Target Audience:
Owners, technicians, and enthusiasts of International Harvester 986 and 1086 tractors
Value Proposition:
Provides factory-level repair and maintenance information, enabling significant savings on labor costs ($50-$60 per hour).
Content Authenticity:
Genuine factory repair data, mirroring information used by professional technicians.
Usability:
Easy to navigate with a numbered table of contents, search function, and printable pages.
Completeness:
Covers fundamentals to advanced troubleshooting and complete rebuilds for all styles.
Engine Service:
Full coverage including disassembly, servicing, and diagnostics
Lubrication System:
Detailed maintenance and repair procedures
Cooling System:
Service procedures for cooling system components
Fuel System:
Comprehensive fuel system servicing and troubleshooting
Clutch System:
Disassembly, inspection, and repair of the clutch
Transmission System:
Service for transmission components and operation
Drivetrain And Axles:
Coverage for drive chains, sprockets, rear axle, and front axle
Braking System:
Repair and maintenance for brake systems
Steering System:
Service and adjustment for steering mechanisms
Hydraulic System:
Detailed procedures for hydraulic system maintenance and repair
Electrical System:
Troubleshooting, service procedures, and wiring diagrams
Bodywork And Chassis:
Includes body work, shocks, intake, and exhaust systems
Routine Maintenance:
Guidance on regular servicing tasks
Disassembly And Servicing:
Step-by-step procedures for component removal and service
Advanced Troubleshooting:
Diagnosing and resolving complex issues
Rebuild And Restoration:
Comprehensive guidance for complete overhauls
Tuning And Adjustment:
Procedures for optimizing performance
Diagnostic Capability:
Advanced diagnostic procedures for identifying faults
Repair Detail Level:
In-depth, step-by-step instructions with critical notes and warnings
Illustrations And Diagrams:
Includes numerous detailed illustrations, drawings, photos, and wiring diagrams
Factory Information Authenticity:
Actual genuine factory service manuals, not 3rd party
Compatibility:
Compatible with all PC based Windows OS and Mac
Printability:
Fully printable, no restrictions, print individual pages or entire manual
Resolution:
High resolution
Binding Style:
N/A (Digital Download, printable)
Paper Format:
N/A (Digital Download, printable)
Required Reader:
Adobe PDF Reader
Delivery Type:
Instant download link on checkout page after payment
Engine Family:
D-Series (Diesel)
Engine 986 Common:
International Harvester D-360 (360 cubic inch, 6-cylinder Diesel)
Engine 1086 Common:
International Harvester DT-414 (414 cubic inch, 6-cylinder Diesel Turbocharged)
Horsepower 986 Approx:
93 PTO HP (May vary with specific configurations)
Horsepower 1086 Approx:
116 PTO HP (May vary with specific configurations)
Injection System:
Rotary injection pump (e.g., Bosch or CAV/Stanadyne) and injectors (coverage detailed in manual)
Transmission Type 986:
10-speed PowerShift (fully synchronized)
Transmission Type 1086:
10-speed PowerShift (fully synchronized)
Transmission Options:
While PowerShift was standard for these models, the manual would cover any variations or alternative configurations if applicable from the factory.
Powershift Operation:
Provides on-the-go gear changes without clutching, enhancing productivity.
Wheelbase 986 Approx:
99 inches (2515 mm)
Wheelbase 1086 Approx:
99 inches (2515 mm)
Operating Weight 986 Approx:
8,600 lbs (3,900 kg) (Varies with configuration)
Operating Weight 1086 Approx:
9,500 lbs (4,300 kg) (Varies with configuration)
Roll Over Protection:
ROPS (Roll-Over Protective Structure) was often an option or factory-installed on these models. Manual covers relevant components and maintenance.
Brake System Type:
Internal expanding shoe brakes (typically, manual will detail specifics)
Operator Station:
Design considerations for operator comfort and safety are inherent in the factory documentation.
Operator Interface:
Basic analog gauges and controls typical of agricultural machinery from the 1970s/early 1980s.
Traction Control:
No electronic traction control systems; relies on mechanical four-wheel drive (if equipped) and operator skill.
Diagnostic Ports:
Onboard diagnostics would primarily be mechanical checks and visual inspections, supplemented by the manual's troubleshooting guides.
Engine Oil Change:
Typically every 250 operating hours (refer to manual for precise intervals based on operating conditions and oil type)
Transmission Hydraulic Fluid Change:
Typically every 1,000 operating hours (refer to manual for exact capacity and filter change recommendations)
Engine Oil Specification:
API CD or MIL-L-2104C/D service category diesel engine oil, viscosity SAE 15W-40 or 10W-30 depending on ambient temperature (refer to manual for precise recommendations).
Hydraulic Fluid Specification:
IH Hy-Tran (or equivalent meeting specification B-6)
Common Wear Points:
Clutch wear, hydraulic pump reliability, PowerShift transmission seals and clutches, and front axle kingpins are common wear items addressed by the manual.
Electrical Gremlins:
As with many tractors of this era, minor electrical issues can arise; the manual's wiring diagrams and troubleshooting are crucial.
Manufacturer Legacy:
International Harvester (IH) was a major American manufacturer of agricultural and construction machinery, known for its durable and powerful equipment.
86 Series Introduction:
The 86 series tractors, including the 986 and 1086, were introduced in the mid-1970s as a replacement for the successful 06 and 56 series, offering more comfort, power, and advanced features like the PowerShift transmission.
Production Years:
Approximately 1976-1981 (Specific years for 986 and 1086 vary within this range)
Manufacturing Plant:
Primary manufacturing locations included the IH Farmall Works in Rock Island, Illinois.
Brand Reputation:
International Harvester tractors were known for their robustness and workhorse capabilities, earning a strong reputation among farmers.
Industry Standing:
The 86 series was a highly regarded line of tractors, competitive with offerings from John Deere, Case, and Ford during its production run.
Manual Quality:
Certified as 'Actual Genuine Repair Service Factory Manuals', indicating high accuracy and completeness.
