.5 L (4.1 US.gal.) | p. 26 |
| Engine crankcase - oil change with filter | 17.0 L (4.5 US.gal.) | p. 26 |
| Transmission/hydraulic system - oil change with filter | 56.0 L (14.8 US.gal.) | p. 26 |
| Air conditioning system (R134a refrigerant) | 1.3 kg (2.86 lb) | p. 26 |
| Cable to terminal 30 of starting motor, hex. nut torque | 30 N-m (23 lb-ft) | p. 54 |
| 6800 | ||
| Engine power | 88 kW (120 hp) | p. 19 |
| Fuel tank capacity | 207 L (54.6 US.gal.) | p. 26 |
| 6900 | ||
| Engine power | 96 kW (130 hp) | p. 19 |
John Deere 6800, 6900 Common Problems This Manual Covers
John Deere 6800 tractor will not go forward in any gear but operates normally in reverse p. 26
Drain the transmission and hydraulic system before inspecting the traction clutch valve and forward engagement plates. Fill the system with exactly 56.0 L (14.8 US.gal.) of fresh fluid as noted on page 26. Inspect the PowrQuad module for damaged internal clutch components.
Manual Section: PowrQuad Transmission Module RepairWet disc brakes feel spongy or fail to engage completely when pressing the pedal p. 457
Remove the rear wheel brakes and carefully measure the friction plates. Replace the internal components if they measure below the brake disk minimum thickness of 5.5 mm (0.216 in.) detailed on page 457. Bleed the system thoroughly to remove trapped air before field testing.
Manual Section: Brake System RepairEngine turns over slowly or starting motor clicks loudly when turning the key in cold weather p. 117
Inspect the battery cables and starting motor connections for heavy corrosion. Torque the hex nut at terminal 30 on the starter motor to exactly 30 N-m (23 lb-ft) as specified on page 117. Verify the batteries are fully charged before attempting another start.
Manual Section: Electrical System - Switches, Relays, Solenoids, and Fuses RepairFront axle makes a loud rubbing noise when turning left or right under heavy load p. 337
Disassemble the MFWD epicyclic wheel hubs and inspect the planetary gears for severe wear. Adjust the new bearings to achieve a planetary pinion rolling drag torque of 0.6 to 3.0 N-m (6 to 24 in-lb) according to page 337. Replace any scored or damaged thrust washers.
Manual Section: Drive Systems - Differential RepairFrequently Asked Questions
Torque specs for John Deere 6900 transmission housing bolts?
For the John Deere 6900, the cap screws for the PowrQuad module housing to the creeper housing should be tightened to 70 N-m (50 Ib-ft). The cap screws for the range transmission housing to the differential housing require a torque of 90 N-m (66 Ib-ft).
How do you fix john Deere 6800 tractor will not go forward in any gear but operates normally in reverse?
Drain the transmission and hydraulic system before inspecting the traction clutch valve and forward engagement plates. Fill the system with exactly 56.0 L (14.8 US.gal.) of fresh fluid as noted on page 26. Inspect the PowrQuad module for damaged internal clutch components.
How do you fix wet disc brakes feel spongy or fail to engage completely when pressing the pedal?
Remove the rear wheel brakes and carefully measure the friction plates. Replace the internal components if they measure below the brake disk minimum thickness of 5.5 mm (0.216 in.) detailed on page 457. Bleed the system thoroughly to remove trapped air before field testing.
How do you fix engine turns over slowly or starting motor clicks loudly when turning the key in cold weather?
Inspect the battery cables and starting motor connections for heavy corrosion. Torque the hex nut at terminal 30 on the starter motor to exactly 30 N-m (23 lb-ft) as specified on page 117. Verify the batteries are fully charged before attempting another start.
What format is this manual in?
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