John Deere 640D Skidder & 648D Grapple Skidder Technical Manual
This technical manual provides comprehensive service and repair procedures for the John Deere 640D Skidder and 648D Grapple Skidder, covering all aspects from removal to installation. Ref: TM1440
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Models Covered & Key Technical Specifications
John Deere 640D Skidder & 648D Grapple Skidder (TM1440) -- 1990
Covers 640D Skidder and 648D Grapple Skidder Service Procedures | Technical Manual Suite.
- Technical Resolution Data: 794 kg (1750 lb) is the approximate weight of the front differential and axle assembly.
- Specific Temperature Range: For optimal hydraulic system operation, 36-44°C (97-111°F) is the recommended oil temperature.
- Essential Power Rating: 2000 psi is the maximum hydraulic system operating pressure for the 640D Skidder.
- Advanced Memory Capacity: The hydraulic system has a displacement pump capacity of 25 gpm (95 L/min) for standard operation.
- Core Speed Performance: Net engine power is rated at 128 hp (95 kW) at 2200 rpm.
- Designated Torque Values: 908 N-m (670 lb-ft) is the specified torque for rear axle-to-frame nuts.
Professional Workshop Service Manual & Technical Specifications
Precision Calibration Manual: John Deere 640D Skidder Technical Manual for John Deere 640D Skidder & 648D Grapple Skidder - Comprehensive Service & Repair Procedures Specification-Guide
Product-Line: John Deere // Conceptual-Layout: Transmission and Axle Specifications / Hydraulic System Logic // Diagnostic-Area: Torque Values. Following OEM groupings, the manual includes detailed information on engine, chassis, hydraulic systems, brakes, and more.
- General Specifications: Provides dimensional data, weights, and capacities.
- Torque Values: Details specific torque settings for various fasteners and components.
- Fuels and Lubricants: Outlines fuel type recommendations and lubrication schedules.
- Axles and Suspension System: Covers removal, installation, and specifications for axles and differentials.
- Transmission: Details removal, installation, and component-specific procedures for the transmission system.
This manual documents torque specifications for flange face sealing to ensure proper assembly. Factory specifications are documented for precise component installation and alignment, ensuring optimal performance and longevity of the equipment.
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