This workshop repair service manual covers the International Harvester 786 and 886 agricultural tractors, produced from the mid-1970s to the early 1980s. These robust machines, powered by diesel engines such as the IH 414 for the 786 and International Harvester DT-402 for the 886, were designed for demanding farm work. The 786 typically offered around 74 PTO horsepower, while the 886 provided approximately 83 PTO horsepower. Known for their durability and reliability, these tractors featured synchronized transmissions, with the 786 offering an 8-speed synchronized transmission and the 886 a 16-speed Synchro-Range, with Power Shift options available for both. Their strong legacy in the agricultural sector is a testament to International Harvester's commitment to quality engineering.
This comprehensive manual provides in-depth information essential for the maintenance, troubleshooting, and repair of your International Harvester 786 or 886 tractor. It details engine systems, including disassembly, lubrication, cooling, fuel, and exhaust, as well as drivetrain components such as the clutch, transmission, axles, and PTO. Coverage extends to chassis systems like brakes and steering, hydraulic systems, and the electrical system, complete with wiring diagrams. With step-by-step repair procedures, detailed illustrations, and advanced troubleshooting guides, this manual empowers farm owners, mechanics, and technicians to perform all necessary service tasks, ensuring the longevity and optimal performance of their equipment.
Make:
International Harvester
Equipment Type:
Agricultural Tractor
Target Audience:
Farm owners, mechanics, maintenance technicians, and hobbyists working on International Harvester 786 and 886 tractors.
Cost Savings:
Enables users to perform repairs and maintenance themselves, saving potentially thousands of dollars in labor costs.
Accuracy And Completeness:
Official manufacturer-written manual, identical to what professional service shops use, ensuring accuracy and completeness.
Accessibility:
Instant PDF download provides immediate access to crucial repair information.
Advantage Over Alternatives:
Provides a digital, searchable, and easily printable format, unlike older physical manuals, and is often more comprehensive than generic repair guides.
Covered Engines:
All Engine Types
Covered Transmissions:
All Transmission Types
Covered Trims:
All Trim Levels
Page Count Estimate:
Hundreds of pages (as stated in description)
Manual Type:
Workshop Repair Service Manual
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating Systems:
All Versions of Windows & Mac
Engine Systems:
Engine disassembly and servicing, Lubrication system, Cooling system, Fuel system, Intake & Exhaust
Drivetrain Systems:
Clutch, Transmission, Drive Chain & Sprockets, Rear Axle, Front Axle
Chassis Systems:
Brakes, Steering, Shocks
Hydraulic Systems:
Hydraulic System
Electrical Systems:
Electrical System, Wiring Diagrams
General Procedures:
General information, Disassembly and Servicing, Separation
Maintenance Procedures:
Routine Maintenance
Diagnostic Procedures:
Advanced Troubleshooting
Repair Procedures:
Step-by-step repair procedures, Detailed substeps, Disassembly, Assembly, Cleaning, Reinstalling procedures
Depth Of Information:
Comprehensive diagnostic, repair, and maintenance information as used by professional technicians.
Illustrations And Diagrams:
Hundreds of pages of diagrams, Detailed illustrations, drawings and photos, Enlarged inset helps you identify and examine parts in detail.
Troubleshooting Support:
Troubleshooting and electrical service procedures combined with detailed wiring diagrams.
PDF Quality:
High Quality, Zoom IN/OUT
Printability:
Full Printable
Binding Type:
N/A (Digital PDF)
Paper Type:
N/A (Digital PDF)
Engine Family:
International Harvester DT-402 (for 886), IH 414 (for 786) or similar variants.
Horsepower 786 Estimate:
Approx. 74 PTO HP (D310 engine)
Horsepower 886 Estimate:
Approx. 83 PTO HP (DT402 engine)
Injection System:
Indirect Injection (typical for these models)
Cooling Method:
Liquid-cooled
Transmission Type 786:
8-speed synchronized transmission (optional: Power Shift)
Transmission Type 886:
16-speed Synchro-Range transmission (optional: Power Shift)
Gear Selection:
Manual shift, synchronized gears for smooth engagement.
Power Take Off Pto:
540/1000 RPM PTO (configurable based on configuration)
Operating Weight 786 Estimate:
Approx. 7,800 - 9,000 lbs
Operating Weight 886 Estimate:
Approx. 8,500 - 10,000 lbs
Rollover Protection:
ROPS (Roll-Over Protective Structure) often standard or optional, depending on configuration and era.
Braking System:
Hydraulic disc brakes (usually dry or wet, depending on specific model variant and options).
Seatbelt:
Seatbelts often included with ROPS.
Audio System:
Basic analog instrumentation, no integrated infotainment systems in the modern sense.
Traction Control:
N/A (Tractors of this era do not feature electronic driver assistance systems).
Communication Systems:
N/A
Engine Oil Change Interval:
Typically 100-250 hours, depending on operating conditions (refer to manual for exact specification).
Hydraulic Fluid Change Interval:
Typically annually or after a specified number of operating hours.
Engine Oil Specification:
IH-specified API CD or CE grade diesel engine oil, SAE 15W-40 or 30 (refer to manual for exact ambient temperature range).
Hydraulic Fluid Specification:
IH Hy-Trans fluid or equivalent (refer to manual for specific viscosity and type).
Common Wear Points:
Clutch wear, hydraulic pump or cylinder leaks, transmission gear wear, front axle kingpin wear, electrical harness degradation over time.
Engine Related:
Glow plug reliability, injector pump calibration, turbocharger seal leaks (if equipped).
Brand Legacy:
International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for its robust and reliable machinery.
Series Context:
The 786 and 886 were part of IH's successful 86 series tractors, introduced in the mid-1970s as replacements for earlier models, offering improved comfort and features.
Production Period Estimate:
Mid-1970s to early 1980s
Industry Standing:
86 series tractors were highly regarded for their power, durability, and operator comfort, contributing to IH's strong market presence during their production.
