Basic Information Identification Make: International Harvester Model: 674 Tractor Vehicle Type: Agricultural Tractor Codes Model Code: 674 Introduction Market Position Target Audience: Professional Technicians, Do-It-Yourself Mechanics, Restoration Enthusiasts Competitive Analysis Advantage: Provides the same detailed information as professional technician manuals, accessible via instant download. Key Features Illustration Detail: Detailed illustrations, drawings, and photos, with enlarged insets for critical parts examination. Instructional Format: Numbered instructions, bold figure numbers for easy cross-referencing with illustrations. Navigation: Numbered table of contents for quick information retrieval. Safety Information: Notes, cautions, and warnings integrated within repair procedures to highlight critical information. Manual Details Coverage Areas Coverage: Full Service Repair, Maintenance, Rebuilding, Refurbishing, Restoration, Diagnostics, Electrical Service, Troubleshooting Page Count Estimated Page Count: N/A (Digital format, variable rendering) Manual Type Type: Full Service Repair Manual Language Language: English Format Format: PDF Delivery Delivery Method: Instant Download Manual Coverage Systems Covered Engine: Detailed repair and overhaul procedures, fuel system, lubrication, cooling system, starting and charging system Transmission: Repair and maintenance of all transmission components, including gearboxes, clutches, and hydraulics Drivetrain: Front and rear axles, differentials, PTO (Power Take-Off) systems Hydraulics: Hydraulic pump, control valves, cylinders, lift systems, troubleshooting and repair Electrical: Wiring diagrams, troubleshooting, repair of all electrical components, lighting, ignition, instrumentation Braking System: Service and repair of all brake components, including hydraulic systems and parking brake Steering System: Maintenance and repair of the steering mechanism, including power steering components Chassis And Frame: Inspection and repair of frame, fenders, and mounting points Operator Station: Seat, controls, dashboard, and cab components (if applicable) Procedures Included Major Overhauls: Comprehensive procedures for engine, transmission, and hydraulic system rebuilds Routine Maintenance: Oil changes, filter replacements, lubrication schedules, pre-operation checks Troubleshooting: Systematic approach to diagnosing common and complex issues with detailed diagnostic trees Diagnostics: Fault finding procedures for all major systems Electrical Repair: Step-by-step repair guidance for wiring harness issues, component replacement, and circuit diagnostics Component Replacement: Detailed instructions for replacing individual parts and assemblies Calibration And Adjustment: Procedures for calibrating and adjusting various systems for optimal performance Technical Depth Depth: Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers all aspects from basic maintenance to complete rebuilds. Manual Features Diagnostic Tools: Includes troubleshooting and electrical service procedures combined with detailed wiring diagrams for ease of use. Manual Specifications File Format File Type: PDF Print Quality Printability: Full Printable Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Format) Requirements Software Requirements: Adobe PDF Reader, WinRAR Compatibility Operating Systems: All Versions of Windows & Mac File Storage Storage Options: Can be saved to hard-drive and burned to CD-ROM. Engine Specifications Primary Engine Engine Type: Diesel (Specific engine variant not detailed in product info, but typically a Perkins or International Harvester D-series engine for this model) Performance Horsepower: Typically in the range of 60-70 HP (Varies by specific engine variant) Torque: Specific values not provided in product description, but adequate for farm work. Fuel System Fuel Type: Diesel Injection System: Indirect Injection (Typical for this era and model) Engine Details Engine Manufacturer: International Harvester or Perkins (depending on specific build) Transmission Standard Transmission Type: Constant Mesh Gearbox with Synchromesh (Common configuration) Optional Gear Configurations: Typically 8 forward and 4 reverse gears. Features Clutch Type: Dual Clutch (for PTO operation) and Single Clutch (for transmission operation) are common. Dimensions Weights Operating Weight: Approximately 5,000 - 6,000 lbs (Varies based on configuration) Technology Features Infotainment Infotainment System: N/A (Basic agricultural equipment, focus is on function over comfort features). Driver Assistance Assistance Features: N/A Connectivity Connectivity Options: N/A Maintenance Service Intervals Engine Oil Change: Typically every 100-250 operating hours, depending on conditions. Hydraulic Fluid Change: Typically every 500-1000 operating hours. Air Filter Replacement: As needed, based on operating conditions, or per hourly recommendation. Fluid Specifications Engine Oil Type: API CD or CE rated diesel engine oil, SAE 30 or 15W-40 (refer to specific manual for exact grade and capacity). Hydraulic Fluid Type: Universal Tractor Transmission Oil (UTTO) or equivalent hydraulic fluid meeting IH B-6 specification. Coolant Type: Ethylene Glycol based antifreeze mixed with distilled water (50/50 ratio). Known Issues Common Wear Items: Clutch wear, hydraulic pump seals, PTO spline wear, starter motor issues. Electrical System Concerns: Corrosion on connections, aging wiring harness can lead to intermittent faults. Cooling System Maintenance: Regular flushing and checking of radiator and thermostat for optimal operation. Vehicle History Brand Heritage Brand History: International Harvester was a major American manufacturer of agricultural and construction equipment. Model Evolution Series Context: The 674 is part of the International Harvester 44/54/64/74 series of tractors, known for their reliability and versatility. Production Production Period: Mid-1970s to early 1980s Awards & Recognition Recognitions Industry Reputation: International Harvester tractors from this era are generally well-regarded for their robust build and mechanical simplicity.