Target Audience:
Owners, operators, and maintenance personnel of International Harvester 786, 886, 986, and 1086 tractors seeking to perform repairs and maintenance themselves.
Tractor Segment:
Mid-range row-crop and utility tractors, known for their power, durability, and versatility in various agricultural applications.
Value Proposition:
Enables cost savings by facilitating DIY repairs with easy-to-follow, step-by-step instructions, pictures, and wiring diagrams.
Manual Benefit:
Empowers users with knowledge to handle repairs, reducing reliance on external mechanics and increasing tractor uptime.
Market Competitors Era:
Competed with John Deere 40 series, Ford 6600/7600 series, Massey Ferguson 500/600 series, and Case 20/70 series tractors.
Systems Covered:
Engine, Transmission, Hydraulics, Electrical System, Fuel System, Cooling System, PTO, Steering, Brakes, Front Axle, Rear Axle, Operator Station, Chassis, Troubleshooting, Maintenance.
Estimated Page Count:
Comprehensive (Exact number not specified, but described as 'full professional quality in depth')
Manual Type:
Service Repair Manual (Workshop Manual)
Engine Coverage:
Detailed diagnostics, repair procedures, specifications, and maintenance for diesel engines (likely D-358, D-414, D-436, D-466 variants depending on specific model).
Transmission Coverage:
Repair and overhaul of transmissions, including powershift and synchronized gearboxes (e.g., T-18, T-22, T-23, 8-speed synchronized).
Hydraulic Coverage:
Troubleshooting, repair, and adjustment of the hydraulic system, including pumps, valves, cylinders, and Power Take-Off (PTO) engagement.
Electrical Coverage:
Wiring diagrams, troubleshooting guides for electrical components, starter, alternator, lighting, and instrumentation.
Steering System Coverage:
Detailed procedures for servicing hydrostatic power steering systems, including pump, cylinder, and linkage adjustments.
Brake System Coverage:
Diagnosis and repair of hydraulic brake systems, including master cylinder, slave cylinders, and brake pedal linkages.
Front Axle Coverage:
Maintenance and repair of the planetary or bevel gear front axle, including steering knuckle and kingpin service.
Rear Axle Drive Line Coverage:
Procedures for servicing the rear differential, final drives, and PTO drive components.
Routine Maintenance:
Oil change intervals, filter replacement, lubrication points, fluid capacities, pre-operation checks.
Major Repair Procedures:
Engine overhaul, transmission rebuild, hydraulic system repair, front and rear axle disassembly and assembly.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults across all major vehicle systems.
Engine Troubleshooting:
Diagnosing issues such as hard starting, excessive smoke, loss of power, and rough running.
Transmission Troubleshooting:
Addressing problems like gear grinding, clutch slippage, and power shift engagement issues.
Electrical Diagnostics:
Detailed fault finding for starting systems, charging systems, lighting circuits, and dashboard indicators.
Calibration Procedures:
Instructions for calibrating hydraulic systems, PTO engagement, and potentially engine fuel systems.
Depth Of Information:
In-depth, professional quality with step-by-step instructions, illustrations, and diagrams suitable for both experienced mechanics and owner-performed repairs.
Component Disassembly Assembly:
Detailed, illustrated instructions for taking apart and reassembling major components like the engine, transmission, and hydraulic pump.
Torque Specifications:
Comprehensive list of torque values for critical fasteners across all systems to ensure proper assembly and prevent component damage.
PDF Quality:
High-quality PDF, suitable for printing.
Searchability:
Likely searchable PDF, allowing for quick access to specific topics and keywords.
Media Type:
Digital Downloadable File
Printability:
Full printable. Users can print specific pages as needed.
Delivery Method:
Instant Download (Digital product)
Digital Requirements:
Requires Adobe PDF Reader.
Operating Systems:
Compatible with all versions of Windows & Mac.
