This manual covers the International Harvester Series Hydro 100, Hydro 186, 1466, 1468, 1486, 1566, 1568, and 1586 tractors, primarily produced in the 1970s and early 1980s. These tractors, powered by robust International Harvester diesel engines such as the DT-466 and DT-436, are known for their durability and productivity in agricultural applications. They feature hydrostatic transmissions offering variable speed and direction control, alongside comprehensive hydraulic systems for implements and steering. International Harvester's legacy is built on reliable machinery, and these models exemplify that tradition, designed to be powerful and dependable workhorses.
This workshop service repair manual provides complete, A-Z coverage for all models, engines, trims, and transmission types. It details engine overhaul, fuel, lubrication, cooling, starting, and exhaust systems, as well as hydrostatic transmission service, hydraulic systems, electrical wiring diagrams, chassis, drivetrain, and operator station components. Included are step-by-step maintenance and repair procedures, diagnostic guides with troubleshooting trees, torque specifications, and information on common wear items and electrical issues. This manual is designed to assist farm owners, mechanics, and DIY enthusiasts in maintaining and repairing their International Harvester tractors, enabling cost-effective upkeep and ensuring operational longevity.
Make:
International Harvester
Product Name:
International Harvester Series Hydro 100 Hydro 186 1466 1468 1486 1566 1568 1586 Tractor Complete Workshop Service Repair Manual PDF Download
Models Covered:
• Hydro 100
• Hydro 186
• 1466
• 1468
• 1486
• 1566
• 1568
• 1586
Target Audience:
Farm owners, mechanics, and DIY enthusiasts looking to maintain and repair International Harvester tractors.
Cost Saving Benefit:
Enables users to perform repairs themselves, saving significant money on labor costs.
Accessibility:
Downloadable and accessible on various digital devices.
Customer Assurance:
Customer Satisfaction Guaranteed
Coverage Scope:
Complete Service & Repair Procedures A-Z
Model Variants Covered:
All Models, Engines, Trim, and Transmission Types
Engine Variants Covered:
Includes specific details for different engine options (e.g., DT-466, DT-436, etc.) as fitted to the covered tractor models.
Transmission Variants Covered:
Details specific to the hydrostatic transmission systems used across the listed tractor models.
Manual Type:
Workshop Service Repair Manual
Delivery Method:
Instant Email Delivery
Computer Compatibility:
All PC & MAC Computers, Tablets, Mobile Phones
Required Software:
Adobe Reader (Free Download)
Engine Systems:
• Engine Overhaul
• Fuel System
• Lubrication System
• Cooling System
• Starting System
• Ignition System (if applicable)
• Intake and Exhaust Systems
Transmission Systems:
• Hydrostatic Transmission Service and Repair
• Hydraulic Pump and Motor Overhaul
• Transmission Fluid System
• Transmission Control Systems
Hydraulic Systems:
• Main Hydraulic System
• Power Steering System
• Implement Hydraulic Control
• Hydraulic Pumps, Valves, Cylinders, and Hoses
Electrical Systems:
• Wiring Diagrams
• Charging System
• Starting System
• Lighting System
• Instrument Panel and Gauges
• Component Testing and Diagnosis
Chassis And Drivetrain:
• Front Axle
• Rear Axle
• Braking System
• Steering System
• Clutch System (if applicable)
Operator Station:
• Operator Controls
• Seat and Safety Restraints
• Cab Components (if applicable)
Body And Frame:
• Sheet Metal Repair
• Frame Inspection and Repair
• Fenders and Hood Components
Power Take Off:
PTO system operation, maintenance, and repair.
Hitches And Linkages:
Three-point hitch system, draft control, and implement mounting.
Instrumentation And Controls:
Detailed explanations of all gauges, warning lights, and control functionalities.
Maintenance Procedures:
• Regular Inspections
• Lubrication Points and Schedules
• Filter Replacements
• Fluid Checks and Changes
• General Tune-Up Procedures
Repair Procedures:
• Component Removal and Installation
• Disassembly and Assembly
• Adjustment Procedures
• Troubleshooting Guides
• Torque Specifications
• Trouble Codes and Diagnostics
Diagnostic Procedures:
• Step-by-Step Diagnostic Trees
• Troubleshooting Common Problems
• Fault Code Interpretation
• Testing Electrical Components
Troubleshooting Methodology:
Systematic approach to diagnosing and resolving operational issues with detailed guidance.
