The International Harvester (IH) Cadet series, encompassing models 55, 75, 85, 85 Special, and 95, represents a line of robust utility tractors designed for agricultural and property maintenance tasks. Produced likely from the late 1960s through the mid-1970s, these tractors are powered by reliable IH C-Series engines, available in various displacements and fuel types, delivering substantial power for their class. Known for their sturdy construction, versatile transmission options, and effective three-point hitch systems, IH Cadets were built to be dependable workhorses. Their engineering prioritizes durability and operational efficiency, making them a strong choice for demanding applications.
This comprehensive factory service repair manual provides detailed information essential for maintaining and repairing your International Harvester Cadet tractor. It covers a wide array of systems, including in-depth engine overhaul procedures, transmission and drivetrain service, electrical system diagnostics, and chassis and steering component repair. The manual also details routine maintenance schedules, lubrication requirements, and troubleshooting guides to address common issues. With step-by-step instructions, technical specifications, and wiring diagrams, this manual serves as an indispensable resource for owners, mechanics, and technicians seeking to ensure the longevity and optimal performance of their IH Cadet tractor.
Make:
International Harvester (IH)
Model:
Cadet 55, 75, 85, 95, 85 Special
Likely Engine Codes:
Varies by specific model and year, but commonly IH 132, 148, 152, 177, 196 cubic inch gasoline engines; also diesel variants for some models
Original Market Segment:
Utility tractors for small to medium-sized farms, property maintenance, and light industrial applications
Key Competitors:
John Deere (e.g., 1020, 2020 series), Ford (e.g., 3000, 4000 series), Massey Ferguson (e.g., 135, 148 series), Allis-Chalmers (e.g., D15, D17 series)
Core Strengths:
Robust IH engines known for reliability, versatile gearbox options, sturdy construction, good PTO capabilities, often equipped with IH's reliable 3-point hitch and draft control system.
Primary Coverage:
Factory Service Repair
Estimated Page Count:
Likely 500+ pages (typical for comprehensive factory service manuals of this era)
Manual Type:
Factory Service Repair Manual
Format:
Likely printed (original factory manual), potentially available as PDF reprint
Engine Systems:
Engine overhaul, cylinder head service, piston and connecting rod service, crankshaft and bearing service, camshaft and valve train service, lubrication system, cooling system, fuel system (carburetor and injection), ignition system, exhaust system
Transmission Systems:
Manual transmission overhaul and repair, clutch service, PTO (Power Take-Off) operation and service, differential service, final drive service
Electrical Systems:
Wiring diagrams, starter system, charging system (alternator/generator), lighting system, instrument panel, battery service
Chassis And Steering:
Front axle and steering system overhaul, rear axle housing service, braking system (mechanical and hydraulic), hydraulic lift system (if applicable), power steering system (if applicable)
Body And Frame:
Frame inspection and repair, fender and hood service, operator platform/seat service
Maintenance Procedures:
Routine maintenance, lubrication points, filter replacement intervals, fluid level checks, tune-up procedures
Repair Procedures:
Step-by-step disassembly and reassembly instructions for all major components and systems
Troubleshooting Guides:
Diagnostic charts and symptom-based troubleshooting for common issues
Depth Of Coverage:
Comprehensive from basic maintenance to complete engine and transmission rebuilds; includes detailed specifications and tolerances
Digital File Type:
PDF (if digital reprint), TIFF/JPEG (scanned images if only partial)
Print Quality Description:
High-resolution scans or clear original print, ensuring legibility of diagrams and text
Binding Type:
Staple-bound, perfect bound, or spiral bound (for reprints)
Paper Type:
Durable paper stock suitable for workshop environments
Engine Family:
IH C-Series (e.g., C-135, C-148, C-152, C-177, C-196 gas and diesel variants)
Horsepower Range:
Approximately 25-45 PTO horsepower, depending on specific model and engine displacement
Torque Characteristics:
Designed for strong pulling power at lower RPMs, typical for diesel engines
Carburetor Types:
Marvel-Schebler, Zenith (for gasoline engines)
Injection System Types:
Roosamaster, CAV (for diesel engines)
Gearbox Types:
Constant mesh, sliding gear transmissions (e.g., 6-speed, 8-speed, 10-speed, 12-speed options)
Additional Drivetrain Options:
Some models offered Torque Amplifier (TA) for on-the-go shifting of range, Hi-Lo transmissions
Pto Speeds:
Standard 540 RPM PTO, some models may have 1000 RPM PTO option
Wheelbase Range:
Approximately 70-80 inches, varies by model
Overall Length Range:
Approximately 110-130 inches, varies by model
Operating Weight Range:
Approximately 3000-4500 lbs, varies by configuration (e.g., presence of loader, specific engine)
Historical Safety Context:
Tractors of this era generally lacked modern ROPS (Roll-Over Protective Structures) and seatbelts as standard. Manual will detail safe operating practices for its time.
Braking System Type:
Typically mechanical disc or drum brakes, some may feature hydraulically assisted brakes
Operator Station Design:
Open operator station, safety considerations revolve around clutch disengagement, PTO engagement, and hydraulic system operation.
Infotainment Features:
None (basic operator controls, mechanical gauges)
Driver Assistance Features:
None (mechanical linkages, basic steering)
Connectivity Options:
N/A
Engine Oil Change Interval:
Typically every 50-100 operating hours, depending on engine type and operating conditions
Transmission Oil Change Interval:
Every 250-500 operating hours
Grease Points:
Daily or weekly lubrication of steering components, PTO shaft, lift arms, and front axle pivots
Engine Oil Recommendation:
SAE 30 or 10W-30 API CD/SE rated oils, depending on ambient temperature. Manual will specify exact grade.
Transmission Hydraulic Fluid:
IH Hy-Trans fluid or equivalent UTF (Universal Tractor Transmission) fluid
Coolant Specification:
Ethylene glycol based antifreeze, typically a 50/50 mix with distilled water
Common Wear Items:
Clutch wear, PTO seal leaks, carburetor adjustments, steering box wear, hydraulic pump performance degradation
Potential Electrical Problems:
Corroded wiring connectors, worn generator/alternator brushes, starter motor issues
Ignition Timing:
Specific timing marks and degrees as per manual, critical for gasoline engine performance
Spark Plug Gap:
Typically .025 to .030 inches, manual will provide precise specification
Manufacturer Legacy:
International Harvester was a major American manufacturer of agricultural and construction machinery. The Cadet line represented their smaller utility tractors.
Cadet Line Development:
The Cadet line evolved through various iterations, with the 55, 75, 85, and 95 models representing distinct upgrades in engine size, transmission options, and hydraulic capabilities within the late 1960s and 1970s era.
Production Period:
Likely late 1960s to mid-1970s
Industry Standing:
IH tractors of this era were generally well-regarded for their durability and work ethic, contributing to IH's strong market share in agriculture.
Reliability Perception:
Known for robust build quality and reliable engines, though maintenance is key to longevity.
Manufacturing Standards:
Built to International Harvester's internal manufacturing standards of the era.