Engine Options:
IH DT-358 (786, 886), IH DT-414 (986), IH DT-466 (1086). Exact engine varies by model and regional specifications.
Horsepower Range Net Flywheel Approx:
786: ~70 HP, 886: ~80 HP, 986: ~100 HP, 1086: ~120 HP (These are approximate and depend on specific configurations and testing standards.)
Engine Torque Approx:
Torque figures vary significantly by engine displacement but are generally robust, providing ample pulling power. (e.g., DT-466 could produce over 300 lb-ft torque).
Injection System:
Typically Bosch inline injection pumps or Roosa Master rotary pumps, depending on engine variant.
Compression Testing:
Includes specifications and procedures for performing compression tests to assess engine health.
Transmission Options:
Standard options often included an 8-speed synchronized gear transmission and a 16-speed synchronized transmission with a Power Shift (Hi-Lo) option. Some models also offered a full Power Shift transmission.
Power Shift Availability:
Available as an option on some models (e.g., 786, 886, 986, 1086) providing on-the-go gear changes.
Pto Options:
Standard PTO (540/1000 RPM) and optional 540/1000 RPM PTO, with independent or transmission-driven options.
Differential Lock:
Operated via a foot pedal or lever, aiding traction in challenging conditions.
Dashboard Features:
Basic instrumentation including tachometer, temperature gauge, oil pressure gauge, fuel gauge, and indicator lights. May include a simple AM/FM radio if equipped with a cab.
Operator Controls:
Mechanical and hydraulic assist steering, three-point hitch controls with draft and position control, PTO engagement lever, and gear shift levers. May include independent PTO engagement.
Operator Comfort Features:
Discussion of cab options which may include air conditioning, heating, suspension seats, and improved sound insulation compared to open-station models.
Power Take Off Rpm Options:
Standard 540 RPM and optional 1000 RPM PTO, with either ground-speed PTO or independent PTO (IPTO) functionality depending on the specific tractor configuration.
Engine Oil Change:
Typically every 250 hours or annually, whichever comes first (consult manual for exact specification for engine model).
Transmission Hydraulic Fluid Change:
Generally recommended every 1000-1200 hours or annually.
Air Filter Replacement:
Recommended replacement or cleaning based on operating conditions, often at 250-500 hour intervals or when indicated by a restriction indicator.
Engine Oil Viscosity:
Commonly API CD, SAE 15W-30 or 10W-30 depending on ambient temperature. (Refer to manual for precise specification).
Hydraulic Transmission Fluid:
IH Hy-Tran fluid or equivalent UTF (Universal Tractor Transmission) fluid is typically specified. Capacity varies by model and transmission type.
Coolant Type:
Typical recommendation of a 50/50 mix of permanent antifreeze and clean water, with specific IH coolant additive requirements potentially mentioned.
Grease Type:
Specifies types of grease for various lubrication points (e.g., lithium complex, EP grease).
Common Wear Items:
Hydraulic pump wear, PTO clutch wear, front axle pivot wear, and potential issues with older electrical components are common in aging tractors.
Preventive Maintenance Focus:
Regular hydraulic fluid and filter changes are crucial for longevity. Proper engine cooling system maintenance prevents overheating.
Common Engine Problems:
Potential for injector pump calibration drift, turbocharger wear (if equipped), and gasket leaks over time.
Transmission Maintenance Focus:
Maintaining the correct level and condition of Hy-Tran fluid is critical for the longevity of the transmission and hydraulic systems.
Manufacturer:
International Harvester (IH), a prominent American manufacturer of agricultural and construction equipment.
Company Legacy:
International Harvester was a foundational company in American agriculture, known for its robust and reliable machinery.
Series Context:
These tractors are part of the International Harvester 86 Series, which succeeded the 06 and 66 Series, introducing significant updates in comfort, power, and technology for their time.
Production Period:
The 86 Series tractors were primarily produced from the late 1970s into the early 1980s, with specific model years for each variant.
