Target User:
Owners, mechanics, and service technicians working on the International Harvester 766 Tractor.
Value Proposition:
Provides comprehensive, factory-authorized information to reduce repair costs and downtime, ensuring proper maintenance and longevity of the tractor.
Information Layout:
Organized with a table of contents for easy information retrieval and navigation.
Accessibility:
Downloadable and accessible on various devices for anytime, anywhere repairs.
Engine:
Detailed diagnostics, overhaul procedures, fuel system, cooling system, lubrication system.
Transmission:
Repair and overhaul of the transmission, clutch, PTO, and final drives.
Hydraulic System:
Service and repair of the hydraulic pump, control valves, cylinders, and associated components.
Electrical System:
Wiring diagrams, troubleshooting, starter, alternator, battery service, lighting systems.
Chassis And Steering:
Front axle, rear axle, steering system overhaul, brakes.
Operator Station:
Dashboard, controls, seat, rollover protective structures (if applicable).
Steering System:
Power steering system (if equipped), steering linkage, and components.
Brakes:
Rear brake system service, adjustment, and component replacement.
Maintenance:
Scheduled maintenance, lubrication points, filter changes, fluid level checks.
Troubleshooting:
Diagnostic guides for common and uncommon problems, fault finding.
Repair:
Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation.
Overhaul:
Complete overhaul procedures for major components like engines, transmissions, and hydraulic systems.
Adjustments:
Precise adjustment procedures for clutches, brakes, engine timing, and hydraulic controls.
Diagnostics:
Troubleshooting charts for engine performance issues, hydraulic leaks, transmission shifting problems, and electrical faults.
Diagnostic Capability:
Advanced diagnostic procedures, including detailed troubleshooting flowcharts and specifications.
Rebuild Capability:
Full rebuild instructions for all major mechanical and hydraulic systems.
Specification Detail:
Torque specifications, clearances, tolerances, fluid capacities, and pressure settings.
Wiring Diagrams:
Detailed wiring diagrams for all electrical circuits, including lighting, starter, charging, and instrument panel.
Compatibility:
Requires Adobe PDF Reader.
Software Requirements:
Adobe PDF Reader, WinZip (for potential archive extraction).
Searchability:
PDF format typically allows for text searching, facilitating quick information lookup.
Resolution:
Typically high-resolution scans, suitable for printing detailed diagrams and text.
Diagram Clarity:
High-quality scans ensure clarity of exploded views, schematics, and diagnostic charts for accurate repairs.
Digital Format:
Downloadable PDF file, no physical binding.
Digital Storage:
Stored electronically, accessible on various devices.
Engine Options:
Available with International Harvester's D-series diesel engines (e.g., D-239, D-282, D-312) depending on the specific configuration or year. Gas engine options may also exist.
Horsepower Range:
Typically in the 70-90 PTO horsepower range, exact figures vary by engine and transmission.
Fuel Type:
Diesel (primary) or Gasoline (secondary).
Injection System:
Roosa Master or CAV rotary injection pumps common for diesel variants.
Gearbox Type:
Synchronized transmission (e.g., 8-speed forward and 4-reverse, or 16-speed powershift) depending on specific model variant.
Powershift Option:
Optional Power-Shift transmission (e.g., IH 4-speed Powershift) was available for enhanced operational flexibility.
Pto:
Independent Power Take-Off (PTO) is a standard feature, typically with 540/1000 RPM capability.
Differential Lock:
Mechanical rear differential lock for enhanced traction.
Wheelbase:
Approximately 88 inches (2235 mm) for standard 2WD models.
Overall Length:
Varies, but typically around 140-150 inches (3556-3810 mm).
Operating Weight:
Approximately 6,000 - 7,500 lbs (2721 - 3402 kg) depending on configuration and ballast.
Front Axle Weight:
Approximately 2,000 - 2,500 lbs (907 - 1134 kg).
Rear Axle Weight:
Approximately 4,000 - 5,000 lbs (1814 - 2268 kg).
Engine Oil Change:
Typically every 100-150 hours of operation, depending on operating conditions and oil type.
Air Filter Cleaning:
Service as needed, or every 50-100 hours, depending on dust levels. Dry element replacement per manual.
Fuel Filter Replacement:
Typically every 200-300 hours, or as recommended by the manual.
Engine Oil:
API CD or CE rated diesel engine oil, SAE 15W-40 or 30W depending on ambient temperature. Capacity approx. 8-10 quarts (7.6-9.5 L) with filter.
Transmission Hydraulic Fluid:
IH Hy-Trans or equivalent UTF (Universal Tractor Transmission Fluid). Capacity approx. 15-20 gallons (57-76 L).
Coolant:
Ethylene glycol based coolant with corrosion inhibitors, typically a 50/50 mix with water. Capacity approx. 18-20 quarts (17-19 L).
Common Wear Points:
Wear in the clutch, synchronizers in the transmission, hydraulic pump and seals, and potential for front axle kingpin wear.
Diesel Specific Issues:
Glow plug reliability, injector pump calibration, and potential for hard starting in cold weather due to older diesel technology.
