John Deere 2250, 2450, 2650, 2650N, 2850 Tractors Repair Technical Manual
- Manual Included:
- Repair Technical Manual: 947 Pages (TM4440)
- Specifications:
- Brand: John Deere
- Model: 2250, 2450, 2650, 2650N, 2850
- Type: Tractors
- Manuals: Repair Technical Manual
- Publication Numbers: TM4440
- Language: English
- Format: PDF
Other Manual: Operation and Test Manual: 591 Pages (TM4446)
John Deere 2250 2450 2650 2650n 2850
John Deere 1850 1850n 1950 1950n 2250
John Deere 1350 1550 1750
| Section | Subsection ID | Component / Focus | Unique Descriptor |
|---|---|---|---|
| Safety | 05 | Safety | Precautions & hazard prevention |
| Overview | 10 | Specifications | Technical data |
| Overview | 10 | Predelivery, Delivery & After-Sales | Inspection procedures |
| Overview | 15 | Lubrication & Service | Fluid maintenance |
| Overview | 20 | Tune-up | Performance optimization |
| Overview | 25 | Tractor Separation | Machine splitting points |
| Engine | 05 | Radiator, Viscous Fan Drive | Cooling assembly |
| Fuel & Air Intake | 05 | Fuel Tank, Auxiliary Tank & Water Trap | Storage & contaminant separation |
| Fuel & Air Intake | 10 | Cold Weather Starting | Winter ignition aids |
| Fuel & Air Intake | 15 | Speed Control Linkage | Throttle connection |
| Fuel & Air Intake | 20 | Air Cleaner | Filtration unit |
| Electrical System | 05 | Wiring Harnesses | Cable bundles & routing |
| Electrical System | 10 | Controls & Instruments (SG2 Cab) | SG2 cab interfaces |
| Electrical System | 15 | Controls & Instruments (Without Cab) | Non-cab operator devices |
| Electrical System | 20 | Controls & Instruments (MC1 Cab) | MC1 cab interfaces |
| Electrical System | 21 | Digital Speed-Hour-Meter | Display calibration |
| Electrical System | 25 | Lighting System | Illumination components |
| Electrical System | 30 | Starting Motor | Engine cranking device |
| Electrical System | 35 | Alternator | Charging output unit |
| Power Train | 05 | Clutch Operating Systems | Actuation linkage |
| Power Train | 10 | Single-Stage Clutch | Basic engine disengagement |
| Power Train | 15 | Dual-Stage Clutch | PTO & travel separation |
| Power Train | 20 | Hi-Lo Shift Unit | Range splitter |
| Power Train | 25 | Creeper Transmission | Ultra-low gearing |
| Power Train | 26 | Hydrostatic Creeper | Hydraulic ultra-low drive |
| Power Train | 30 | Transmission – Console Shift | Dash-mounted gear control |
| Power Train | 35 | Transmission – Center Shift | Floor-mounted gear control |
| Power Train | 40 | Synchronized Transmission & Oil Pump | Synchro gears & lubrication |
| Power Train | 45 | Collar Shift Transmission & Oil Pump | Sliding collar gears & lube |
| Power Train | 50 | Differential | Axle torque distribution |
| Power Train | 55 | Final Drives | Last reduction stage |
| Power Train | 60 | Independent PTO Shafts | Separate power take-off |
| Power Train | 65 | Continuous Running PTO | Always-active PTO |
| Power Train | 70 | Front PTO | Forward power outlet |
| Power Train | 75 | Front Wheel Drive (U.J. Shaft & Disk Clutch) | U-joint propulsion with clutch |
| Steering & Brakes | 05 | Hydrostatic Steering | Hydraulic direction (static) |
| Steering & Brakes | 10 | Steering Cylinder (Without FWD) | Non-FWD steering assist |
| Steering & Brakes | 15 | Power Steering | Hydraulic-assisted direction |
| Steering & Brakes | 20 | Manual Steering | Mechanical direction control |
| Steering & Brakes | 25 | Hydraulic Brakes | Fluid-actuated stopping |
| Steering & Brakes | 30 | Handbrake | Parking brake lever |
| Steering & Brakes | 35 | Hydraulic Trailer Brake | Tow-behind stopping system |
| Hydraulic System | 05 | Valves | Flow control devices |
| Hydraulic System | 10 | Hydraulic Pumps | Fluid displacement units |
| Hydraulic System | 15 | Rockshaft | Three-point lift arm |
| Hydraulic System | 25 | Selective Control Valves (Spool) | Spool-type remote valves |
| Hydraulic System | 30 | Selective Control Valves (Poppet) | Poppet-type remote valves |
| Hydraulic System | 35 | ISO Breakaway Couplers | Emergency disconnect fittings |
| Hydraulic System | 40 | ISO Quick Couplers | Rapid-connect fittings |
| Hydraulic System | 45 | Remote Cylinder | External actuator port |
| Miscellaneous | 05 | Front Axle | Steering & support beam |
| Miscellaneous | 10 | Front & Rear Wheels | Tire & rim assemblies |
| Miscellaneous | 15 | “AXLA” Pickup Trailer Hitch | Automatic coupling hitch |
| Miscellaneous | 20 | Height-Adjustable Trailer Hitch | Variable position tow bar |
| Operator’s Station | 05 | Refrigerant Handling | Safe chemical practice |
| Operator’s Station | 06 | Air Conditioning Service | HVAC maintenance |
| Operator’s Station | 07 | Compressor (Up to S/N 646 949L) | Early model AC pump |
| Operator’s Station | 08 | Compressor (From S/N 646 950L) | Later model AC pump |
| Operator’s Station | 09 | AC System Components | Condenser, evaporator, drier |
| Operator’s Station | 10 | Cab Ventilation & Heating (SG2) | SG2 cab climate |
| Operator’s Station | 15 | Cab Ventilation & Heating (SG2 Low-Profile) | Low-profile SG2 climate |
| Operator’s Station | 20 | Cab Ventilation & Heating (MC1) | MC1 cab climate |
| Operator’s Station | 25 | Operator’s Seats | Ride comfort assembly |
| Operator’s Station | 30 | SG2 Cab | Standard enclosure |
| Operator’s Station | 35 | MC1 Cab | Modular enclosure |
| Operator’s Station | 40 | 2-Post Roll Guard | Two-post protective frame |
| Operator’s Station | 45 | 4-Post Roll Guard | Four-post protective frame |