The International Harvester 1066 tractor, produced from approximately 1971 to 1976, represents a robust and reliable piece of agricultural machinery, building on International Harvester's esteemed legacy. This model, part of the successful 06 and 56 series, succeeded earlier designs and preceded the '86' series, offering significant power and functionality for its era. Featuring a direct injection, turbocharged diesel engine from the DT-400 series, commonly the DT-402, DT-436, or DT-466, and available with either a Full Synchro Transmission (FST) offering 8 forward and 4 reverse speeds or an optional 3-speed Power Shift, the 1066 was engineered for demanding tasks. Its substantial operating weight and robust construction underscore its intended use in heavy-duty agricultural and industrial applications, making it a workhorse known for its durability and performance.
This comprehensive Workshop Service Repair Manual provides detailed guidance for the maintenance and repair of the International Harvester 1066 tractor. Covering a wide array of systems, including the engine, transmission, hydraulics, electrical, and PTO, it offers step-by-step repair instructions, overhaul procedures, and troubleshooting diagnostics. The manual is designed for professional technicians and experienced DIY mechanics, equipping them with the original manufacturer's accurate and complete information necessary to keep the tractor in optimal working condition. With hundreds of pages of content, it includes essential routine maintenance schedules, wiring diagrams, and technical specifications, ensuring owners and technicians can effectively service and repair this iconic piece of equipment.
Make:
International Harvester
Product Type:
Workshop Service Repair Manual
Product Title:
International Harvester Tractor 1066 Workshop Service Repair Manual
Target Audience:
Professional technicians and experienced DIY mechanics.
Value Proposition:
Enables owners to perform maintenance and repairs themselves, saving on labor costs.
Content Source:
Written by manufacturers (International Harvester).
Accuracy Completeness:
Original workshop manual provides the most accurate and complete information.
Accessibility:
Instant download provides immediate access without shipping delays.
Usability:
Easy-to-follow instructions, printable sections for workshop use.
Coverage Scope:
Comprehensive service and repair for the International Harvester 1066 tractor.
Estimated Page Count:
Hundreds of pages (specific count not provided in product info, but stated as 'hundreds').
Manual Classification:
Workshop Manual, Service Manual, Repair Manual, Factory Service Manual
Delivery Method:
Instant Download
Engine Service:
Detailed overhaul, repair, and maintenance procedures for the engine.
Transmission Service:
Covers repair and maintenance of the transmission system.
Electrical System:
Includes wiring diagrams and troubleshooting for the electrical system.
Hydraulic System:
Procedures for hydraulic system maintenance and repair (inferred as essential for tractors of this era).
Powertrain:
Covers driveline components, differential, and final drives.
Chassis And Frame:
Information on frame, steering, and suspension components.
Cooling System:
Details on radiator, fan, and thermostat service.
Fuel System:
Service and repair of the fuel delivery and injection system.
Braking System:
Information on brake maintenance and repair.
Power Take-Off Pto:
Service procedures for PTO operation and repair.
Operator Station:
Details on cab components and controls.
Routine Maintenance:
Periodic maintenance charts and schedules.
Step By Step Repairs:
Detailed, sequential repair instructions for various components.
Troubleshooting:
Diagnostic information and common issue resolution.
Overhaul Procedures:
Comprehensive instructions for complete component overhauls, including engines.
Wiring Diagrams:
Inclusion of detailed wiring schematics for electrical system diagnostics.
Diagnostics:
Technical information for diagnosing faults and performance issues.
Depth Level:
Professional-grade, suitable for dealership service departments and experienced mechanics, with adequate detail for DIY users.
Primary Manual Type:
Workshop Service Repair Manual
Secondary Manual Type:
Factory Service Manual
Tertiary Manual Type:
Repair Manual
Printability:
Full Printable
Binding:
Digital (PDF Download - no physical binding)
Paper Quality:
N/A (Digital format)
PDF Reader:
Adobe PDF Reader
Decompression Software:
WinRAR
Operating Systems:
Compatible with All Versions of Windows & Mac
Engine Family:
International Harvester DT-402, DT-436, DT-466 Diesel (Specific engine variant depends on tractor configuration, but 400-series engines are common).
Typical Horsepower Range:
Approx. 70-110 PTO horsepower, depending on specific engine variant and tuning.
Engine Type:
Direct Injection, Turbocharged Diesel (common for higher HP models).
Injection System:
Bosch or similar mechanical injection pump systems.
Engine Oil Type:
API CD or CE rated heavy-duty diesel engine oil (e.g., 15W-40, 30W depending on temperature and OEM recommendation).
Engine Oil Capacity:
Typically 12 quarts (11.4 liters) for DT-402/436 engines, 16 quarts (15.1 liters) for DT-466 (check manual for exact spec).
Transmission Type:
Full Synchro Transmission (FST) - 8 forward speeds and 4 reverse speeds.
Optional Transmission:
Power Shift (3-speed planetary gear type) available on some models.
Gear Selection:
Shift-on-the-go capability with FST, power-shifted gears with Power Shift.
Transmission Fluid Type:
API GL-4 or GL-5 rated gear oil for FST; IH Hytran or equivalent for Power Shift and hydraulic system.
Wheelbase:
Approximately 92.25 inches (2343 mm).
Operating Weight:
Approx. 10,000 - 12,000 lbs (4536 - 5443 kg) depending on configuration.
Infotainment Features:
N/A (This is a tractor from the 1970s; focus is on mechanical and hydraulic functionality).
Assistance Features:
N/A (Tractor technology focuses on operator control of agricultural implements).
Connectivity Options:
N/A
Engine Oil Change Interval:
Typically 250-300 hours or annually (refer to manual for precise interval).
Transmission Fluid Change Interval:
Every 500-1000 hours (refer to manual for exact specification).
Air Filter Maintenance:
Check and clean or replace based on operating conditions (visual inspection or indicator).
Coolant Type:
Ethylene glycol-based antifreeze (e.g., 50/50 mix with distilled water).
Common Wear Points:
Clutch wear, PTO engagement issues, hydraulic pump wear, front axle bearing wear, injector pump seals.
Electrical Gremlins:
Wiring harness degradation or loose connections leading to intermittent electrical issues.
Transmission Specific:
Wear in FST synchronizers, potential clutch pack issues in Power Shift models.
Manufacturer Legacy:
Part of International Harvester's long-standing reputation for robust agricultural and industrial equipment.
Series Introduction:
The 1066 was part of the successful 06 and 56 series, succeeding models like the 966 and preceding the 1086 with the new '86' series.
Production Years:
Produced from approximately 1971 to 1976.
