🏷️ Basic Information Identification Make: International Harvester Model: 986 Tractor Product Name: International Harvester 986 Tractor Factory Service Repair Manual Codes Product Type: Factory Service Repair Manual 👋 Introduction Market Position Segment: Heavy-duty agricultural tractor Key Features Convenience: Easy downloading and immediate access for repairs Cost Savings: Enables significant cost savings on repairs by empowering self-service Knowledge Acquisition: Provides in-depth vehicle knowledge for emergencies and routine maintenance Accessibility: Repair anytime, anywhere, on any compatible device Information Layout: Well-organized with a table of contents for easy navigation 📋 Manual Details Coverage Areas Primary Coverage: Service, repair, and maintenance of the International Harvester 986 Tractor Specific Components: Engine, transmission, hydraulics, electrical system, steering, brakes, PTO, hitch, front axle, final drives, operator station. Page Count Estimated Page Count: Extensive (specific page count not provided in source, but implied by 'comprehensive' and detailed coverage) Manual Type Type: Factory Service Repair Manual / Workshop Manual / Troubleshooting Guide Purpose: A comprehensive guide for diagnosing, repairing, and maintaining the International Harvester 986 Tractor. Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Detailed repair, diagnostics, and overhaul of the engine systems Transmission: Service and repair of the transmission, including clutch and gearbox Hydraulics: Comprehensive coverage of the hydraulic system, including pump, valves, and cylinders Electrical: Detailed wiring diagrams and electrical system diagnostics Fuel System: Service and troubleshooting of the fuel injection system Cooling System: Maintenance and repair of the cooling system components Braking System: Service and repair of the braking system, including hydraulic and mechanical aspects Steering System: Repair and adjustment of the steering mechanism, including power steering Powertrain: All aspects of powertrain maintenance and repair Chassis: Frame, axle, and suspension service Operator Station: Service and repair of the operator's cab and controls Power Take Off: Service and maintenance of the PTO system. Hitch System: Operation and repair of the tractor's three-point hitch system. Procedures Included Maintenance: Scheduled maintenance procedures and intervals Troubleshooting: Comprehensive troubleshooting guides for common and uncommon issues Repair: Detailed step-by-step repair procedures for all major components Rebuilds: Full engine, transmission, and hydraulic system rebuild instructions Diagnostics: Advanced diagnostic techniques and fault finding Adjustments: Calibration and adjustment procedures for various systems Installation: Guidance on component installation and replacement Wiring Diagrams: Detailed electrical system wiring diagrams for troubleshooting and repair. Torques Specs: Critical torque specifications for fastener tightening. Schematics: Hydraulic and electrical schematics to understand system flow and operation. Technical Depth Depth: Factory-level, comprehensive coverage suitable for professional technicians and experienced owners Detail Level: In-depth technical explanations, specifications, and diagrams Diagnostic Tools: Information on required special tools and diagnostic procedures. 📊 Manual Specifications File Format Digital Format: PDF (Requires Adobe PDF Reader) Compatibility: Compatible with all Windows and Mac versions Print Quality Searchability: Searchable text for quick information retrieval Binding Type Binding: N/A (Digital download) Paper Type Paper Quality: N/A (Digital download) ⚙️ Engine Specifications Primary Engine Engine Model: International Harvester DT-466 (6-cylinder diesel) Displacement: 466 cubic inches (7.6 liters) Fuel Type: Diesel Engine Block Type: Cast iron, wet sleeve cylinder liners Performance Horsepower Rated: Approximately 110-120 PTO horsepower (varies slightly by specific configuration) Torque Peak: High torque output, typical for its class Fuel System Injection Type: Direct injection, typically rotary or inline pump injection system Fuel Pump Type: Typically a Bosch inline or rotary injection pump 🔧 Transmission Standard Transmission Type: International Harvester 16-speed Power Shift (or optional manual transmission) Gear Ranges: 16 forward, 8 reverse (with powershift) Features Powershift Operation: Electro-hydraulic control for on-the-go shifting 📐 Dimensions Exterior Wheelbase: Approx. 102 inches (2590 mm) Weights Operating Weight: Approx. 9,500 - 11,000 lbs (4300 - 5000 kg) depending on configuration 💡 Technology Features Infotainment Operator Interface: Focus on functional controls and instrumentation, not modern infotainment systems. Driver Assistance Assistance Features: Basic operator aids such as PTO engagement, draft control, and potentially external hydraulic remotes. No electronic driver assistance in the modern sense. Connectivity Connectivity Features: None. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 250 hours or annually Air Filter Replacement: Based on operating conditions, check frequently Fuel Filter Replacement: Recommended at regular intervals, e.g., annually or every 250 hours Fluid Specifications Engine Oil: API CD or CE rated diesel engine oil, SAE 15W-40 recommended for most conditions Hydraulic Fluid: IH Hy-Trans fluid or equivalent (refer to manual for specific type and viscosity) Transmission Fluid: Refer to manual, often same as hydraulic fluid in powershift transmissions Coolant: Permanent type antifreeze/coolant, 50/50 mix with water Known Issues Common Problems: Potential for wear in powershift transmission components, hydraulic pump issues, and fuel system wear over time. Engine cylinder liners can be prone to cavitation if coolant maintenance is neglected. 📚 Vehicle History Brand Heritage Manufacturer Legacy: International Harvester (IH) was a major American manufacturer of agricultural machinery and vehicles, known for its robust and reliable equipment. Model Evolution Series Placement: The...