Depth Of Information:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds.
Instructional Style:
Easy to follow step-by-step instructions with pictures.
File Type:
Portable Document Format (PDF)
Searchability:
Typically searchable PDF, allowing quick access to specific information.
Printable:
Yes (individual pages, chapters, or entire manual)
Binding Type:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Engine Family:
IH DT-466 and other International Harvester diesel engines used in these models. Specific engine variants depend on the exact model (e.g., DT-466A, DT-436).
Horsepower Range:
Typically ranging from approximately 70 HP to over 120 HP, depending on the specific model and engine variant.
Torque Specifications:
Refer to specific model sections within the manual for precise torque figures for engine components.
Injection System:
Typical for the era: Rotary or Inline Injection Pumps (e.g., Bosch, CAV, or Stanadyne) and direct injection.
Engine Oil Type:
Typically API CD or CE rated diesel engine oil, with viscosity grade depending on ambient temperature (e.g., 15W-40).
Coolant Type:
Ethylene glycol-based antifreeze with corrosion inhibitors, typically a 50/50 mix with water.
Displacement:
Commonly 436 cubic inches (7.15L) for the DT-436 and 466 cubic inches (7.63L) for the DT-466, though variations exist.
Engine Configuration:
Inline 6-cylinder, turbocharged diesel engines.
Transmission Type:
Hydrostatic Transmission (HST)
Hst Operation:
Infinitely variable speed and direction control via a hydrostatic drive system.
Transmission Fluid Type:
Specialized hydraulic fluid for hydrostatic transmissions (e.g., IH Hy-Trans, or equivalent specified by manual).
Operating Weight:
Varies significantly by model, generally in the range of 7,000 to 12,000 lbs (3,175 to 5,443 kg) without ballast.
Wheelbase:
Refer to specific model data within the manual; typical for this class of tractor.
Operator Presence Control:
Likely includes safety interlocks to prevent operation when the operator is not seated.
Rollover Protection:
ROPS (Roll-Over Protective Structure) may be standard or optional depending on the specific model and year of manufacture.
Seat Belts:
Seat belts are typically present with ROPS-equipped tractors.
Infotainment System:
N/A (Tractors of this era did not feature modern infotainment systems. Focus is on functional controls.)
Driver Assistance Features:
N/A (Primarily mechanical and hydraulic systems. Focus is on operator control.)
Connectivity Options:
N/A (No electronic connectivity features.)
Control Interface:
Mechanical levers and pedals for throttle, transmission speed/direction, hydraulics, and PTO.
Engine Oil Change Interval:
Typically every 250-500 operating hours, depending on operating conditions and oil type. Refer to manual for specifics.
Fuel Filter Replacement Interval:
Recommended at every oil change or more frequently if fuel quality is poor.
Hydraulic Fluid Change Interval:
Typically every 500-1000 operating hours, with filter changes at more frequent intervals.
Hydraulic Fluid Specification:
Crucial to use the correct IH Hy-Trans or equivalent fluid for the hydrostatic transmission and hydraulic system to prevent damage.
Brake Fluid Type:
Typically hydraulic fluid for the brake system, often shared with the main hydraulic system fluid.
Common Wear Items:
• Hydrostatic transmission charge pump wear
• Hydraulic system leaks (hoses, seals)
• Fuel injection pump seals
• Engine oil leaks (crankshaft seals, valve cover gaskets)
• Brake component wear
• Wear on clutch packs (if applicable to certain transmissions/PTOs)
Electrical Issues:
Corrosion on electrical connectors, aging wiring harnesses, and generator/alternator issues are common in older equipment.
Brand Legacy:
International Harvester (IH) was a prominent American manufacturer of agricultural machinery, construction equipment, and vehicles, known for its durable and reliable products.
Series Context:
These tractors represent a significant period for IH, incorporating the hydrostatic drive system for enhanced maneuverability and ease of operation, particularly in demanding agricultural applications. The 06 and 86 series were popular models in their time.
Production Period:
The models listed (Hydro 100, Hydro 186, 1466, 1468, 1486, 1566, 1568, 1586) were primarily produced in the 1970s and early 1980s.
Industry Standing:
International Harvester tractors of this period were highly regarded for their robust construction and productivity, making them workhorses on many farms.
