🏷️ Basic Information Identification Make: International Harvester Model: 674 Tractor Model Designation: 674 Vehicle Type: Agricultural Tractor 👋 Introduction Market Position Target Audience: Professional technicians, DIY mechanics, tractor owners performing repairs and maintenance Key Features Delivery: Instant Download, no shipping costs or delays Benefit For Users: Enables users to perform maintenance and repairs themselves, saving on labor costs Document Origin: Written by manufacturers, original workshop manual content 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Maintenance, Diagnostics, Overhaul Page Count Estimated Pages: Hundreds (specific number not provided, but indicated as extensive) Manual Type Type: Workshop Service Manual, Repair Manual Language Language: English Format Delivery Method: Instant Download File Format: PDF 📖 Manual Coverage Systems Covered Engine: Full engine repair, overhaul, troubleshooting, diagnostics, fuel system, cooling system, lubrication system Transmission: Gearbox repair, clutch, power take-off (PTO), differential, final drives Hydraulics: Hydraulic system repair, pump, cylinders, valves, control systems Electrical: Wiring diagrams, starter, alternator, lighting, ignition system, troubleshooting Chassis: Frame, steering, suspension, axles, brakes Operator Station: Controls, dashboard, operator comfort features Procedures Included Maintenance: Periodic maintenance charts, lubrication schedules, fluid changes Repair: Step-by-step repair instructions for all major systems Troubleshooting: Diagnostic procedures for common and uncommon issues Overhaul: Complete engine and component overhaul procedures Technical Depth Depth: Comprehensive, suitable for professional technicians and advanced DIY mechanics 📊 Manual Specifications File Format Printability: Full Printable Zoom Capability: YES (Zoom IN/OUT) Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) Requirements Reader Software: Adobe PDF Reader Extraction Software: WinRAR Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Diesel Engine Family: International Harvester D-Series Displacement Cc: 3170 (approx. for common variants) Cylinder Count: 3 or 4 (depending on specific engine variant of the 674) Performance Horsepower Gross: Approx. 60-70 HP (specific figures vary by engine variant and tuning) Fuel System Fuel Type: Diesel Injection System: Inline injection pump (e.g., CAV, Bosch) 🔧 Transmission Standard Transmission Type: Manual Gear Configuration: Multiple forward and reverse gears (e.g., 8 forward, 4 reverse, or more with Hi-Lo range) Features Power Take Off Pto: Standard PTO, often 540 RPM and/or 1000 RPM Clutch Type: Dual-stage clutch (one for transmission, one for PTO) 📐 Dimensions Weights Operating Weight Kg: Approx. 2200-2500 kg (depending on configuration) Wheelbase Mm: Approx. 2050-2150 mm (depending on configuration) 🛡️ Safety Features Active Features Brakes: Hydraulic disc brakes (often internal expanding on rear axle) Passive Features Roll Over Protection: Optional ROPS (Roll-Over Protective Structure) may be fitted or available as an aftermarket addition. 💡 Technology Features Infotainment Infotainment System: Basic analog gauges for engine monitoring (oil pressure, temperature, fuel level, ammeter) Driver Assistance Operator Aid: Power steering (often hydrostatic) for ease of operation. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 250-500 hours or annually (specific interval detailed in manual) Air Filter Check: Daily or as needed based on operating conditions Fluid Specifications Engine Oil Type: API CD or CE rated diesel engine oil, SAE 10W-30 or 15W-40 (refer to manual for exact viscosity) Transmission Hydraulic Fluid: IH Hytran or equivalent universal tractor transmission fluid (UTTF) / UTF-M (refer to manual) Coolant Type: Ethylene glycol based antifreeze with corrosion inhibitors (50/50 mix with distilled water) Known Issues Common Wear Points: Clutch wear, PTO engagement issues, hydraulic system leaks, starter motor reliability, injector pump calibration Electrical Problems: Wiring harness degradation, corrosion on electrical connectors 📚 Vehicle History Brand Heritage Brand Significance: International Harvester was a major American manufacturer of agricultural machinery, construction equipment, and vehicles. Model Evolution Series Context: The 674 was part of IH's popular range of medium-duty tractors, known for their reliability and versatility. Production Production Years: Mid-1970s to early 1980s (approximate) 🏆 Awards & Recognition Recognitions Industry Standing: Recognized for robustness and reliability in its class during its production era.