Positioning:
Essential technical reference for maintaining and repairing the International Harvester 1086 tractor.
Advantage:
Provides professional-level repair information accessible to experienced DIY users, reducing labor costs.
Key Selling Points:
Instant download, comprehensive coverage, detailed diagrams, troubleshooting guides, professional authoring.
Engine:
Complete overhaul, diagnosis, timing, cooling system, lubrication system, fuel system, starting and charging systems.
Transmission:
Removal, installation, disassembly, assembly, repair of powershift transmission, clutch, gearbox, differentials, and drive shafts.
Hydraulics:
Hydraulic pump, cylinders, control valves, power steering system, remote hydraulic outlets, PTO hydraulics, troubleshooting.
Electrical System:
Wiring diagrams, starter motor, alternator, battery system, lighting, instrumentation, diagnostic procedures.
Chassis And Frame:
Front axle, rear axle, steering system, braking system, hitch system, drawbar.
Body And Sheet Metal:
Hood, fenders, operator station, mounting and alignment of panels.
Power Take Off (Pto):
PTO engagement, gears, clutch, drive lines, troubleshooting.
Maintenance:
Periodic maintenance charts, lubrication, filter changes, fluid checks, battery maintenance.
Repair:
Step-by-step repair instructions for all major components and systems.
Troubleshooting:
Systematic troubleshooting guides for common and uncommon problems.
Overhaul:
Detailed overhaul procedures for engines, transmissions, hydraulic pumps, and other major assemblies.
Diagnostics:
Diagnostic routines and specifications for various systems.
Depth:
Comprehensive (from basic maintenance to complete rebuilds)
Target Audience:
Professional technicians and experienced DIY mechanics
Engine Model:
DT-402 (Diesel)
Engine Type:
4-stroke, turbocharged diesel
Displacement:
402 cubic inches (6.6 L)
Horsepower:
Approx. 116 PTO HP (rated)
Torque:
Approx. 314 lb-ft @ 1400 RPM (rated)
Fuel System Type:
Bosch inline injection pump (typically)
Cooling Medium:
Water/Antifreeze mixture
Oil Capacity:
10 quarts (9.5 liters) with filter (refer to manual for precise capacity)
Recommended Oil Viscosity:
API CD Service, SAE 15W-40 (check manual for specific ambient temperature recommendations)
Transmission Type:
14-speed PowerShift (T-12)
Optional Transmission:
Not applicable for this model as PowerShift was standard.
Powershift Operation:
Electro-hydraulic control for on-the-go shifting through 14 forward and 6 reverse gears.
Transmission Fluid:
Hy-Trans Fluid (or equivalent UTF, check manual for specific IH specification)
Transmission Fluid Capacity:
Approx. 16 quarts (15.2 liters) for powershift transmission (check manual for precise capacity).
Length:
Approx. 157.5 inches (400 cm) (without implement)
Wheelbase:
Approx. 97.3 inches (247 cm)
Operating Weight:
Approx. 9,600 lbs (4,354 kg)
Rear Axle Capacity:
Heavy-duty planetary final drives
Front Tire Size:
10.00-16 (typical, varies by configuration)
Rear Tire Size:
18.4R38 (typical, varies by configuration)
Rollover Protection:
ROPS (Roll-Over Protective Structure) available/optional depending on configuration and year, manual covers installation and maintenance.
Braking System:
Hydraulically assisted, self-adjusting, inboard wet disc brakes.
Operator Station:
Designed for operator comfort and visibility, with access to controls for safe operation.
Infotainment System:
Basic, analog instrumentation; radio often an aftermarket addition.
Driver Assistance Features:
Power steering, hydrostatic power steering (on some models), tachometer, fuel gauge, temperature gauge, oil pressure warning light.
Connectivity:
Not applicable in the modern sense; focuses on mechanical and basic electrical systems.
Engine Oil And Filter:
Every 250 hours (typical, refer to manual for exact intervals based on operating conditions).
Transmission Fluid And Filter:
Every 1000 hours (typical, refer to manual for exact intervals).
Hydraulic Fluid And Filter:
Every 1000 hours (typical, refer to manual for exact intervals).
Engine Coolant:
50/50 mix of permanent type antifreeze and water (check manual for IH specification).
Hydraulic Fluid Specification:
IH Hy-Trans fluid or equivalent UTF (Universal Tractor Transmission Fluid), meeting IH B-6 specification.
Common Wear Points:
Powershift transmission clutches, hydraulic pump wear, front axle pivot pins, PTO clutch wear.
Potential Problems:
Turbocharger issues, injector pump calibration, sealing problems in hydraulics, electrical connector corrosion.
Manufacturer Heritage:
International Harvester (IH) was a prominent American manufacturer of agricultural and construction equipment, known for its robust and reliable machinery.
Series Placement:
The 1086 was part of the highly successful 86-series, a significant upgrade in power, comfort, and technology over previous IH models.
Production Years:
Produced from 1976 to 1981.
Manufacturing Location:
Rockford, Illinois, USA (primarily)
