John Deere 2250, 2450, 2650, 2650N and 2850 Tractors Repair Technical Manual (TM4440)

John Deere 2250, 2450, 2650, 2650N and 2850 Tractors Repair Technical Manual (TM4440 JAN-91)

Designed as a complete factory repair reference, this manual provides in-depth service data, diagnostic routines, and precise adjustment procedures for John Deere 2250, 2450, 2650, 2650N, and 2850 tractors. It covers inspection schedules, lubrication charts, tune-up methods, and tractor separation processes, with detailed system-level servicing for the engine, fuel and air intake, electrical components, transmissions, powertrain assemblies, hydraulics, steering, brakes, and operator’s station. Structured disassembly/assembly instructions and calibration charts ensure accurate servicing and restoration of performance.

Model Covers:

John Deere 2250, 2450, 2650, 2650N and 2850 Tractors

File Format: PDF

Size: 40.46 MB

No. of pages: 947

Language: English

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

📑 Included Sections:

General Information

• Specifications, lubrication charts, and tune-up procedures
• Predelivery, delivery, and inspection routines
• Tractor separation methods for servicing

Engine

• Cooling system servicing, radiator and viscous fan drive

Fuel and Air Intake System

• Fuel tank, auxiliary tank, and water trap servicing
• Cold start aids and speed control linkage adjustments
• Air cleaner servicing and diagnostics

Electrical System

• Harness layouts and wiring schematics
• Controls and instruments (SG2 cab, MC1 cab, open station)
• Digital speed-hour meter adjustment
• Lighting system, starting motor, and alternator servicing

Power Train

• Clutch systems: single-stage and dual-stage servicing
• Hi-Lo shift unit, creeper and hydrostatic creeper transmissions
• Console shift, center shift, synchronized, and collar-shift transmissions
• Differential, final drives, independent PTO, continuous PTO, and front PTO
• MFWD driveshaft and clutch servicing

Steering and Brakes

• Hydrostatic, power, and manual steering servicing
• Steering cylinder adjustments and repairs
• Hydraulic brakes, hand brake, and trailer brake systems

Hydraulic System

• Hydraulic valve servicing and pump diagnostics
• Rockshaft and front hitch adjustments
• Selective control valves (spool-type and poppet-type)
• ISO couplers and remote cylinder servicing

Miscellaneous

• Front axle, wheel servicing, and trailer hitch adjustments

Operator’s Station

• Safe refrigerant handling and A/C system servicing
• Compressors (early and late versions)
• Cab ventilation, heating (SG2 and MC1 cabs), and low-profile variants
• Operator’s seat servicing and cab structural repair
• 2-post and 4-post roll guard inspection

This John Deere Repair Technical Manual delivers factory-grade service methods, calibrated testing routines, and detailed troubleshooting procedures, ensuring precise maintenance and professional repair for the 2250, 2450, 2650, 2650N, and 2850 tractors.