The International Harvester 1086 is a robust agricultural tractor, produced between 1976 and 1981, renowned for its powerful DT-466 diesel engine and the versatile T-144 Power Transfer transmission offering 16 forward gears. This model, a significant part of the successful Hydro 70/86 series, was manufactured primarily in Rockford, Illinois, and is recognized for its strong engineering and reliable performance in heavy draft work. Its design prioritized operator efficiency and durability, making it a staple in the agricultural industry and earning it industry recognition for setting benchmarks in its era.
This comprehensive workshop service repair manual provides in-depth coverage for the International Harvester 1086. It details general information, specifications, and step-by-step repair procedures for all major systems, including the engine, cooling system, fuel system, powertrain, clutch, differential lock, electrical system, brakes, and hydraulic system. With hundreds of photos and illustrations, this manual is an essential resource for do-it-yourself owners and experienced mechanics alike, offering troubleshooting guidance, particularly for electrical systems, and ensuring optimal maintenance and repair for the tractor.
Make:
International Harvester
Product Type:
Workshop Service Repair Manual
Product Identifier:
IH International Harvester 1086 Workshop Service Manual PDF Download
Target Audience:
Do-it-yourselfers and experienced mechanics for IH International Harvester 1086 tractor owners
Value Proposition:
Cost-effective way to maintain and repair the tractor, saving money and improving knowledge
Comprehensiveness:
Complete official full factory service repair manual
Instructional Aid:
Hundreds of photos and illustrations guiding through procedures
Usability:
Numbered instructions, bold figure numbers, detailed substeps, notes, cautions, and warnings
Navigability:
Numbered table of contents for quick information retrieval
General Information:
Provided
Differential Lock:
Provided
Electrical System:
Provided
Fenders Fuel Tank Platform:
Provided
Front Wheel Drive:
Provided
Hydraulic System:
Provided
Main Drive Bevel Gears Differential:
Provided
Power Steering System:
Provided
Estimate:
Hundreds of pages
Type:
Official Full Factory Service Repair Manual
Repair Procedures:
Step-by-step, based on complete disassembly
Troubleshooting:
Included, particularly for electrical systems
Maintenance:
Implied by service repair context
Depth:
Complete factory level detail, suitable for do-it-yourselfers and experienced mechanics
Diagnostic Capabilities:
Enhanced for electrical systems with detailed wiring diagrams
Compatibility:
All PC-based Windows operating systems and Mac
Printability:
Printable without any restriction, entirety or select pages
Binding:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Delivery:
Download link on checkout page after payment
Reader Requirement:
Adobe PDF Reader
Engine Type:
Internal Combustion (Diesel)
Engine Model:
DT-466 (Commonly fitted to 1086, manual will detail specific configurations)
Displacement:
466 cubic inches (7.6 Liters)
Horsepower Rating:
Approximately 130-140 PTO HP (Varies by specific configuration and tuning)
Torque Rating:
Significant torque output for heavy draft work (Specifics detailed in manual)
Injection System:
Direct Injection (Typically Bosch inline injection pump)
Transmission Type:
T-144 Power Transfer (16-speed forward, 4-speed reverse)
Optional Transmission:
N/A (T-144 was standard for 1086)
Gear Selection:
Splitter gearbox and range shifter for 16 forward gears
Transmission Fluid Type:
IH Hy-Trans (or equivalent UTF - Universal Tractor Fluid, specific specifications in manual)
Wheelbase:
Approx. 94 inches (2388 mm)
Overall Length:
Approx. 155 inches (3937 mm)
Operating Weight:
Approx. 10,000 lbs (4536 kg) without ballast
Maximum Ballast:
Significant capacity for ballast, detailed in manual
Rollover Protection:
ROPS (Roll Over Protective Structure) likely available or standard, manual will cover installation/maintenance
Braking System:
Hydraulically assisted disc brakes (wet disc brakes)
Seatbelt:
Likely present with ROPS installation
Infotainment System:
N/A (Agricultural tractor of its era)
Driver Assistance Features:
N/A (Focus on core mechanical and hydraulic operation)
Connectivity Features:
N/A (Mechanical and basic electrical systems)
Engine Oil Change:
Typically every 250 hours or annually (Refer to manual for precise IH recommendations)
Hydraulic Fluid Change:
Typically every 1000-1200 hours or annually (Refer to manual)
Engine Oil Grade:
API CD/CE rated diesel engine oil, SAE 15W-40 recommended (Check manual for specific IH specs)
Coolant Type:
Ethylene glycol-based antifreeze, 50/50 mix with clean water
Transmission Hydraulic Fluid:
IH Hy-Trans or equivalent UTF
Common Wear Points:
Clutch packs, hydraulic pump, front axle kingpins, and PTO components are common wear areas over time. Electrical connectors can be prone to corrosion.
Diagnostic Focus:
Manual's detailed troubleshooting for electrical and hydraulic systems is critical for addressing common operational quirks.
Manufacturer History:
International Harvester was a major American manufacturer of agricultural and construction equipment.
Model Lineage:
The 1086 is part of the highly successful International Harvester Hydro 70/86 series, known for its power and reliability.
Production Years:
1976-1981
Manufacturing Plant:
Rockford, Illinois, USA (Primary)
Industry Recognition:
The 1086, as part of the Hydro 86 series, was renowned for its robust engineering and operator comfort for its time, setting benchmarks in the agricultural industry.
