The Fiat Trattori 680 and 680DT represent robust agricultural machinery from the late 1970s to the 1980s, known for their durability and performance. These Italian-engineered tractors, powered by reliable diesel engines from the Fiat 8000 series, offer substantial horsepower and torque suitable for a wide range of farming tasks. Featuring a manual synchromesh transmission, often with multiple forward and reverse gears, and equipped with essential functionalities like a multi-speed Power Take-Off (PTO) and a rear differential lock, the 680 series is designed for efficiency and power. The 'DT' designation signifies the Dual Traction (4WD) variant, enhancing its capability in challenging conditions. This comprehensive factory service repair manual provides essential guidance for owners, mechanics, and technicians. It covers all aspects of maintenance, troubleshooting, and repair for the Fiat Trattori 680 and 680DT models. Detailed instructions are provided for engine overhaul, transmission systems including clutch and PTO, hydraulic systems, electrical components, and chassis elements such as steering, axles, and brakes. The manual includes systematic diagnostic procedures, fault-finding charts, and precise technical specifications, ensuring that all service and repair tasks can be performed efficiently and accurately, ultimately saving time and resources. 🏷️ Basic Information Identification Make: Fiat Trattori Model: 680 / 680DT 👋 Introduction Market Position Target User: Owners, mechanics, and technicians specializing in Fiat Trattori agricultural equipment. Competitive Analysis Value Proposition: Provides all necessary information to perform repairs and maintenance efficiently, saving time and money compared to professional dealer service or guesswork. Key Features Accessibility: Easy navigation with a table of contents for quick information retrieval. Convenience: Instant download for immediate access to repair information. 📋 Manual Details Coverage Areas Primary Coverage: Complete service, repair, maintenance, and troubleshooting for Fiat Trattori 680 and 680DT models. Page Count Estimated Page Count: Extensive (Specific page count not provided, but described as comprehensive for all service and repair information). Manual Type Type: Factory Service Repair Manual / Workshop Manual / Troubleshooting Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine overhaul, diagnosis, fuel system, cooling system, lubrication system, starting and charging. Transmission: Transmission overhaul, clutch, gearbox, differential, final drives, PTO (Power Take-Off). Hydraulics: Hydraulic system diagnosis, pump, cylinders, control valves, hydraulic oil specifications. Electrical: Wiring diagrams, starter motor, alternator, lighting, instrumentation, electrical component testing. Chassis And Body: Frame, steering system, front axle, rear axle, brakes, wheels, tires, body panels, hitch. Steering: Manual steering system overhaul, hydraulic power steering components and diagnosis. Brakes: Brake system maintenance, repair, bleeding, adjustment, and hydraulic components. Front Axle: Front axle components, kingpins, bearings, steering knuckles (especially for DT 4WD models). Rear Axle: Rear axle housing, differential, final drives, and associated bearings. Procedures Included Maintenance: Scheduled maintenance, lubrication, fluid checks and changes, filter replacement, greasing points. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, fault finding charts. Repair: Detailed step-by-step repair instructions for all major and minor components, assembly and disassembly. Specifications: Torque values, clearances, adjustments, tolerances for all mechanical and electrical components. Recalibration: Calibration of instruments, hydraulic controls, and PTO speeds as applicable. Assembly Disassembly: Detailed instructions for complete engine, transmission, and hydraulic system teardown and reassembly. Technical Depth Depth: Comprehensive: Covers routine maintenance, diagnostics, component overhaul, and complete system rebuilding. Suitable for professional mechanics and experienced owners. 📊 Manual Specifications File Format Compatibility: Compatible with all versions of Windows and Mac. Software Requirements: Adobe PDF Reader, WinZip. Print Quality Quality: High-quality PDF with clear diagrams and text, suitable for printing. Binding Type Binding: Digital (PDF - no physical binding). Paper Type Paper Type: Digital (PDF - no physical paper type). ⚙️ Engine Specifications Primary Engine Engine Type: Diesel Engine Family: Fiat 8000 series (likely based on the Fiat OM CO3 engine family). Performance Displacement Cc: Typically around 3.8 - 4.5 liters (exact specification depends on specific variant, e.g., 680 N, 680 S). Horsepower Hp: Around 60-70 HP (exact figure varies by model and rating). Torque Nm: Specific torque figures would be detailed in the manual. Fuel System Injection System: Direct Injection (typically Bosch or similar injection pump). Fuel Type: Diesel Fuel Cooling System Cooling Method: Water-cooled 🔧 Transmission Standard Type: Manual Synchromesh Transmission Gear Speeds: Typically 8 forward speeds and 4 reverse speeds, potentially with a creeper gear option or dual-speed PTO. Optional Options: Dual-clutch (non-synchronized) or other transmission configurations might exist for specific markets or variants. The 'DT' in 680DT typically denotes a 'Dual Traction' (4WD) variant. Features Pto: Multi-speed Power Take-Off (PTO) is a standard feature, often 540/1000 RPM, with ground speed PTO also possible. Differential Lock: Rear differential lock is a common feature on these tractors for improved traction. 📐 Dimensions Exterior Wheelbase Mm: Specific dimensions would be detailed in the manual; typically in the range of 2100-2250 mm for tractors of this class. Weights Operating Weight Kg: Approximately 2500-3000 kg, depending on configuration (e.g., 2WD vs. 4WD, presence of...