Market Position:
Designed for owners and mechanics seeking detailed repair and maintenance information for Fiat 680 and 680DT agricultural tractors, offering a cost-effective alternative to physical manuals and professional servicing for routine tasks.
Utility Focus:
The Fiat 680/680DT series tractors were designed for general-purpose agricultural work, offering a balance of power, reliability, and versatility for small to medium-sized farms.
Competitive Analysis:
Positions itself against traditional, often more expensive, printed service manuals by offering convenience, searchability, and cost savings in a digital PDF format. Highlights the advantage of on-demand printing of specific sections.
Key Features:
Complete factory service information, detailed step-by-step procedures, hundreds of photos and illustrations, covers all styles, printable, digital format for modern accessibility, supports DIY repair and maintenance.
Systems Covered:
General, Specifications, Engine, Cooling System, Fuel System, Power Train, Front Axle, Clutch, Differential Lock, Electrical System, Brakes, Fenders, Fuel Tank & Platform, Final Drive, Front System, Front-Wheel Drive (for DT models), Hydraulic System, Main Drive Bevel Gears and Differential, Park Brake, Power Steering System, Power Take-Off, Rear Axle, Steering Gear, Transmission
Engine Overhaul:
Complete engine disassembly, inspection, repair, and reassembly procedures, including piston ring replacement, bearing replacement, cylinder head overhaul, and valve adjustments.
Cooling System Maintenance:
Radiator service, thermostat replacement, water pump repair, coolant flush and fill procedures, and troubleshooting overheating issues.
Fuel System Diagnostics:
Troubleshooting fuel starvation, pump timing, injector testing, and cleaning/replacing fuel lines and filters.
Powertrain Repair:
Detailed procedures for the entire drivetrain, including clutch, transmission, differential, and final drives, covering bearing replacements, seal replacements, and gear inspections.
Hydraulic System Service:
Repair and maintenance of the hydraulic pump, control valves, lift arms, cylinders, and associated hoses and fittings. Includes hydraulic fluid specifications and bleeding procedures.
Electrical System Troubleshooting:
Wiring diagrams, starter motor, alternator, battery maintenance, lighting systems, and troubleshooting electrical faults.
Brake System Overhaul:
Brake caliper/cylinder repair, brake pad/shoe replacement, brake fluid flush and bleed, and parking brake adjustment.
Steering System Repair:
Power steering pump, steering cylinder, steering linkages, and wheel alignment procedures.
Pto Operation And Maintenance:
Details on the Power Take-Off (PTO) system, including engagement, speeds, and any maintenance requirements.
Front Wheel Drive Maintenance:
Specific to the 680DT model, this would cover the engagement mechanism, front axle lubrication, and any maintenance for the 4WD system.
Procedures Included:
Step-by-step repair instructions, complete disassembly guidance, troubleshooting, maintenance, overhaul procedures, component repair, adjustments
Engine Timing Adjustment:
Precise instructions for setting injection pump timing and valve timing.
Torque Specifications:
Essential torque values for critical fasteners across all systems to ensure correct assembly and prevent damage.
Troubleshooting Charts:
Diagnostic flowcharts and symptom-based troubleshooting guides for common problems.
Special Tool Identification:
Identification of any specialized tools required for specific repair procedures.
Wheel Alignment And Tracking:
Procedures for checking and adjusting wheel alignment, especially critical for steering precision and tire wear.
Technical Depth:
Comprehensive factory-level detail suitable for DIYers and experienced mechanics, including detailed disassembly, repair, and reassembly
Diagnostic Procedures:
In-depth diagnostic procedures for identifying the root cause of malfunctions in engine, transmission, hydraulics, and electrical systems.
Rebuild Procedures:
Detailed instructions for completely rebuilding major components such as the engine, transmission, hydraulic pump, and steering system.
Component Identification:
Clear identification of all parts and components within each system, often with exploded views.
Factory Specifications:
All technical specifications within the manual align with the original factory standards and tolerances for optimal performance and longevity.
Primary Engine:
Fiat diesel engine (specific model designation not provided in product info, but typically a 4-cylinder overhead valve diesel for this series)
Performance:
Detailed engine specifications, including cylinder bore, stroke, displacement, compression ratio, power output, and torque curves would be found within the manual. Based on historical data, expect approximately 65-75 HP for the 680 series.
Fuel System:
Covers fuel injection pump (e.g., Bosch or CAV), injectors, fuel filter replacement, bleeding the fuel system, and troubleshooting fuel delivery issues.
Engine Type:
Naturally aspirated, direct-injection diesel engine.
Engine Bore Stroke:
Specific bore and stroke dimensions will be detailed in the manual to calculate displacement (typically in the range of 3.5-4.0 liters for this class of tractor).
Service Intervals:
The manual provides detailed recommended service intervals for engine oil changes, filter replacements (oil, fuel, air), hydraulic fluid changes, transmission fluid checks, and general lubrication points.
Fluid Specifications:
Specifies exact types and quantities for engine oil (e.g., API CF or similar), coolant, hydraulic fluid (e.g., Fiat Type 'A' or universal tractor transmission fluid - UTTO), and transmission oil. Also includes grease types for various lubrication points.
Known Issues:
While not explicitly stated as a 'known issues' section, the manual's comprehensive troubleshooting guides would implicitly address common wear items and potential problems such as hydraulic leaks, clutch wear, transmission synchronization issues, and engine component maintenance.
Tire Pressure:
Recommended tire pressures for front and rear wheels based on typical operating loads and conditions.
