Market Position:
The Fiat Trattori 680 was a versatile and robust tractor designed for a wide range of agricultural tasks. This manual positions itself as an essential resource for owners and operators of this classic machinery, enabling independent maintenance and repair.
Competitive Analysis:
In its era, the Fiat 680 series competed with similar tractors from manufacturers like John Deere, Massey Ferguson, International Harvester, and Ford. Its strength lay in its reliability, power output for its class, and Fiat's established presence in the agricultural sector. This manual caters to a niche market of dedicated Fiat Trattori enthusiasts and operators.
Key Features:
Provides step-by-step instructions for repairs and maintenance, detailed diagrams and illustrations, troubleshooting guides, and technical specifications. Empowers users to perform tasks that would otherwise require dealership intervention.
Manual Purpose:
To empower Fiat Trattori 680 owners and technicians with the knowledge and procedures necessary for effective self-service, maintenance, and repair, thereby extending the lifespan and optimizing the performance of the tractor.
Coverage Areas:
General Maintenance, Troubleshooting, Engine Service/Repair, Transmission Service/Repair, Brake System, Wiring Diagram, Electrical System, Suspension, Periodic Lubrication, Steering, Cooling System, Fuel Injection/Fuel System, Emission System, Engine Control System, Chassis/Body, Restraint System, Axle
Page Count:
N/A (Digital Download)
Manual Type:
Service Repair Manual
Compatibility:
Compatible with Windows and Mac operating systems. Requires Adobe PDF Reader and WinZip for opening.
Systems Covered:
Engine mechanical and electrical, Fuel system (injection and pump), Ignition system, Cooling system, Lubrication system, Exhaust system, Emission controls, Clutch, Transmission (gearbox and differential), Axles (front and rear), Propeller shafts, Steering system, Braking system (hydraulic and pneumatic aspects if applicable), Hydraulic system (lift, power steering), Electrical system (lighting, starting, charging, instrumentation), Chassis and frame, Bodywork, Pneumatic systems (if applicable), PTO (Power Take-Off) systems, Three-point hitch and implement controls.
Procedures Included:
Routine maintenance, Scheduled servicing, Component disassembly and reassembly, Component repair and overhaul, Diagnostic procedures for common faults, Troubleshooting guides, Electrical system testing and repair, Hydraulic system testing and repair, Engine tuning, Brake adjustments and repairs, Clutch replacement, Transmission overhaul, Axle alignment and repair, Steering system overhaul, Cooling system flushing and repair, Fuel system bleeding and component replacement, Emission system component testing and repair.
Technical Depth:
Comprehensive, covering from basic adjustments to complete unit overhauls, including detailed torque specifications, clearances, diagnostic flowcharts, and repair sequences. Suitable for both amateur mechanics and professional technicians.
Wiring Diagram Detail:
Comprehensive electrical schematics showing circuits for lighting, starting, charging, instrumentation, and any auxiliary electrical systems. Component identification and wire color coding would be provided.
Troubleshooting Methodology
Troubleshooting Methodology:
Systematic approach to diagnosing problems, starting with common issues and progressing to more complex diagnostics using symptoms and test procedures outlined in the manual.
Component Identification:
Detailed illustrations and part numbers (where applicable) for all major components and sub-assemblies, aiding in replacement and repair.
Torque Specifications:
Crucial torque values for cylinder head bolts, main bearings, rod caps, wheel nuts, and various other fasteners to ensure proper assembly and prevent component failure.
Measurement Specifications
Measurement Specifications:
Clearances for valve lash, piston ring gaps, bearing clearances, clutch plate thickness, and other critical dimensions required for rebuilding or adjustment.
Refurbishment Procedures:
Guidelines for cleaning, inspecting, and rebuilding worn or damaged components, including machining specifications if necessary.
Primary Engine:
Likely a Fiat 8000-series naturally aspirated diesel engine (e.g., 8045.05 or similar). Specific displacement, bore, stroke, and compression ratio would be detailed within the manual.
Performance:
Horsepower rating typically in the 60-70 HP range. Torque specifications and power curves would be available in the manual.
Fuel System:
Typically a direct injection diesel system, likely featuring a Bosch (or similar) inline fuel injection pump and injectors. Manual would detail pump timing, injection pressures, and injector testing.
Engine Type:
Naturally Aspirated Diesel
Displacement:
Likely in the range of 3.0 to 4.0 Liters (specifics in manual)
Bore X Stroke:
Detailed specifications would be found in the manual.
Compression Ratio:
Typical diesel compression ratios for the era would be around 16:1 to 20:1. Exact ratio would be specified in the manual.
Cooling System Capacity:
Manual would specify total coolant capacity, likely in the range of 10-15 Liters.
Oil Capacity:
Manual would specify engine oil capacity, typically around 8-10 Liters.
Fuel Filter Part Number:
Manual would list specific part numbers or cross-references for fuel filters (e.g., Fiat OEM or equivalent aftermarket).
Oil Filter Part Number:
Manual would list specific part numbers or cross-references for oil filters (e.g., Fiat OEM or equivalent aftermarket).
