Target Audience:
Tractor owners, mechanics, farm equipment repair shops.
Cost Savings:
Enables users to perform their own repairs, saving significant costs compared to professional service.
Ease Of Use:
Easy-to-follow, step-by-step instructions.
Comprehensiveness:
Covers all services, repairs, and routine maintenance.
Covered Models:
International Harvester 766, 826, 966, 1026, 1066 Tractors
Estimated Page Count:
Varies by specific model, but typically extensive (e.g., 500+ pages for comprehensive manuals)
Manual Type:
Workshop Service Manual (WSM) / Repair Manual
Download Type:
Instant Download
Reader Requirement:
Adobe PDF Reader
Compatibility:
All Versions of Windows & Mac
Engine:
Engine overhaul, tuning, fuel system, lubrication, cooling system, starting and charging systems, engine diagnostics.
Transmission:
Transmission overhaul, clutch, gear shifting mechanisms, torque amplifier, power take-off (PTO) operation and repair.
Hydraulics:
Hydraulic system operation, pump service, valve assembly, cylinder repair, hitch control, hydraulic fluid specifications.
Electrical:
Wiring diagrams, lighting systems, starter motor, alternator, battery service, ignition system troubleshooting, instrument panel.
Chassis And Frame:
Frame inspection and repair, front axle, rear axle, steering system, braking system.
Body And Cab:
Cab structure, operator controls, seat, fenders, sheet metal repair, painting guidance.
Routine Maintenance:
Lubrication charts, filter replacement intervals, fluid level checks, greasing points.
Diagnostics And Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Major Repairs:
Complete disassembly, inspection, repair, and reassembly of all major tractor components.
Component Rebuild:
Detailed instructions for rebuilding engines, transmissions, hydraulic pumps, and other critical assemblies.
Technical Specifications:
Torque specifications, clearances, timing procedures, hydraulic pressures, electrical resistance values.
Depth:
In-depth, professional quality, covering all areas of repair and maintenance.
Illustrations:
Pictures and diagrams included for clarity.
Wiring Diagrams:
Comprehensive wiring diagrams provided for electrical system troubleshooting and repair.
Engine Families:
Models likely feature International Harvester's D-series and DT-series diesel engines (e.g., D-236, DT-236, D-268, DT-268, D-310, DT-310, DT-358, DT-407 depending on model and specific variant).
Displacement Range:
Approximately 236 to 407 cubic inches (3.8 to 6.7 liters) across the model range.
Horsepower Range:
Engine horsepower typically ranged from around 65 HP for the 766 to over 100 HP for the 1066 models.
Torque Specifications:
Specific torque figures are detailed within the manual for engine components and assembly.
Injection System:
Typically rotary or inline injection pumps (e.g., CAV, Bosch) for diesel engines.
Transmission Types:
Manual transmission, often with a synchronized gearbox. Torque Amplifier (TA) option was common.
Powershift Transmission:
Some higher horsepower models may have had optional powershift transmissions available.
Torque Amplifier:
The Torque Amplifier provided a low-range gear reduction without clutching, effectively doubling the number of gears.
Overall Length:
Varies by model and configuration (e.g., 2WD vs. 4WD, loader attachments).
Wheelbase:
Specifications vary by model, but are provided in the manual.
Operating Weight:
Typically ranges from 8,000 to 12,000+ lbs depending on the model and options.
Engine Oil Change:
Typically every 100-250 operating hours, depending on operating conditions and oil type.
Hydraulic Fluid Change:
Usually recommended at 500-1000 operating hours or annually.
Engine Oil:
API CD or CE rated diesel engine oil, SAE 30 or 10W-30 depending on temperature.
Hydraulic Fluid:
IH Hy-Tran fluid or equivalent UTF (Universal Tractor Transmission fluid) meeting specific IH specifications (e.g., T-22).
Transmission Fluid:
IH Hy-Tran fluid or equivalent UTF.
Coolant:
Ethylene glycol based antifreeze mixture, typically a 50/50 blend with distilled water.
Torque Amplifier Failure:
Can be prone to wear and failure if not operated correctly or if maintenance is neglected.
Hydraulic System Leaks:
Aging seals and hoses can lead to hydraulic fluid leaks.
Engine Component Wear:
Standard wear on pistons, rings, bearings, and valve train after extensive use.
Manufacturer:
International Harvester (IH), a significant American manufacturer of agricultural machinery and vehicles.
Series Context:
These tractors represent the late 1960s and early 1970s era of IH's tractor production, succeeding earlier models and preceding the later Case IH tractors.
Production Period:
Likely produced from the late 1960s through the 1970s.