🏷️ Basic Information

Make:

International Harvester

Model:

Harvester Cadet 75

Product Type:

Service and Repair Manual

👋 Introduction

Positioning:

Essential resource for owners and mechanics seeking to maintain and repair the International Harvester Cadet 75 tractor, emphasizing DIY repair quality.

Analogy:

This manual serves as the definitive guide, akin to a factory-authorized service manual, providing detailed instructions that factory-trained technicians would use.

Feature 1:

Covers all major service and repair aspects of the IH Cadet 75.

Feature 2:

Facilitates high-quality, in-house repairs and maintenance.

Feature 3:

Provides detailed technical specifications and troubleshooting guidance.

Feature 4:

Includes crucial diagrams and schematics (e.g., wiring, hydraulic).

📋 Manual Details

Engine:

Yes

Transmission:

Yes

Hydraulics:

Yes

Electrical System:

Yes

Chassis:

Yes

Bodywork:

Yes

Maintenance:

Yes

Troubleshooting:

Yes

Specifications:

Yes

Estimated Pages:

Hundreds (typical for comprehensive tractor service manuals)

Type:

Service and Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Systems:

Disassembly, inspection, assembly, lubrication, cooling system, fuel system, ignition system (if applicable to engine type), exhaust system.

Transmission Systems:

Gearbox disassembly, shifting mechanisms, lubrication, clutch operation and adjustment (if applicable).

Hydraulic Systems:

Hydraulic pump, control valves, cylinders, fluid reservoir, hydraulic circuit diagrams, troubleshooting hydraulic issues.

Electrical Systems:

Wiring diagrams, battery, starter, generator/alternator, lighting, ignition switch, safety switches.

Steering System:

Steering linkage, tie rods, steering gearbox or pump (if applicable), adjustments.

Braking System:

Brake pedal, brake linkages, drum brake or disc brake components (depending on configuration), hydraulic lines, bleeding procedures.

Power Takeoff Pto:

PTO engagement, drive shafts, clutch operation (if integrated), maintenance.

Front Axle Steering:

Front wheel bearings, kingpins, spindles, steering components.

Rear Axle Differential:

Differential housing, gears, axle shafts, lubrication.

Maintenance Procedures:

Scheduled lubrication, filter changes, fluid level checks, belt adjustments, battery maintenance, tune-up procedures.

Repair Procedures:

Step-by-step instructions for component disassembly, repair, reassembly, and testing for all major systems.

Troubleshooting Guides:

Diagnostic flowcharts and symptom-based troubleshooting for common problems across all systems.

Technical Adjustments:

Carburetor adjustment, ignition timing (if applicable), clutch free play, brake adjustment, hydraulic control adjustments.

Component Replacement:

Detailed guidance on replacing parts such as water pumps, fuel pumps, electrical components, hydraulic seals.

Engine Overhaul:

Yes, detailed steps for complete engine rebuild.

Hydraulic Component Repair:

Yes, covers pump, cylinder, and valve overhaul and seal replacement.

Depth:

Comprehensive (covers overhaul, rebuilding, and in-depth diagnostics)

Diagnostic Level:

Advanced (includes electrical schematics and troubleshooting for complex issues)

Rebuild Procedures:

Complete engine, transmission, and hydraulic system rebuild instructions with tolerances and specifications.

📊 Manual Specifications

Format:

PDF

Searchability:

Likely text-searchable if professionally scanned and indexed.

File Type:

Digital PDF Document

Quality:

Varies by source, but generally good clarity for technical diagrams and text.

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Completeness:

Comprehensive service and repair coverage for all major systems.

⚙️ Engine Specifications

Engine Model:

Likely a variant of the International Harvester C-series gasoline engine (e.g., C-113, C-123, or similar displacement depending on exact model year).

Engine Type:

Inline 3 or 4-cylinder, naturally aspirated, gasoline-powered.

Bore Stroke:

Specifics vary by engine variant, but typical for this era (e.g., ~3.125" bore x ~3.5" stroke for C-113).

Horsepower Rating:

Estimated 20-30 PTO horsepower, depending on exact engine displacement and tuning.

Torque Rating:

Typical for smaller displacement tractor engines of the period.