Standard:
Likely a constant mesh, non-synchronized gearbox with multiple forward and reverse gears, potentially a 10-speed or 12-speed transmission (e.g., 8 forward + 2 reverse, or 12 forward + 4 reverse with a splitter). Manual would cover clutch, gearbox, and differential overhaul.
Optional:
Some models might have featured a creeper gear or a dual-speed PTO. Specific optional transmissions or enhancements would be documented.
Features:
The manual would cover synchronization, gear shifting mechanisms, PTO engagement, and final drive units. Lubrication requirements and capacities for the transmission and associated components would be specified.
Gear Selection:
Manual lever operation, potentially with a range selector and gear shift levers.
Transmission Fluid Capacity
Transmission Fluid Capacity:
Manual would specify the capacity for the combined transmission, hydraulic, and differential unit, likely 30-40 Liters.
Exterior:
Overall length, width, height, wheelbase, and track width dimensions would be provided. These can vary slightly based on tire size and configuration.
Interior:
Focus would be on operator station ergonomics, control layout, and physical space for comfortable operation. Specific measurements are unlikely in a repair manual but operator comfort aspects would be discussed.
Cargo:
Not applicable for cargo in a traditional sense, but PTO and hitch load capacities would be detailed.
Weights:
Unladen weight, Gross Vehicle Weight (GVW), and specific axle load capacities would be provided. Ballasting recommendations might also be included.
Ground Clearance:
Specific ground clearance for front and rear axles would be detailed in the manual, crucial for fieldwork.
Turning Radius:
Manual would provide the turning radius with and without brake assist (if applicable), important for maneuverability.
Ratings:
While formal crash test ratings like modern passenger cars are not applicable, the manual would cover safety features and operational safety guidelines related to the tractor's design, stability, and power take-off operations.
Active Features:
Braking system effectiveness, steering precision, and PTO safety mechanisms (e.g., independent PTO engagement) would be covered. Safety switches and interlocks might also be detailed.
Passive Features:
Operator presence control, rollover protection (if fitted, though often an aftermarket addition for this era), guards for rotating parts, and proper seating would be discussed in terms of safe operation.
Service Intervals:
Daily checks: fluid levels (engine oil, coolant, hydraulic oil), tire pressure, visual inspection. Engine oil and filter change: typically every 250-500 operating hours. Air filter cleaning/replacement: as needed based on operating conditions. Fuel filter replacement: typically every 500 operating hours. Hydraulic oil and filter change: typically every 1000-1500 operating hours. Transmission oil change: typically every 2000 operating hours. Grease points: daily or weekly. Detailed schedule in manual.
Fluid Specifications:
Engine Oil: API CD or CE, SAE 15W-40 (or as specified by Fiat for ambient temperature). Coolant: Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. Hydraulic/Transmission Oil: Fiat specification PTO/Transmission oil (e.g., Tutela Transmission 10W-30 or equivalent) or universal tractor transmission fluid (UTTF) if specified. Brake Fluid: DOT 3 or DOT 4 for hydraulic brakes. Grease: Lithium-based EP2 grease for chassis lubrication.
Known Issues:
Wear on clutch components, potential leaks from hydraulic seals and lines, wear in transmission synchronizers, starter motor issues, injector pump calibration drift, and radiator leaks. The manual will provide diagnostic and repair procedures for these common wear-and-tear items.
Front Axle Lubrication:
Intervals and type of grease for front wheel bearings and kingpins would be detailed.
Rear Axle Lubrication:
Procedures for greasing PTO shaft splines and other rear axle components would be covered.
Steering System Maintenance
Steering System Maintenance:
Checks for play in the steering, lubrication of steering linkages, and potential bleeding procedures for power steering would be included.
Brake System Maintenance:
Inspection of brake pads/linings, adjustment of brake shoes/drums, checking brake fluid level and condition, and bleeding the hydraulic system.
Air Filter Type:
Likely a dry-type paper element air filter, possibly with a pre-cleaner or oil-bath type depending on the specific configuration.
Hydraulic Fluid Type:
Dedicated hydraulic fluid or a Universal Tractor Transmission Fluid (UTTF) that meets Fiat specifications for the hydraulic system, PTO, and transmission. Manual would specify approved types.
Brand Heritage:
Fiat Trattori (later FiatAgri) has a long and storied history in agricultural machinery, dating back to the early 20th century. Known for producing reliable and powerful tractors that were vital to agricultural modernization.
Model Evolution:
The 680 was part of Fiat's successful 60-series or similar lineup, representing a mid-range tractor offering. It evolved from earlier Fiat models and paved the way for subsequent generations of Fiat tractors, incorporating advancements in engine technology, hydraulics, and transmission design.
Production:
The Fiat Trattori 680 was produced likely in the 1970s and early 1980s. Production plants were located in Italy. Specific production years and quantities are often difficult to pinpoint without factory records but its widespread use indicates significant production runs.
Key Innovations Of Era:
The 680 likely benefited from Fiat's advancements in diesel engine technology, improved hydraulic systems for implement control, and more robust transmission designs compared to earlier models.
