This workshop service repair manual covers the International Harvester 1066 tractor, produced approximately between 1971 and 1976. The 1066 is renowned for its robust design and powerful International Harvester D-series diesel engine, typically delivering between 70-100 PTO horsepower with strong low-end torque essential for demanding agricultural tasks. This model, part of the successful '966' series, evolved from earlier IH designs and was manufactured primarily in Rock Island, Illinois. Known for its reliability and significant contribution to farm productivity during its era, the 1066 featured International Harvester's own transmissions, often with multiple forward and reverse gears and the option of a 'Power Shift' for on-the-go gear changes. Safety features include provisions for ROPS, seat belts, and hydraulically operated wet-disc brakes.
This comprehensive English-language manual provides detailed information for maintaining and repairing the International Harvester 1066. It covers all major systems, including engine mechanical and electrical components, fuel, emission control, suspension, clutch, manual and automatic transaxles, driveshaft and axle, steering, brake system, body interior/exterior, body electrical, and restraint systems. The manual offers step-by-step instructions for maintenance, repair, diagnostics, and overhaul, complete with detailed illustrations, diagrams, wiring schematics, specifications, and warnings. It is designed to be a valuable resource for both do-it-yourself owners and experienced mechanics seeking to keep their tractor in optimal working condition.
Make:
International Harvester
Product Type:
Workshop Service Repair Manual
Value Proposition:
Inexpensive way to keep your vehicle working properly.
Advantage:
Number one source for repair and service information, written for a broad audience.
Content Highlights:
Detailed illustrations, diagrams, wiring schematics, specifications, step-by-step instructions, notes, cautions, and warnings.
Target Users:
Do-it-yourselfers and experienced mechanics.
Primary Coverage:
International Harvester Tractor 1066
Estimated Page Count:
Significant (typical for comprehensive workshop manuals, exact number not provided but implied by detailed coverage)
Type:
Workshop Service Repair Manual / Factory Service Repair Manual
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating Systems:
All Versions of Windows & Mac
Automatic Transaxle:
Yes (if applicable to 1066 variant)
Body Interior Exterior:
Yes
Restraint System:
Yes (likely referring to seat belts and operator safety features)
Maintenance:
Yes (detailed substeps, numbered instructions)
Troubleshooting:
Yes (integrated with electrical service)
Repair:
Yes (step-by-step instructions for every detail)
Diagnostics:
Yes (electrical system diagnosis)
Overhaul:
Implied by comprehensive nature covering all details
Depth:
Complete Service Manual (Do-it-yourselfer to experienced mechanic)
Printability:
Fully Printable
Binding:
N/A (Digital Download)
Paper Quality:
N/A (Digital Download)
Engine Family:
International Harvester D-series diesel (typically D-239, D-268, or D-282 depending on specific 1066 variant and year).
Horsepower Range:
Approx. 70-100 PTO HP (Power Take-Off horsepower, actual engine HP may vary slightly).
Torque Characteristics:
Designed for strong low-end torque essential for heavy agricultural work.
Injection System:
Typically rotary or inline injection pump (e.g., CAV, Bosch, or Simms).
Transmission Type:
International Harvester's own transmissions, often referred to as "Power Transfer
Transmission Options:
Available with various gear configurations including 2WD and 4WD (Dוהt-Wheel Drive) variants, and potentially powershift options on some later models or specific configurations.
Gear Selection:
Multiple forward and reverse gears (e.g., 8-speed forward, 2-speed reverse).
Powershift Availability:
Some 1066 models were equipped with a 'Power Shift' option, offering on-the-go gear changes within certain ranges.
Wheelbase:
Varies by 2WD/4WD configuration, typically around 94-96 inches for 2WD.
Operating Weight:
Approximately 7,000-8,500 lbs (3,175-3,855 kg) depending on configuration and options.
Safety Features:
Focus on operator safety including ROPS (Roll-Over Protective Structure) provisions, seat belts, and robust braking systems. Specific crash ratings are not applicable to this class of equipment.
Braking System:
Hydraulically operated, wet-disc brakes are a common feature, providing excellent stopping power and durability.
Operator Station:
Designed with operator comfort and safety in mind, though modern ergonomic standards may differ.
Features:
N/A (Agricultural tractor; focus on operational functionality, not infotainment).
Features:
N/A (Limited to mechanical controls and power steering).
Engine Oil Change:
Typically every 200-250 operating hours (refer to manual for specific interval).
Transmission Fluid Change:
Refer to manual; often linked to hydraulic fluid service, typically 500-1000 hours.
Engine Oil Type:
API CD or CE rated diesel engine oil (e.g., SAE 30 or 15W-40 depending on ambient temperature).
Hydraulic Transmission Fluid:
IH HyTran or equivalent (check manual for precise specification, often a universal tractor fluid - UTF).
Common Wear Items:
Clutch wear, hydraulic pump issues, injector pump calibration, PTO clutch packs, and seal leaks are common on well-used units.
Electrical System Concerns:
Older wiring harnesses can degrade; attention to charging system and starter motor is important.
Manufacturer:
International Harvester (IH) was a major American manufacturer of agricultural machinery and trucks.
Series Placement:
The 1066 was part of the highly successful '966' series of tractors, which evolved from earlier IH models and were known for their reliability and power.
Production Years:
Approximately 1971-1976.
Manufacturing Location:
Primarily Rock Island, Illinois, USA.
Industry Impact:
The 1066 is considered a legendary tractor in the agricultural industry, known for its robust design and power, contributing significantly to the productivity of farms during its era.
