Basic Information Identification Make: International Harvester Model: 674 Tractor Codes Product Name: International Harvester 674 Tractor All Service Repair Manual Download Introduction Market Position Target Audience: Tractor owners, independent mechanics, DIY enthusiasts seeking to perform repairs and maintenance Competitive Analysis Value Proposition: Provides comprehensive, DIY-friendly repair instructions to save money and ensure quality of work Key Features Accessibility: Instant download, available on multiple devices Empowerment: Enables users to understand and perform complex repairs independently Manual Details Coverage Areas Main Coverage: All aspects of repair, maintenance, and troubleshooting Manual Type Type: Service and Repair Manual Language Language: English Format Format: PDF Page Count Estimated Pages: Varies by specific printing, but typically hundreds of pages for a comprehensive service manual. Exact count not provided. Manual Coverage Systems Covered Engine: Engine Service/Repair, Fuel Injection/Fuel System, Cooling System, Emission System, Engine Control System Drivetrain: Transmission Service/Repair, Axle Chassis: Brake System, Suspension, Steering, Chassis/Body Electrical: Wiring Diagram, Electrical System Attachment Control: Hydraulic system, three-point hitch operation and maintenance Powertrain: Engine, clutch, transmission, final drives, and PTO systems Control Systems: Steering system, braking system, and implement control hydraulics Instrumentation: Dashboard gauges, warning lights, and their functions Air Intake: Air cleaner assembly, intake manifold, turbocharger (if applicable) Exhaust System: Exhaust manifold, muffler, exhaust piping Fuel Tank And Lines: Fuel tank removal, fuel lines, filters, and pump service Hitch System: Three-point hitch, draft control, position control mechanisms Procedures Included Maintenance: General Maintenance, Periodic Lubrication Troubleshooting: Troubleshooting Repair: Disassemble, Reassemble, Repair, Service, Maintain, Refurbish, Renovate, Mend, Fix Diagnostics: Troubleshooting guides and diagnostic procedures for various systems Calibration: Calibration procedures for engine parameters or hydraulic systems if applicable Replacement: Procedures for replacing worn or faulty components across all systems Technical Depth Depth: Comprehensive, covering all intricacies and peculiarities of design and construction Engine Rebuild: Detailed procedures for engine disassembly, overhaul, and reassembly Transmission Overhaul: Instructions for transmission disassembly, component inspection, and reassembly Torque Specifications: Detailed torque specifications for all major fasteners and components Hydraulic Schematics: Detailed hydraulic system diagrams and troubleshooting Manual Specifications File Format Compatibility: All versions of Windows & Mac Required Software: Adobe PDF Reader & WinZip Print Quality Quality: High-quality PDF for clear viewing and printing Binding Type Binding: Digital Download (No physical binding) Paper Type Paper: N/A (Digital Format) Engine Specifications Primary Engine Engine Type: Diesel (Specific engine model not provided in product information, but typically British Leyland or similar for the era) Bore X Stroke: Refer to specific engine type within the 674 model; manual will detail this. Cylinder Count: Likely 3 or 4 cylinders for this model series. Performance Horsepower: Typically in the range of 50-70 HP (Exact specification for 674 model not provided, requires manual reference) Torque: Refer to specific manual for precise torque figures Fuel System Fuel Type: Diesel Injection System: Indirect injection (Typical for this era, specific details in manual) Transmission Standard Transmission Type: Manual Synchromesh (Likely a 8/4 or 16/8 speed gearbox, specific details in manual) Optional Optional Features: Power Take-Off (PTO) speeds, possibly creeper gears depending on configuration Features Gear Selection: Manual shifting with clutch engagement Dimensions Exterior Length: Refer to specific manual for precise dimensions Width: Refer to specific manual for precise dimensions Height: Refer to specific manual for precise dimensions Weights Operating Weight: Refer to specific manual for precise weight figures Safety Features Ratings Rollover Protection: Likely optional ROPS (Roll-Over Protective Structure) or safety frame, check manual for details Active Features Braking System: Hydraulic disc brakes (Typically inboard dry or wet discs, refer to manual for specific type and maintenance) Passive Features Seatbelt: Seatbelts likely available as an option or integrated with ROPS Technology Features Infotainment System: N/A (Basic agricultural machinery, no infotainment features) Driver Assistance Features: N/A (No advanced driver-assistance systems) Connectivity Features: N/A (No electronic connectivity features) Maintenance Service Intervals Engine Oil Change: Refer to manual for specific interval (typically 100-250 hours or annual) Transmission Fluid Change: Refer to manual for specific interval (typically 500-1000 hours) Fluid Specifications Engine Oil: Refer to manual for SAE viscosity grade and API service classification (e.g., API CD or CE, SAE 15W-40 or 20W-50) Hydraulic Fluid: Refer to manual for type and specification (e.g., IH Hy-Trans, universal tractor transmission fluid (UTTF)) Coolant: Refer to manual for type and mixture ratio (e.g., Ethylene Glycol with corrosion inhibitors) Known Issues Common Wear Points: Clutch wear, hydraulic system leaks, PTO engagement issues, starter motor reliability (refer to manual for specific diagnostics) Electrical Faults: Wiring harness degradation, switch failures (detailed troubleshooting in manual) Vehicle History Brand Heritage Brand Legacy: International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for its robust and reliable machinery. Model Evolution Model Lineage: The 674 was part of IH's broader tractor lineup, often positioned as a versatile utility tractor for small to medium-sized farms. Production Production Years: Likely produced in the 1970s, specific...