Positioning:
Essential diagnostic and repair resource for owners and technicians of International Harvester 786, 886, 986, and 1086 tractors.
Competitors:
Provides factory-level detail often superior to aftermarket manuals, ensuring accuracy for specialized IH components.
Convenience:
Instant download access, searchable text for quick information retrieval, ability to print specific sections as needed.
Cost Savings:
Empowers users to perform their own maintenance and repairs, significantly reducing labor costs.
Knowledge Base:
Provides in-depth understanding of tractor systems, crucial for efficient operation and emergency repairs.
Primary Coverage:
International Harvester 786, 886, 986, 1086 Tractors
Additional Coverage:
Troubleshooting guides, maintenance schedules, parts information (often referenced), and technical specifications.
Estimated Pages:
Varies by specific factory manual, typically 500-1500+ pages for comprehensive coverage.
Type:
Factory Service and Repair Manual
Type Detail:
Factory Service Repair Manual; also referred to as Shop Manual or Workshop Manual.
Engine:
Engine overhaul, fuel system, lubrication, cooling system, starting and charging systems, troubleshooting.
Transmission:
Manual transmission, power shift transmission (if applicable), differential, final drives, PTO (Power Take-Off).
Hydraulic System:
Hydraulic pump, control valves, cylinders, system pressure checks, troubleshooting, fluid specifications.
Electrical System:
Wiring diagrams, lighting, starter motor, alternator, battery, ignition system (if applicable), instrument panel.
Chassis And Drive:
Front axle, rear axle, steering system, brakes (mechanical and hydraulic), clutch, wheel and tire specifications.
Operator Station:
Cab components, controls, seating, instrumentation, heating and air conditioning (if equipped).
Body And Frame:
Sheet metal, fenders, drawbar, hitch, maintenance of structural components.
Maintenance:
Scheduled maintenance, lubrication points, fluid change intervals, filter replacement.
Troubleshooting:
Diagnostic charts, common problems and their solutions, systematic fault finding.
Repair:
Step-by-step disassembly, inspection, repair, and reassembly procedures for all major components.
Diagnostics:
Procedures for checking engine performance, hydraulic pressures, electrical circuits, and drivetrain operation.
Adjustments:
Brake adjustments, clutch adjustments, linkage adjustments, hydraulic valve adjustments.
Specifications:
Torque specifications, clearances, fluid capacities, pressure settings, electrical resistance values.
Wiring Diagrams:
Includes comprehensive wiring diagrams for electrical systems, aiding in troubleshooting and repair of lighting, starting, and charging circuits.
Torque Specs:
Detailed torque specifications for critical fasteners throughout the tractor, ensuring proper assembly and preventing component failure.
Depth:
Comprehensive, covering from routine maintenance to major component overhaul and repair. Suitable for both professional mechanics and skilled owners.
Component Rebuild:
Procedures for complete disassembly, inspection, and rebuilding of major engine, transmission, and hydraulic components.
Engine Family:
International Harvester DT-402 / DT-466 Diesel (Commonly found in these models, though variations may exist).
Displacement:
DT-402: 402 cubic inches (6.6 Liters); DT-466: 466 cubic inches (7.6 Liters)
Bore X Stroke:
DT-402: 4.31 in x 4.75 in; DT-466: 4.59 in x 4.75 in (approximate values, consult manual for exact figures).
Engine Type:
Vertical, water-cooled, four-stroke diesel engine.
Horsepower Range:
Model dependent, typically ranging from 70 HP (786) to over 120 HP (1086) in various configurations.
Torque Range:
Significant torque output suitable for heavy draft work, specific values vary by engine and tuning.
Injection System:
Bosch inline injection pump or distributor type, depending on exact model and year.
Fuel Filter Part Numbers:
Various aftermarket equivalents available; manual will specify IH part numbers.
Transmission Type:
Various configurations including 8-speed synchromesh, 16-speed PowerShift (full-clutch transmission), and 10-speed fully synchronized transmissions.
Optional Transmission:
Optional PowerShift transmissions offered on many models for on-the-go gear changes.
Clutch:
Dual-stage clutch for independent PTO and transmission operation on some models.
Pto:
Live PTO or ground-speed PTO options available.
Rear Axle:
Heavy-duty rear axle with differential lock.
Gear Selection:
Manual shifting with synchronized gears or PowerShift planetary gear sets depending on transmission option.
Wheelbase:
Varies by model, typically around 90-100 inches.
Length:
Varies by model, often around 140-160 inches.
Operating Weight:
Typically in the 7,000 - 10,000 lbs range, depending on configuration and options.
Drawbar Horsepower:
Approximate: 786 (65-70 HP), 886 (80 HP), 986 (90 HP), 1086 (100-105 HP).
Engine Oil Change:
Typically every 250 hours of operation or annually, whichever comes first.
Fuel Filter Replacement:
Recommended every 250-500 hours, or if fuel system issues arise.
Hydraulic Fluid Change:
Generally every 1000-1200 hours or two years.
Engine Oil:
API CD or CE rated, SAE 15W-40 diesel engine oil is commonly recommended. Consult manual for specific IH specs.
Hydraulic Fluid:
IH Hy-Tran UTTO (Universal Tractor Transmission Oil) or equivalent meeting IH specifications is critical for transmission, hydraulics, and wet brakes.
Coolant:
Ethylene glycol based coolant with corrosion inhibitors, typically a 50/50 mix with distilled water.
Transmission Fluid:
IH Hy-Tran UTTO or equivalent.
Common Problems:
Wear on clutch components, potential hydraulic pump or seal leaks, electrical connection corrosion, starter motor issues, PTO engagement problems (depending on usage).
Preventative Maintenance:
Regularly check and replace filters, maintain proper fluid levels and types, inspect for hydraulic leaks, keep electrical connections clean and tight.
