This workshop service repair manual covers the International Harvester 684 Tractor, produced from the mid-1970s to the early 1980s. Renowned for their durability and robust construction, International Harvester tractors have a significant legacy in the agricultural industry. The 684 model is a key part of this heritage, offering reliable performance in the medium-horsepower utility tractor segment. This manual provides comprehensive factory-level service and repair information, including detailed substeps, notes, cautions, and warnings, to help you understand and maintain your tractor effectively. This manual is designed for both do-it-yourself owners and experienced mechanics, offering hundreds of pages of essential information. It covers all major systems, including the engine, lubrication, cooling, fuel, clutch, transmission, drive train, rear and front axles, brakes, steering, suspension, bodywork, intake and exhaust, and hydraulic and electrical systems. Detailed procedures for disassembly, servicing, routine maintenance, and advanced troubleshooting are provided, along with wiring diagrams and part identification illustrations. The manual's extensive coverage ensures you have the resources needed for effective maintenance and repair. 🏷️ Basic Information Identification Make: International Harvester Model: 684 Tractor Product Type: Workshop Service Repair Manual 👋 Introduction Market Position Target Audience: Do-it-yourself owners and experienced mechanics Key Features Value Proposition: Save money, understand and maintain your tractor effectively. Delivery Method: Instant download upon payment completion 📋 Manual Details Coverage Areas Primary Coverage: IH International Harvester 684 Tractor Page Count Estimated Pages: Hundreds of pages (print-ready) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: IH International Harvester 684 Tractor Engine Lubrication System: IH International Harvester 684 Tractor Lubrication System Cooling System: IH International Harvester 684 Tractor Cooling System Fuel System: IH International Harvester 684 Tractor Fuel System Disassembly Servicing: IH International Harvester 684 Tractor Disassembly and Servicing General Information: IH International Harvester 684 Tractor General Separation Procedures: IH International Harvester 684 Tractor Separation Clutch: IH International Harvester 684 Tractor Clutch Transmission: IH International Harvester 684 Tractor Transmission Drive Train: IH International Harvester 684 Tractor Drive Chain & Sprockets Rear Axle: IH International Harvester 684 Tractor Rear Axle Brakes: IH International Harvester 684 Tractor Brakes Front Axle: IH International Harvester 684 Tractor Front Axle Steering: IH International Harvester 684 Tractor Steering Suspension: IH International Harvester 684 Tractor Shocks Bodywork: IH International Harvester 684 Tractor Body Work Intake Exhaust: IH International Harvester 684 Tractor Intake & Exhaust Hydraulic System: IH International Harvester 684 Tractor Hydraulic System Electrical System: IH International Harvester 684 Tractor Electrical System Routine Maintenance: IH International Harvester 684 Tractor Routine Maintenance Troubleshooting: IH International Harvester 684 Tractor Advanced Troubleshooting Wiring Diagrams: IH International Harvester 684 Tractor Wiring Diagram Procedures Included Repair Procedures: Step-by-step instructions for complete disassembly and servicing Diagnostics: Advanced troubleshooting for electrical and mechanical systems Maintenance: Routine maintenance procedures and schedules Technical Depth Depth: Comprehensive factory-level service and repair information Detail Level: Hundreds of photos and illustrations, detailed substeps, notes, cautions, and warnings 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Printable without restriction Binding Type Binding: Digital Download (Printable pages) Paper Type Medium: Digital PDF Software Requirements Reader: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Diesel (Specific engine model to be detailed in manual) Performance Horsepower Range: Likely in the 50-70 HP range, specific to engine variant (Manual to confirm) Fuel System Injection System: Details on injection pump, injectors, and fuel delivery system to be found in manual. 🔧 Transmission Standard Transmission Type: Likely a manual gearbox with multiple speeds (e.g., 8-speed or 16-speed transmission variants). Features Gear Selection: Manual gear shifting, potentially with a high/low range selector. 📐 Dimensions Weights Operating Weight: Approximately 4500-5500 lbs (2040-2500 kg), manual will provide exact figures. Wheelbase: Manual will specify exact wheelbase measurement. 🛡️ Safety Features Active Features Braking System: Serviceable details on internal expanding shoe or disc brakes, parking brake operation. 💡 Technology Features Infotainment Instrument Panel: Basic instrumentation including tachometer, oil pressure, temperature, and fuel gauges. Detailed in electrical section. Driver Assistance Pto Engagement: Manual will cover proper operation of Power Take-Off (PTO) engagement. Connectivity Wiring Diagrams: Comprehensive wiring diagrams for electrical system troubleshooting and repair. 🔧 Maintenance Service Intervals Engine Oil Change: Typically 250 hours or annually, specific interval detailed in manual. Transmission Fluid Change: Check manual for specific intervals and fluid type. Fluid Specifications Engine Oil: API CD or CE classification, SAE 15W-40 or 10W-30 recommended (Manual will specify exact grade and capacity). Hydraulic Fluid: IH Hy-Trans fluid or equivalent, specified capacity in manual. Known Issues Common Wear Items: Clutch wear, hydraulic pump seals, electrical connections can be common issues. Manual will detail diagnostics. Parts Identification Illustration Reference: Manual includes detailed illustrations and callouts for part identification. 📚 Vehicle History Brand Heritage Manufacturer: International Harvester (IH), a historic American manufacturer of agricultural and construction machinery. Model Evolution Series: Part of the International Harvester range...