John Deere 750J, 850J Crawler Dozer Repair Technical Manual (TM2261)

John Deere 750J, 850J Crawler Dozer Repair Technical Manual (TM2261 10FEB06)

This comprehensive repair manual provides detailed service procedures for the John Deere 750J and 850J crawler dozers. Includes disassembly, inspection, and installation of hydrostatic transmissions, final drives, engine components, undercarriage, HVAC, blade systems, and operator station assemblies.

Model Covers:

John Deere 750J and 850J Crawler Dozers

File Format: PDF

Size: 14.43 MB

No. of pages: 498

Language: English

Delivery Method: Instant Download - Access your file immediately after purchase.

📑 Included Sections:

General and Safety Information

• Extensive safety practices and emergency procedures
• Detailed torque values and fitting service recommendations
• Instructions for hazardous fluid handling and welding precautions

Track Systems

• Complete teardown and inspection of rollers, links, guides, crossbars
• Track sag and tensioning, pitch inspection and chain lubrication service
• Front idler, recoil spring, and track adjuster disassembly and installation

Axles and Final Drive

• Planet carrier, ring gear and reduction housing service and rebuild
• Lift brackets, oil seals, bearings and shaft reconditioning

Transmission and Hydrostatic System

• Disassembly of hydrostatic pump and motor, PDCV and charge pump
• Control linkage and transmission lever teardown and calibration
• Fan pump, reversing valve, and multi-function valve testing

Engine and Related Systems

• Engine mount, flywheel, oil pan and full engine R&I
• Cooling system removal: fan, guards, radiator, shroud
• Fuel tank, exhaust system and cold start aids servicing

Park Brake and Dampener Drive

• Park brake disassembly, hydraulic valve and linkage service
• Dampener drive component access and maintenance

Cabin and Operator’s Station

• Cab/ROPS removal, window repairs, seat and belt servicing
• HVAC R134a flushing, charging, valve and compressor maintenance

Frame and Structure

• Frame separation, counterweight installation and welding repair
• Chassis weight and bottom guard removal and install

Blade and Hydraulic Equipment

• Angledozer and PAT blade teardown and reassembly
• Hydraulic cylinder service: lift, angle, tilt, pilot and control valves
• Quick-drop, reservoir, and control valve inspection and rebuild

Electrical and Safety Systems

• Reverse alarm volume adjustment, horn replacement

Dealer Fabricated Tools

• Special lifting tools, torque adapters and hydrostatic motor fixtures

For complete service information, also see:

750J, 850J Crawler Dozer Operation and Test .......... TM2260
750J, 850J Crawler Dozer Operator’s Manual .......... OMT202117
Alternators and Starting Motors .......... CTM77
POWERTECH 4.5 L and 6.8 L Diesel Engines — Base Engine .......... CTM104
POWERTECH 4.5 L and 6.8 L Diesel Engines — Level 12 Electronic Fuel System with DE10 Pump .......... CTM331
POWERTECH 8.1 L Diesel Engines — Base Engine .......... CTM86
POWERTECH 8.1 L Diesel Engines — Level 9 Electronic Fuel System with High Pressure Common Rail .......... CTM255
Super Caddy Oil Cleanup Procedure .......... CTM310
120 Series Hydraulic Cylinders .......... TM-H120A
125 Series Hydraulic Cylinders .......... TM-H125A
Service ADVISOR System Computer Connection .......... T133991
Undercarriage Appraisal Manual .......... SP326
Specifications Manual .......... SP458

This John Deere 750J and 850J Dozer Repair Manual provides full mechanical service coverage across transmission, blade systems, drivetrain, and HVAC components. Ideal for service professionals restoring machine performance.