1981 John Deere 650 & 750 Tractors Technical Manual
This technical manual provides detailed information for the John Deere 650 & 750 tractors, including maintenance procedures and specifications for engine, fuel, and lubrication systems. Features part number JD-TM1242.
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Models Covered & Key Technical Specifications
John Deere 650 & 750 Tractors (TM-1242) - 1981 Technical Manual | Series Tractor
- Maximum Assembly Torques: 133 N·m (98 ft-lbs) are required for the front wheel bolts.
- Specific Liquid Volume: For the transmission-hydraulic system, 13 L (14 U.S. qt.) defines the capacity.
- Critical Temperature Range: 71°C (160°F) signifies the thermostat opening point.
- Rated Fastener Specs: The cylinder head cap screws require 45 N·m (34 ft-lbs) for proper installation.
- Fundamental Play Limits: 0.03 mm (0.0012 in.) defines the flywheel clutch surface limit.
- Specific Operational Speed: Engine oil pressure of 248.393 kPa (36-57 psi) is the standard operating requirement.
Professional Workshop Service Manual & Technical Specifications
John Deere 650 & 750 Tractors Technical Manual: 1981 John Deere 650 & 750 Tractors - Official Service, Repair & Maintenance Guide Transmission-Guide
Engineering-Metrics: 1981 John Deere 650 & 750 Tractors // Performance-Values: Tractor / Engine Logic // Engineering-Metrics: technical-details.
| Assessment-Parameter | Baseline | Architecture |
|---|---|---|
| PTO Horsepower | 10.8 kW (14.5 hp) | 13.4 kW (18.0 hp) |
| Engine Displacement | 0.9 L (52.0 cu. in.) | 0.9 L (52.0 cu. in.) |
| Fuel Tank Capacity | 23.5 L (6.2 U.S. gal.) | 23.5 L (6.2 U.S. gal.) |
| Cooling System Capacity | 3.5 L (3.7 U.S. qt.) | 3.5 L (3.7 U.S. qt.) |
| Hydraulic System Pressure | 13790 kPa (2000 psi) | 13790 kPa (2000 psi) |
| Tire Size (Rear) | 13.6-16 | 13.6-16 |
Engineering chapters address the core systems of the John Deere 650 and 750 tractors. This manual covers diagnostic procedures, component removal and installation, and specifications. It details the engine, fuel system, electrical system, transmission, and hydraulic systems, providing essential information for maintenance and repair.
Engine Repair: This section details the diagnosis and repair of engine malfunctions, including valve train, cylinder head, and crankshaft components. It covers procedures for checking and adjusting valve clearance, inspecting and repairing rocker arms, and overhauling the cylinder head.
Fuel and Repair: The fuel and repair section outlines procedures for the diesel fuel system, including replacing the fuel filter, servicing the injection pump, and adjusting pump timing. It also covers air intake system maintenance.
Lubrication System: This part of the manual documents all lubrication services, specifying intervals, capacities, and lubricants for various components like the engine, transmission, and front axle. It includes procedures for checking and changing oil and filters.
Specifications and Special Tools: This section provides detailed specifications for various tractor components and lists the special tools required for specific repair procedures. It includes torque values and wear tolerances for critical parts.
It documents torque specifications for engine components to ensure proper seal compression uniformity.
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