Target Audience:
Owners, operators, and mechanics of IH International Harvester 986 and 1086 tractors.
Comprehensiveness:
Complete and intact, covering all models, engines, trim, and transmission types without missing or corrupt parts.
Professional Quality:
Same quality manual used in local service/repair shops, written by manufacturers.
Cost Savings:
Enables users to perform repairs and maintenance themselves, saving significant costs.
Accessibility:
Instant download provides immediate access to crucial repair information.
Usability:
Features step-by-step instructions, diagrams, pictures, and detailed explanations for ease of use.
Engine Service:
Detailed service, maintenance, and troubleshooting for all engine types.
Lubrication System:
Comprehensive coverage of the lubrication system.
Cooling System:
Detailed information on the cooling system.
Fuel System:
Service and maintenance for the fuel system.
Clutch Service:
Complete procedures for clutch disassembly and service.
Transmission Service:
In-depth repair and maintenance for the transmission.
Drive Chain Sprockets:
Service and maintenance for drive chains and sprockets.
Rear Axle Service:
Detailed axle repair and maintenance.
Brake System:
Complete brake service and repair procedures.
Front Axle Service:
Front axle service and repair information.
Steering System:
Service and troubleshooting for the steering system.
Shocks Suspension:
Information related to shock absorbers and suspension.
Body Work:
Procedures for body work and related components.
Intake Exhaust Systems:
Maintenance and repair for intake and exhaust systems.
Hydraulic System:
Comprehensive coverage of the hydraulic system.
Electrical System:
Service and troubleshooting for the electrical system, including wiring diagrams.
Routine Maintenance:
Detailed instructions for routine maintenance tasks.
Troubleshooting:
Advanced troubleshooting guides for common and complex issues.
Wiring Diagrams:
Includes original wiring diagrams.
Disassembly Servicing:
Step-by-step procedures for disassembly and servicing of major components.
General Repair:
General repair procedures applicable to the tractors.
Separation Procedures:
Detailed instructions for separating major tractor assemblies.
Component Rebuild:
Instructions for rebuilding key components.
Depth:
Professional-grade, comprehensive diagnostic, repair, and maintenance information.
User Level:
Suitable for professional technicians and experienced DIY users.
Engine Type:
Diesel (specifics depend on model/configuration, typically DT-466 or similar IH diesel engines)
Horsepower Range:
Refer to specific model variants within the manual (e.g., 986 typically in the 100-120 HP range, 1086 in the 120-140 HP range)
Torque Specifications:
Detailed torque specifications for engine components found within the manual.
Injection System:
Information on diesel injection pump and injector service covered.
Transmission Type:
Manual, synchronized transmission (e.g., IH 16-speed power shift or 10-speed constant mesh)
Optional Transmission:
Power Shift options available on some configurations (covered in manual).
Gear Ratios:
Detailed gear ratios and transmission assembly information are included.
Transmission Fluid Specifications:
Recommended transmission fluid types and capacities detailed.
Infotainment Features:
Tractors of this era typically have basic radio options; the manual covers the electrical systems relevant to these.
Driver Assistance Features:
Focus is on mechanical and electrical systems, not modern driver assistance features.
Connectivity Options:
No electronic connectivity features typically found on these models.
Engine Oil Change:
Specific intervals (e.g., every 100-250 hours) for engine oil and filter changes are detailed in the manual.
Hydraulic Fluid Change:
Recommended intervals for hydraulic fluid and filter replacement provided.
Engine Oil Type:
Manual specifies recommended diesel engine oil viscosity grades (e.g., SAE 15W-40) and API service classifications.
Hydraulic Fluid Type:
Specifications for hydraulic/transmission fluid (e.g., IH Hy-Trans or equivalent) will be listed.
Coolant Specifications:
Recommended coolant type and mixture ratios for the cooling system are included.
Common Wear Points:
The manual would detail common wear points and their troubleshooting, such as clutch wear, hydraulic pump issues, and transmission synchro wear.
Electrical Gremlins:
Troubleshooting common electrical issues like starter solenoid problems, lighting circuit faults, and gauge failures is covered.
Hydraulic System Performance:
Common hydraulic performance issues, such as slow or erratic lift, are addressed with diagnostic steps.
Brand History:
International Harvester (IH) was a major American manufacturer of agricultural and construction machinery, known for its robust and reliable equipment.
Model Series:
The 986 and 1086 were part of IH's highly successful '86 series tractors, introduced in the mid-1970s, representing advancements in comfort and performance.
Production Years:
The 86 series, including the 986 and 1086, were primarily produced from approximately 1976 to 1981.
