🏷️ Basic Information Identification Make: International Harvester Model: 21256 Tractor Product Type: Service Repair Manual 👋 Introduction Market Position Tractor Segment: Utility Tractor Competitive Analysis Competitors: During its production era, the IH 21256 would have competed with models from John Deere, Ford, Massey Ferguson, and Case IH. Key Features Durability: International Harvester tractors are renowned for their robust construction and longevity. Versatility: Designed for a wide range of agricultural tasks, from plowing to harvesting and general farm work. Mechanical Simplicity: Often featured straightforward mechanical systems, making them relatively easier to service with the right documentation. 📋 Manual Details Coverage Areas Primary Coverage: Complete service and repair for the International Harvester 21256 Tractor Page Count Estimated Pages: Varies based on specific edition, but comprehensive service manuals typically range from 500-1500 pages. Manual Type Type: Service and Repair Manual Language Language: English Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Engine Repair: Detailed procedures for engine overhaul, diagnosis, tuning, and component replacement. Transmission And Drivetrain: Coverage of clutch, gearbox, differential, final drives, PTO (Power Take-Off) systems. Hydraulic System: Repair, maintenance, and troubleshooting of the hydraulic pump, cylinders, valves, and fluid system. Electrical System: Wiring diagrams, component testing, charging system, starting system, lighting, and instrument panel. Fuel System: Diesel injection system service, fuel filters, fuel tank and lines. Cooling System: Radiator, fan, thermostat, water pump, and coolant specifications. Braking System: Service and repair of mechanical and hydraulic braking components. Steering System: Diagnosis and repair of steering linkage and components. Chassis And Frame: Inspection and repair of the tractor frame and chassis components. Operator Station: Seat, controls, and dashboard assembly. Procedures Included Routine Maintenance: Oil changes, filter replacements, lubrication points, and general inspection procedures. Diagnostic Troubleshooting: Systematic approaches to identify and resolve common and uncommon issues. Component Overhaul: Detailed instructions for complete disassembly, cleaning, inspection, and reassembly of major components. Adjustment And Calibration: Procedures for setting clearances, timing, fluid levels, and control linkages. Special Tool Requirements: Identification and usage of specialized tools for specific repair tasks. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds. 📊 Manual Specifications File Format Digital Format: PDF Print Quality Quality: High-resolution scans of original factory manuals, ensuring clear diagrams and text. Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Likely a diesel engine, common for IH tractors of this class. Specific displacement and model will vary. Performance Horsepower: Estimated range typically between 40-70 PTO horsepower, depending on the specific engine variant and configuration. Torque: Torque figures would be optimized for farm implement power requirements. Fuel System Fuel Type: Diesel Injection System: Likely a Bosch or Simms inline injection pump system. 🔧 Transmission Standard Transmission Type: Likely a manual transmission, potentially with multiple ranges (e.g., 8-speed or 16-speed). A range splitter or creeper gear might be an option. Optional Optional Features: Possible options might include a live PTO or specific transmission configurations for different implement requirements. Features Pto Speed: Standard PTO speeds (e.g., 540 RPM or 1000 RPM) are expected, with options for live PTO. 📐 Dimensions Exterior Wheelbase: Varies by configuration, but typical for utility tractors of the era. Weights Operating Weight: Estimated operating weight would be in the range of 4,000-6,000 lbs (1,800-2,700 kg). 🛡️ Safety Features Ratings Rollover Protection: Original models may not have included factory ROPS (Rollover Protective Structure), but aftermarket options are often available. The manual will detail if factory ROPS was an option. Active Features Brake System: Typically mechanical or hydraulic drum brakes, or potentially disc brakes on later models. Passive Features Operator Station Design: Ergonomic considerations for the operator's safety and comfort, though less advanced than modern standards. 💡 Technology Features Infotainment Infotainment System: Basic operator instrumentation; no infotainment system typical for the era. Driver Assistance Driver Assistance Features: Limited to mechanical aids for operation; no electronic driver assistance. Connectivity Connectivity Options: None. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 100-250 operating hours, depending on operating conditions. Manual will specify. Fuel Filter Replacement: Recommended every 250-500 operating hours or as needed based on fuel quality. Manual will specify. Hydraulic Fluid Change: Typically annually or every 500-1000 operating hours. Manual will specify. Fluid Specifications Engine Oil Grade: Likely API CD or CE rated diesel engine oil, SAE 15W-40 or 30. Manual will provide exact specifications. Hydraulic Fluid Type: Tractor Hydraulic Fluid (THF) or a suitable universal tractor transmission oil (UTTO). Manual will specify. Coolant Type: Ethylene glycol based antifreeze mixture, typically 50/50 with distilled water. Manual will provide. Known Issues Engine Wear: As with any older diesel, potential for injector wear, ring wear, and head gasket issues. Hydraulic Leaks: Common in older tractors due to seal degradation and wear on hydraulic components. Transmission Synchronizers: Wear on synchronizers in manual transmissions can lead...