Target Audience:
Do-it-yourself tractor owners and experienced mechanics.
Value Proposition:
Cost-effective solution for vehicle maintenance and repair, saving money on labor and parts.
Manual Usability:
Numbered instructions, bold figure numbers, detailed illustrations, notes, cautions, and warnings enhance ease of use and safety.
Electrical Diagnostics:
Combined troubleshooting procedures and detailed wiring diagrams simplify electrical system repairs.
Completeness:
Official, complete factory service manual covering all aspects of the Fiat 680-680DT tractor.
Engine Systems:
Engine overhaul, diagnostics, cooling system service, fuel system (carburetor/injection), lubrication system.
Drivetrain Systems:
Clutch service, transmission repair, differential and final drive overhaul, front axle and front-wheel drive systems, PTO operation and repair.
Chassis Systems:
Brake system service (including park brake), steering gear maintenance and repair, hydraulic system diagnostics and component service.
Electrical Systems:
Complete electrical system troubleshooting, wiring diagrams, starter, alternator, lighting, and accessory circuits.
Body And Controls:
Fenders, fuel tank, and platform service and removal.
Maintenance:
Regular servicing, fluid changes, filter replacements, lubrication points.
Troubleshooting:
Diagnostic procedures for common and uncommon faults across all systems, with specific guidance for electrical issues.
Repair:
Step-by-step instructions for component disassembly, repair, reassembly, and adjustment for all major systems.
Overhaul:
Detailed procedures for complete engine, transmission, and drivetrain component overhauls.
Adjustments:
Adjustment procedures for clutch, brakes, steering, and hydraulic controls.
Depth Level:
Comprehensive Factory Level
Detail Level:
Step-by-step instructions, hundreds of photos and illustrations, enlarged insets for detailed parts examination, notes, cautions, and warnings.
Engine Type:
Likely naturally aspirated diesel (specific engine code not provided in product info, but typical for Fiat 680 series).
Engine Family:
Fiat's 800 series tractors were typically powered by Fiat's own diesel engines.
Horsepower Range:
The 680 series typically offered around 70-75 HP, with variations possible.
Torque Characteristics:
Designed for robust torque delivery for agricultural applications.
Injection System:
Likely mechanical direct injection.
Transmission Type:
Likely a 12-speed (8 forward + 4 reverse) or similar mechanical gearbox, potentially with a high/low range.
Optional Features:
The 'DT' designation indicates it is a 'Dual Traction' (4WD) model, which is a significant drivetrain feature, not an optional transmission in the traditional sense.
Gear Selection:
Manual shift lever, likely with a separate lever for range selection.
Safety Standards:
Designed to meet agricultural machinery safety standards of its era.
Braking System:
Hydraulic disc brakes (likely wet disc brakes in the rear axle for improved performance and longevity), mechanical park brake.
Operator Protection:
Basic ROPS (Roll Over Protection Structure) might be an aftermarket addition or standard depending on market and year; standard safety guards for PTO and other moving parts.
Infotainment System:
N/A (Basic agricultural tractor, no modern infotainment features).
Driver Assistance Systems:
N/A (Basic tractor controls, no electronic driver assistance).
Connectivity Features:
N/A (No electronic connectivity features).
Engine Oil Change:
Typically every 250-500 operating hours, or annually.
Fuel Filter Replacement:
As needed or at major service intervals, often tied to oil changes or based on fuel quality.
Air Filter Service:
Regular inspection and cleaning (especially in dusty conditions), replacement as needed.
Engine Oil Type:
API CD or CE, SAE 15W-40 or 10W-30 depending on climate.
Transmission Hydraulic Fluid:
Often a universal tractor transmission fluid (UTTO) or an SAE 20W-30 tractor hydraulic oil compatible with wet brakes.
Coolant:
Ethylene glycol based antifreeze/coolant mixture (typically 50/50).
Common Wear Points:
Clutch wear, PTO spline wear, hydraulic pump output degradation, front axle kingpin wear (especially on DT models).
Electrical Gremlins:
Corrosion in wiring connectors, faulty switches, and starter motor issues can occur with age.
Engine Considerations:
Overheating due to radiator blockage, injector issues, and timing belt/chain wear (if applicable to the specific engine variant).
Manufacturer:
Fiat Trattori, a prominent Italian agricultural machinery manufacturer, later part of CNH Industrial.
Series Context:
The 680 was part of Fiat's highly successful '600' series, known for its reliability and versatility in its production era (late 1970s to early 1980s).
Production Period:
Circa late 1970s to early 1980s.
Manufacturing Location:
Primarily Italy.
Industry Recognition:
Fiat's 600 series tractors were widely recognized for their durability and performance in the agricultural sector during their production years.
Reliability Rating:
Generally considered reliable workhorses, though specific component longevity depends heavily on maintenance and usage.
Certification Standards:
Manufactured to meet the relevant agricultural machinery safety and performance standards of the late 20th century.
