John Deere 850J-II Crawler Dozer Repair Technical Manual (TM14231X19)

John Deere 850J-II Crawler Dozer Repair Technical Manual (TM14231X19 18APR19)

This in-depth repair manual offers comprehensive teardown procedures, hydrostatic diagnostics, structural welding guidelines, and HVAC system servicing for the John Deere 850J-II crawler dozer. With detailed torque specs and system-level schematics, it is an essential tool for maintenance technicians and heavy equipment mechanics.

Model Covers:

John Deere 850J-II Crawler Dozer

Note: Includes full engine mounting, blade hydraulics, electrical troubleshooting, ROPS cab teardown, dealer tools and Integrated Grade Control (IGC) component repair.

File Format: PDF

Size: 18.51 MB

No. of pages: 466

Language: English

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

📑 Included Sections:

General Information

• Safety protocols per EU and Eurasian compliance
• Inch and metric torque charts for all fitting types and flange classes
• O-ring face seals, boss fittings, flare seats, and banjo service guidelines

Track System

• Track roller, carrier roller and idler servicing with wear and leakage tests
• Track chain disassembly, pin/bushing rotations, shoe and pivot replacements
• Track adjuster cylinder, recoil spring and frame overhaul

Axles and Final Drives

• Planetary carrier, ring gear and hub servicing with seal leakage inspections
• Axle reduction gears, bearing support and inner final drive housing rebuild

Transmission and Hydrostatic System

• Full hydrostatic pump and motor disassembly and calibration
• Displacement control valve, multifunction valve, and charge pump teardown
• Hydraulic Integrated Circuit (HIC) valve service and fan system diagnostics

Engine and Mounting

• Engine, flywheel and mount removal/install
• Fuel tank, auxiliary filters, muffler, glow plugs and exhaust configurations

Cooling & Auxiliary Systems

• Fan blade, shroud and cooling package service
• Brake pedal and speed control linkage inspection and rebuild

Park Brake and Linkage

• Brake removal, park lock linkage teardown and hydraulic circuit checks

Frame and Structure

• Welding repairs on frame, guard removal and counterweight handling

Operator Station

• Cab/ROPS removal, windowpane service, HVAC testing and R134a servicing
• Evaporator, condenser, compressor clutch and blower motor diagnostics

Blade and Dozer System

• Cutting edge, push beam, mechanical angle blade frame installations
• Hydraulic control valve service, pilot valve and IGC lever diagnostics
• Angle, tilt and quick-drop cylinder repairs

Ground Conditioning Tools

• Ripper installation and frame rework procedures

Dealer Fabricated Tools

• Includes lifting brackets, torque testers, pressure adapters and final drive fixtures

This John Deere 850J-II Dozer Manual enables advanced repair capabilities, system restoration, and internal diagnostics essential for crawler dozers operating under extreme construction or forestry workloads.