Carburetor:

Single barrel carburetor, likely from Marvel-Schebler or Zenith.

Fuel Type:

Gasoline

Oil Capacity:

Typically around 4-5 quarts with filter.

Type:

Water-cooled, pressurized system with radiator and fan.

Cylinder Count:

Typically 3-cylinder or 4-cylinder.

🔧 Transmission

Transmission Type:

Sliding gear, constant mesh, manual transmission.

Gear Speeds:

Likely 3 forward gears and 1 reverse gear (3F-1R) or potentially more depending on specific Cadet 75 variant.

Optional Features:

Some models may have offered a creeper gear or a high-low range selector for increased versatility.

Clutch Type:

Single plate, dry friction type, operated by foot pedal.

Transmission Fluid Type:

SAE 90 Gear Oil (API GL-4 recommended).

Transmission Fluid Capacity:

Approximately 4-6 quarts.

📐 Dimensions

Wheelbase:

Approximately 65-70 inches (varies slightly by configuration).

Length:

Approximately 90-100 inches.

Width:

Approximately 50-60 inches (track width adjustable).

Operating Weight:

Approximately 1800-2200 lbs.

Drawbar Horsepower:

This is a performance metric, not a dimension, but relevant to capability.

🛡️ Safety Features

Safety Standards:

Tractors of this era were built to basic mechanical safety standards; ROPS (Roll Over Protection Structure) and seatbelts were not standard equipment and may not be covered extensively unless retrofitted.

Parking Brake:

Mechanical parking brake system.

Headlights:

Standard on most models for road use.

Operator Presence Control:

Typically implemented via clutch pedal interlock or PTO engagement interlock.

💡 Technology Features

Infotainment System:

None (basic tractor instrumentation: ammeter, oil pressure, temperature, tachometer).

Driver Assistance Features:

None (basic mechanical controls).

Connectivity Features:

None (mechanical connections only).

🔧 Maintenance

Engine Oil Change:

Every 50 operating hours or annually.

Oil Filter Change:

With every engine oil change.

Air Cleaner Service:

Check and clean daily or as needed based on operating conditions (e.g., dusty environments).

Fuel Filter Replacement:

As per manual recommendations, typically annually or at specific hour intervals.

Transmission Oil Change:

Every 250-500 operating hours or every 2 years.

Greasing:

Regularly lubricate all grease points (e.g., kingpins, linkages, PTO shaft) as per manual's specified intervals.

Engine Oil Type:

API SF/CD rated, SAE 30 or SAE 10W-30 depending on climate (refer to specific manual section).

Coolant Type:

Ethylene Glycol based antifreeze with corrosion inhibitors, 50/50 mix with distilled water.

Hydraulic Fluid Type:

IH Hy-Tran or equivalent universal tractor transmission fluid (UTTF) meeting IH specifications.

Common Issue 1:

Carburetor wear and adjustment difficulties, leading to hard starting or rough running.

Common Issue 2:

Hydraulic system leaks or slow operation due to worn seals or pump wear.

Common Issue 3:

Electrical system issues (corrosion, loose connections) affecting starting or lighting.

Common Issue 4:

Wear in the transmission or PTO engagement mechanisms.

Common Issue 5:

Fuel sediment bowl and filter clogging, requiring frequent cleaning.

📚 Vehicle History

Heritage Summary:

International Harvester (IH) was a major American manufacturer of agricultural machinery, construction equipment, and vehicles from 1902 to 1985. Known for robust and reliable equipment.

Cadet Lineage:

The Cadet series was IH's line of small, utility tractors, often targeted at homeowners and small farms. The Cadet 75 was a key model in this series, evolving from earlier designs and preceding later models.

Production Years:

The Cadet 75 was produced roughly from the mid-1960s to the early 1970s, though exact years can vary by specific regional configurations.

Manufacturing Locations:

Primarily manufactured in the United States by International Harvester.

🏆 Awards & Recognition

Recognition Summary:

While specific awards for the Cadet 75 are not widely documented, International Harvester tractors of this era were generally recognized for their durability and workhorse capabilities in the agricultural community. The 'Cadet' name itself carried a reputation for quality in the homeowner tractor market.