John Deere 840, 940, 1040 and 1140 Tractors Technical Manual (TM4353)

John Deere 840, 940, 1040 and 1140 Tractors Technical Manual (TM4353 01-Jun-82)

This comprehensive technical manual provides full-service procedures, detailed diagnostics, and component repair guidance for John Deere 840, 940, 1040, and 1140 agricultural tractors. Tailored for workshop use, it covers engine overhauls, powertrain systems, electrical schematics, fuel injection configurations, and hydraulic operations.

Model Covers:

This manual provides maintenance and repair data for:

John Deere 840, 940, 1040, and 1140 Tractors

Note: The service specifications, mechanical tolerances, and troubleshooting flows are essential for certified service professionals using specialized diagnostic equipment and tools.

File Format: PDF

Size: 40.58 MB

No. of pages: 774

Language: English

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

📑 Included Sections:

General

• Tractor specifications, tool requirements, inspection intervals, and tune-up procedures

Engine

• Cylinder head, crankshaft, pistons, valves, flywheel and timing gear diagnostics and repair
• Lubrication and cooling system maintenance with fault isolation procedures

Fuel and Air Intake System

• Diesel injection systems, nozzles, fuel pumps, and cold start aid servicing
• Air cleaner inspection, speed linkage, and fuel flow calibration

Electrical System

• Complete wiring diagrams, lighting system repairs, alternator and starter motor diagnostics
• Instrumentation controls and fault tracing with harness pin-outs

Power Train

• Transmission systems including synchronized, collar shift, Hi-Lo units, and oil pump operations
• Differential, final drives, PTO (independent and continuous-running), and clutch assembly

Steering and Brakes

• Manual and power steering configurations, brake system fault identification and service

Hydraulic System

• Rockshaft functions, selective control valves (spool and poppet), and hydraulic pump testing

Miscellaneous

• Front axle, wheels, hitch systems, belt pulley service, and axle trailer mechanisms

Operator’s Cab

• Cab ventilation, seating systems, roll guard maintenance, and structural inspection

This John Deere technical manual is essential for experienced technicians, service engineers, and field mechanics involved in servicing mid-range agricultural tractors with mechanical and hydraulic complexity.