🏷️ Basic Information

Make:

International Harvester

Model:

424 / 444

Product Type:

Workshop Service Repair Manual

Vehicle Codes:

IH 424, IH 444

👋 Introduction

Target Audience:

Owners and mechanics of International Harvester 424 and 444 tractors seeking to perform repairs, maintenance, and diagnostics.

Value Proposition:

Provides comprehensive factory-level repair information, saving costs associated with professional servicing and increasing owner knowledge of the machine.

Manual Benefits:

Hundreds of pages, printable, detailed photos and illustrations, step-by-step instructions, troubleshooting guides, electrical diagrams, notes/cautions/warnings.

Manual Usability:

Designed for ease of use with numbered instructions, bold figure references, and a clear table of contents.

📋 Manual Details

Covered Models:

International Harvester 424 Tractor, International Harvester 444 Tractor

Estimated Pages:

Hundreds (Specific count not provided in product information, but implies a comprehensive volume)

Type:

Official Full Factory Service Repair Manual

Language:

English

File Format:

PDF Download

📖 Manual Coverage

Major Systems:

Engine, Cooling System, Fuel System, Power Train, Front Axle, Clutch, Differential Lock, Electrical System, Brakes, Fenders, Fuel Tank & Platform, Final Drive, Front System, Front-Wheel Drive, Hydraulic System, Main Drive Bevel Gears And Differential, Park Brake, Power Steering System, Power Take-Off, Rear Axle, Steering Gear, Transmission

General Information:

Overview of the tractor, safety precautions, general maintenance guidelines, torque specifications.

Specifications:

Detailed technical data, including engine dimensions, clearances, tolerances, and performance parameters.

Engine Overhaul:

Complete rebuild procedures for the engine, including cylinder head, block, pistons, connecting rods, crankshaft, camshaft, timing, lubrication, and cooling systems.

Fuel System Repair:

Diagnosis and repair of fuel tank, lines, filters, injection pump, injectors, and exhaust system.

Power Train Service:

Maintenance and repair of the clutch, transmission, drive shafts, and differential units.

Axle And Drive Line:

Detailed coverage of front and rear axles, final drives, and any associated components.

Brake System Repair:

Inspection, adjustment, and overhaul of the braking systems.

Steering System Service:

Repair and adjustment of the steering gear and power steering components.

Hydraulic System Diagnostics:

Troubleshooting and repair of the hydraulic lift system, pump, control valves, and cylinders.

Electrical System Troubleshooting:

Comprehensive electrical diagnostics, including wiring diagrams, component testing, and troubleshooting guides for starting, charging, and lighting systems.

Body And Chassis:

Information on fenders, fuel tank, platform, and potentially front-end sheet metal.

Repair And Maintenance:

Complete disassembly, step-by-step repair instructions, troubleshooting, electrical diagnostics, service procedures

Troubleshooting Guides:

Systematic approach to diagnosing and resolving common and uncommon problems across all vehicle systems.

Diagnostic Charts:

Tables and flowcharts to aid in identifying the root cause of issues.

Adjustment Procedures:

Step-by-step instructions for adjusting various components, such as clutch engagement, brake pedal travel, and valve clearances.

Rebuilding Instructions:

Detailed guidance on how to disassemble, inspect, repair, and reassemble major components like engines, transmissions, and hydraulic systems.

Wiring Diagrams:

Clear and detailed electrical schematics for the entire tractor.

Depth:

Comprehensive coverage from general information and specifications to detailed component repair and electrical system troubleshooting, suitable for both DIY and experienced mechanics.

📊 Manual Specifications

Format:

PDF

Software Requirements:

Adobe PDF Reader or compatible PDF viewer.

Storage Options:

Can be saved to hard drive or burned to CD-ROM.

Printability:

Printable without any restriction

Binding Type:

Digital Download (printable)

Paper Type:

Not Applicable (Digital)

⚙️ Engine Specifications

Engine Type:

Diesel (Likely IH BD-series, specific models vary by variant, e.g., BD-144, BD-154, BD-206)

Horsepower Range:

Typically in the 30-50 HP range, depending on specific engine variant and model configuration.

Fuel Type:

Diesel

Injection System:

Likely rotary or inline injection pump (e.g., CAV, Simms, or Roosa Master).

Cooling Medium:

Water-cooled

Engine Disassembly And Reassembly:

Detailed procedures for engine overhaul, including cylinder head, pistons, crankshaft, camshaft, timing gears, and oil pump.

Engine Tuning:

Procedures for engine tuning, including fuel injection timing, idle speed, and governor adjustments.

🔧 Transmission

Transmission Type:

Manual

Gear Options:

Typically 8-speed or 10-speed constant mesh transmission with a high/low range selector (e.g., 4 forward gears + reverse in each range).

Power Takeoff:

Independent PTO (540 RPM standard, potentially 1000 RPM optional on some variants).

Transmission Rebuild:

Procedures for clutch, transmission gears, shafts, bearings, and shifting mechanisms.

📐 Dimensions

Base Weight:

Varies by configuration, but generally around 3,500 - 4,500 lbs (1,588 - 2,041 kg) without ballast.

Weight With Ballast:

Can be significantly increased with front and rear wheel weights.

🛡️ Safety Features

Braking System:

Drum brakes (mechanical) or potentially hydraulic drum brakes on rear wheels. Park brake system detailed.

Operator Platform:

Operator platform with fenders, footboards, and potentially mounting points for ROPS (Roll Over Protection Structure) on later models or as an option.

💡 Technology Features

Operator Interface:

Basic mechanical controls, gauges for oil pressure, temperature, ammeter/voltmeter, fuel level, and tachometer.

Power Steering:

Power steering system is detailed in the manual, offering easier steering for the operator.

Tractor Systems:

Focus is on mechanical and hydraulic systems, with a detailed section on the electrical system including wiring diagrams and troubleshooting.

🔧 Maintenance

Engine Oil Change:

Typically every 100-200 operating hours, depending on service conditions and oil type used. Manual will specify.

Engine Oil:

Diesel engine oil, typically SAE 30 or 10W-30 API CD or better. Manual will list exact API classification and viscosity.

Transmission Hydraulic Fluid:

IH HyTran fluid or equivalent UTF (Universal Tractor Transmission Fluid). Manual will detail specifications and capacity.

Coolant:

Ethylene glycol-based antifreeze mixture. Manual will specify concentration and type.

Brake Fluid:

If hydraulic brakes are present, DOT 3 or DOT 4 brake fluid may be specified. Manual will confirm.

Gear Oil Rear Axle:

Manual will specify API GL-4 or GL-5 gear oil for the transmission and rear axle housings.

Common Wear Items:

Clutch wear, starter motor issues, hydraulic pump and cylinder leaks, injector pump maintenance, carburetor adjustment (if gasoline variant exists), electrical system (wiring, switches).

Scheduled Maintenance:

Details on lubrication points, filter changes (oil, fuel, air), coolant flushes, and general inspections.

📚 Vehicle History

Manufacturer Legacy:

International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for its robust and reliable tractors.

Model Series Placement:

The 424 and 444 models were part of IH's utility tractor lineup, serving the needs of smaller farms and general purpose use.

Production Years:

Mid-1960s to early 1970s (exact ranges vary, but typically 1965-1974 approximately).