The International Harvester 986 Tractor, produced from 1976 to 1979, represents a significant piece of agricultural machinery known for its robust build and reliable performance. Powered by a D-358 naturally aspirated, 6-cylinder diesel engine, this tractor delivered approximately 98 PTO horsepower, making it a capable workhorse for various farming and operational tasks. Its engineering quality is reflected in its sturdy construction, including a Duplex Synchromesh gearbox and a standard 540/1000 RPM PTO, with an optional Power Shift Transmission available. The 986 was designed with operator efficiency in mind, featuring hydraulic power steering and an ergonomically designed operator station. Its industry impact is recognized for its strong performance within its horsepower class, solidifying its reputation as a dependable tractor. This comprehensive Workshop Service Manual (WSM) is designed to provide in-depth service and repair information for the International Harvester 986 Tractor. It covers all essential areas, including detailed overhaul and diagnostics for the engine, transmission, hydraulics, and electrical systems, along with specific guidance on steering, brakes, chassis, and body components. The manual offers step-by-step repair instructions, disassembly and assembly procedures, and adjustment guidelines, supported by clear illustrations and wiring diagrams to aid in troubleshooting. Routine maintenance schedules, fluid specifications, and common wear item identification are also included, empowering tractor owners, mechanics, and DIY enthusiasts to effectively maintain and repair their equipment, ultimately saving costs and ensuring optimal performance. 🏷️ Basic Information Identification Make: International Harvester Model: 986 Tractor Codes Model Code: 986 👋 Introduction Market Position Target Audience: Tractor Owners, Mechanics, DIY Enthusiasts Competitive Analysis Value Proposition: Empowers users to perform their own repairs, saving significant costs Key Features Ease Of Use: Easy-to-follow, step-by-step instructions Information Access: Provides comprehensive information for all service and repair needs Knowledge Enhancement: Makes users up-to-date and knowledgeable about their tractor 📋 Manual Details Coverage Areas Primary Focus: Service and Repair Additional Coverage: Routine Maintenance, Troubleshooting, Wiring Diagrams Page Count Estimated Pages: Comprehensive (Specific count not provided, but described as 'in depth') Manual Type Type: Workshop Service Manual (WSM) Language Language: English Format File Format: PDF Delivery Method: Instant Download Print Capability: Full Printable Software Requirements: Adobe PDF Reader Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine: Detailed overhaul, diagnostics, fuel system, cooling system, lubrication system Transmission: Power Shift, Gearbox, PTO, Differential, Drive Axles Hydraulics: Hydraulic pump, control valves, cylinders, remote couplers, linkage Electrical System: Starting and charging system, lighting, instruments, wiring diagrams Steering: Power steering system, components, and troubleshooting Brakes: Brake system components, service, and adjustments Chassis And Body: Frame, fenders, operator station, hitches Procedures Included Maintenance: Scheduled maintenance, lubrication, fluid changes, filter replacements Repair: Step-by-step repair instructions for all major components and systems Troubleshooting: Diagnostic procedures for common and uncommon issues Disassembly And Assembly: Detailed instructions for component removal and reinstallation Adjustments: Calibration and adjustment procedures for various systems Technical Depth Depth: Professional Quality, In-depth, All areas of repair Illustrations: Includes pictures and diagrams Wiring Diagrams: Provided for electrical system troubleshooting 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Full Printable Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Model: D-358 Diesel Engine Type: Naturally Aspirated, 6-Cylinder Diesel Displacement: 358 cubic inches (5.86 Liters) Performance Horsepower Rated: Approximately 98 PTO horsepower (may vary slightly by configuration) Torque Peak: Specifications vary, refer to manual for precise figures Fuel System Fuel Injection: Bosch inline injection pump Fuel Type: Diesel Cooling System Coolant Type: Ethylene Glycol based (specific mixture and capacity detailed in manual) Lubrication System Oil Type: API CD or CES 20071 rated diesel engine oil (viscosity per manual, typically 15W-40) 🔧 Transmission Standard Transmission Type: Duplex Synchromesh Gearbox Optional Optional Transmission: Power Shift Transmission (optional on some configurations) Features Gear Selection: Multiple forward and reverse gears (specific number depends on configuration, typically 12 forward, 4 reverse) Pto: Standard 540/1000 RPM PTO (Power Take-Off) Transmission Fluid: Hy-Tran Plus or equivalent (IH Spec B-6 specification) 📐 Dimensions Exterior Wheelbase: Approx. 92.5 inches (2350 mm) Overall Length: Approx. 145 inches (3683 mm) Overall Width: Approx. 72 inches (1829 mm) at rear track Weights Operating Weight: Approx. 7,900 lbs (3583 kg) (configuration dependent) Front Tire Size: Commonly 7.50-16 (manual will specify variations) Rear Tire Size: Commonly 18.4-34 (manual will specify variations) 🛡️ Safety Features Ratings Rollover Protection: ROPS (Roll-Over Protective Structure) available as an option; manual covers its inspection and maintenance. Active Features Braking System: Hydraulic disc brakes Passive Features Operator Station: Ergonomically designed operator station for operator comfort and safety 💡 Technology Features Infotainment Operator Interface: Basic dashboard with essential gauges for engine monitoring (oil pressure, coolant temperature, ammeter, tachometer). Driver Assistance Power Steering: Standard hydraulic power steering system for ease of operation. Connectivity Lighting: Standard work lights and road lights depending on configuration. 🔧 Maintenance Service Intervals Engine Oil...