Target Audience:
Professional Technicians, Do-It-Yourself Mechanics, Owners performing maintenance and repairs
Advantage Of Digital:
No shipping cost, no waiting, printable sections for dirty environments
Purpose:
To provide comprehensive information for routine maintenance, repairs, troubleshooting, and overhauls of the International Harvester Tractor 786.
Accuracy Source:
Written by manufacturers, original workshop manual standards
Market Context:
Competed with similar horsepower tractors from manufacturers like John Deere, Ford, and Massey Ferguson during its production era.
Primary Coverage:
International Harvester Tractor 786
Additional Coverage:
Repair, service, maintenance, wiring diagrams, diagnostics, troubleshooting.
Estimated Pages:
Hundreds of Pages (typical for factory workshop manuals)
Type:
Workshop Service Repair Manual / Service Manual / Repair Manual / Factory Service Manual
Engine:
Engine Overhaul, Troubleshooting, Maintenance, Repair
Transmission:
Transmission Repair, Maintenance, Overhaul Procedures
Electrical System:
Wiring Diagrams, Electrical System Troubleshooting, Component Diagnosis
Hydraulic System:
Hydraulic System Service, Repair, Maintenance
Fuel System:
Fuel System Diagnosis and Repair
Cooling System:
Cooling System Maintenance and Repair
Braking System:
Brake System Service and Repair
Chassis And Suspension:
Chassis and Suspension Service
Bodywork:
Body Panel Repair and Maintenance
Power Take Off:
PTO system service, repair, and adjustment.
Steering System:
Power steering system diagnosis and repair.
Drivetrain:
Differential, final drives, and PTO drive components.
Maintenance:
Periodic Maintenance Charts, Routine Service Procedures
Repair:
Step-by-step Repair Instructions for all Major Systems
Troubleshooting:
Diagnostic Procedures, Common Issue Resolution
Overhaul:
Complete Overhaul Procedures for Engine and Major Components
Diagnostics:
Detailed Diagnostic Information and Flowcharts
Calibration:
Calibration procedures for fuel injection system and other key components.
Timing Settings:
Engine timing and injection pump timing procedures.
Troubleshooting Methodology:
Provides systematic approaches to diagnose and resolve common mechanical and electrical problems.
Depth:
Professional Level, Suitable for Technicians and Advanced DIY Mechanics
Diagrams And Illustrations:
Hundreds of pages of diagrams and detailed information, including schematics and exploded views.
Parts Information:
Likely includes detailed part diagrams and identification, although a separate parts catalog may be more comprehensive.
Completeness:
Comprehensive, covering all aspects of repair and maintenance as expected from a factory service manual.
Engine Model:
Likely a D-series or DT-series diesel engine (e.g., DT-466) based on IH tractor lineage of that era.
Engine Displacement:
Likely a 4-cylinder or 6-cylinder diesel engine, with common displacements around 300-400 cubic inches (e.g., 414 cu in, 466 cu in).
Typical Horsepower Range:
Approximately 80-100 PTO horsepower (specific output depends on engine variant and configuration).
Torque Characteristics:
Designed for strong low-end torque essential for heavy draft work.
Injection System:
Likely Bosch inline injection pump (e.g., Bosch P3000 series) or distributor-type injection pump for diesel fuel.
Turbocharging:
Models may be naturally aspirated or turbocharged. Turbocharged models would have a DT designation (e.g., DT-466).
Transmission Type:
Likely a 16-speed PowerShift (Power Transfer Compaction) or a 8-speed synchromesh with a 4-speed gearbox, offering a total of 16 forward speeds and 4 reverse speeds. (e.g., IH 16-speed PowerShift).
Gear Selection:
Multiple gear ratios for optimized power delivery across various field conditions and transport.
Transmission Variations:
While a PowerShift was common, other gearbox configurations might have been available depending on specific market or options.
Operating Weight:
Typically in the range of 9,000 to 11,000 lbs (4,000 to 5,000 kg), depending on configuration and options.
Front Axle Load:
Adequate to support the engine and front-end loader if equipped, with manual specifying limits.
Engine Oil Change:
Typically every 250 hours of operation, or annually, whichever comes first (refer to manual for precise interval).
Fuel Filter Replacement:
Recommended replacement at specified intervals, often with every oil change or as per manual guidance.
Hydraulic Oil Change:
Typically every 1000 hours, with filter changes at more frequent intervals.
Engine Oil Type:
API CD or higher rated diesel engine oil, viscosity typically 15W-40 or 10W-30 depending on ambient temperature. (Consult manual for exact specification).
Hydraulic Fluid Type:
IH Hy-Trans or equivalent universal tractor transmission fluid (UTTF) meeting specific IH specifications. (Consult manual for exact specification).
Coolant Type:
Ethylene glycol based antifreeze with corrosion inhibitors, mixed with distilled water in a 50/50 ratio. (Consult manual for exact specification).
Transmission Fluid Type:
Specific IH Hy-Trans or an equivalent that meets IH's specifications for wet brakes and hydraulics. (Consult manual for exact specification).
Final Drive Fluid Type:
Likely the same as the hydraulic/transmission fluid (UTTF) or a specific gear oil. (Consult manual for exact specification).
Engine Oil Capacity:
Typically around 12-15 quarts (11-14 liters) for 6-cylinder engines. (Consult manual for exact capacity).
Common Wear Points:
Potential wear in transmission clutch packs, hydraulic pump components, and PTO engagement depending on usage and maintenance history.
Electrical System Quirks:
Older electrical systems can sometimes develop issues with wiring connections, switches, and voltage regulators.
Engine Specific Issues:
Depending on the specific engine variant, potential issues could include injector pump calibration, turbocharger wear (if equipped), and glow plug reliability.
Manufacturer Legacy:
International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for robust and reliable machinery.
Series Context:
The 786 is part of IH's 86 series of tractors, which were a significant evolution in the company's tractor line, known for improved comfort and performance.
Predecessors Successors:
Part of IH's transition from older tractor designs to more modern and comfortable machines, preceding the Case IH merger.
Production Period:
Produced primarily in the late 1970s and early 1980s.
