Target Audience:
Owners and technicians of IH International Harvester 786, 886, 986, and 1086 tractors
Segment:
Medium horsepower agricultural tractors, suitable for a wide range of farming tasks from fieldwork to hauling.
Value Proposition:
Provides comprehensive, factory-level repair and maintenance information, saving owners significant costs compared to professional servicing. Enables in-depth understanding of the tractor's systems.
Manual Attributes:
Hundreds of pages, detailed substeps, notes/cautions/warnings, numbered instructions, bold figure numbers, detailed illustrations/drawings/photos, enlarged insets, numbered table of contents, electrical system troubleshooting and wiring diagrams.
Benefit To Owner:
Enables owners to maintain their tractor in optimal working condition, prolong its lifespan, and perform repairs efficiently, leading to significant cost savings.
Covered Models:
International Harvester 786, 886, 986, 1086 Tractors
Estimated Page Count:
Hundreds of pages (specific count not provided, but implied extensive)
Type:
Official Factory Service Repair Manual / Workshop Manual
Powertrain:
Engine, Cooling System, Fuel System, Power Train, Clutch, Transmission, Final Drive, Rear Axle, Front Axle, Front-Wheel Drive, Main Drive Bevel Gears And Differential
Chassis And Body:
Brakes, Fenders, Fuel Tank & Platform, Front System, Steering Gear
Hydraulics And Electrical:
Hydraulic System, Electrical System, Power Steering System, Power Take-Off (PTO)
Differential Lock:
Detailed information on the operation, maintenance, and repair of the differential lock system.
Park Brake:
Specific procedures for the inspection, adjustment, and repair of the park brake mechanism.
Front Axle Drive:
If equipped with MFWD (Mechanical Front Wheel Drive), the manual will cover its specific components, maintenance, and repair.
General Specifications:
Includes overall tractor specifications, dimensions, weights, torque values, and clearances for various components.
Repair And Maintenance:
Complete disassembly and reassembly, detailed repair procedures, step-by-step instructions, troubleshooting, diagnosis, component replacement
Specific Procedures:
Engine overhaul, transmission repair, hydraulic system servicing, brake adjustments, electrical system diagnostics, PTO clutch adjustment, front axle alignment
Diagnostic Procedures:
Troubleshooting guides for various systems, including engine performance issues, hydraulic system faults, transmission problems, and electrical malfunctions, supported by specific tests and measurements.
Component Rebuild:
Detailed instructions for rebuilding major components such as the engine, transmission, hydraulic pump, and steering system.
Depth:
Comprehensive (from basic maintenance to complete rebuilds, suitable for do-it-yourselfers and experienced mechanics)
Diagrams And Illustrations:
Richly illustrated with hundreds of photos, drawings, and diagrams, including detailed exploded views of components and comprehensive electrical wiring diagrams.
Engine Families:
IH DT-466 and IH D-360 Diesel Engines (specific to each model variation)
Engine Model Examples:
IH DT-466 (6-cylinder turbocharged diesel for higher horsepower models like 986, 1086) and IH D-360 (6-cylinder naturally aspirated diesel for models like 786, 886).
Power And Torque:
Detailed specifications for horsepower and torque will be found within the manual's 'Engine' and 'Specifications' sections, specific to each tractor model and engine configuration.
Fuel System Components:
Fuel injection pump, injectors, fuel filters, fuel lines, lift pump, fuel tank. Procedures for testing, calibration, and replacement will be detailed.
Cooling System Components:
Radiator, water pump, thermostat, coolant hoses, fan, coolant. Manual covers flushing, pressure testing, and component replacement.
Transmission Type:
Likely a synchronized constant mesh gearbox with multiple forward and reverse gears (e.g., 8-speed, 16-speed powershift options may exist, detailed in manual).
Powershift Options:
Some models in this series may have offered a powershift transmission (e.g., IH 4000, 4010, 4020 series). Manual will detail these options and their servicing.
Gearbox Features:
Details on gear selection, clutch engagement, and power take-off (PTO) engagement mechanisms. Lubrication requirements and service intervals.
Overall Dimensions:
Specific dimensions (length, width, height) for each model (786, 886, 986, 1086) are proprietary to IH specifications and would be detailed in the 'Specifications' section of the manual. These tractors are typically medium-frame agricultural tractors.
Operating Weight:
Unladen and operating weights for each specific model variant would be provided in the manual. These are substantial agricultural machines.
Safety Standards:
The manual will adhere to safety standards relevant to agricultural machinery during its production era. Specific crash ratings are not applicable to this type of equipment but safety precautions for operation and maintenance are paramount.
Operational Safety:
Includes procedures for brake system maintenance, steering system checks, PTO engagement safety, and hydraulic system safety warnings.
Structural Safety:
Information related to the integrity of the tractor's frame, fenders, and platform, with maintenance points to ensure structural soundness.
Features:
Basic instrumentation typical of tractors from its era, including gauges for oil pressure, water temperature, fuel level, and tachometer. No advanced infotainment systems.
Assistance Features:
Power steering is a key feature. Advanced driver assistance systems are not present on these models.
Connectivity Features:
No electronic connectivity features. Focused purely on mechanical and hydraulic operation.
Scheduled Maintenance:
The manual will provide detailed recommended service intervals for engine oil and filter changes, transmission oil, hydraulic oil, fuel filter replacement, air filter cleaning/replacement, and lubrication points.
Engine Oil Type:
Typically API CD or CE rated diesel engine oil, with viscosity grades like 15W-40 or 30W depending on ambient temperature. Specifics in manual.
Hydraulic Fluid Type:
IH Hy-Tran fluid or equivalent (universal tractor transmission fluid - UTTO). Manual will specify capacity and change intervals.
Transmission Fluid Type:
Specifications for transmission oil (e.g., SAE 90 gear oil for some components, or Hy-Tran for shared systems) will be detailed. Capacity and change intervals provided.
Coolant Type:
A mix of ethylene glycol-based antifreeze and water, typically a 50/50 solution for freeze protection and corrosion inhibition. Manual will specify correct type and capacity.
Common Wear Points:
While the manual focuses on proper repair, common wear points in these tractors often include clutch wear, hydraulic pump performance degradation, PTO clutch adjustments, and potential fuel system issues (injection pump, injectors) due to wear and tear.
Electrical System Concerns:
Older wiring harnesses can degrade, leading to intermittent electrical faults. The manual's detailed wiring diagrams are crucial for diagnosing these.
Manufacturer:
International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for its robust and reliable machinery.
Series Development:
The 786, 886, 986, and 1086 models represent a generation of IH tractors that evolved from earlier designs, incorporating improved features and more powerful engines to meet the demands of modern farming during their production period.
Production Era:
These models were primarily produced in the late 1970s and early 1980s. Exact production years for each specific model are detailed within the manual's introduction or specification sections.
