Tractor Segment:
Utility tractor, designed for a wide range of agricultural tasks.
Competitors:
Competed with models from manufacturers like Massey Ferguson, John Deere, Ford, and Same in its class.
Dt Designation:
Indicates 'Dual Traction' or 4WD capability, enhancing traction and performance.
Versatility:
Suitable for cultivation, planting, harvesting, and material handling.
Robust Construction:
Known for durable build quality characteristic of Italian agricultural machinery.
Engine:
Detailed diagnostics, repair, overhaul procedures, component specifications.
Transmission:
Operation, maintenance, disassembly, assembly, troubleshooting of power take-off (PTO) and gearbox.
Drivetrain:
Front and rear axle repair, differential, drive shafts, DT (Dual Traction) system.
Hydraulic System:
Hydraulic pump, valves, cylinders, linkage repair, PTO clutch operation.
Electrical System:
Wiring diagrams, starter, alternator, lighting, instrumentation, troubleshooting.
Braking System:
Brake adjustment, repair, hydraulic and mechanical components.
Steering System:
Steering column, linkages, and hydrostatic power steering (if equipped) repair.
Cooling System:
Radiator, thermostat, water pump, fan, coolant specifications.
Fuel System:
Fuel tank, filters, injection pump, injectors, troubleshooting.
Exhaust System:
Muffler, exhaust pipes, component inspection.
Operator Station:
Seat, controls, dashboard, safety features.
Body And Chassis:
Frame inspection, panel removal, fender mounting.
Preventive Maintenance:
Lubrication charts, fluid changes, filter replacements, inspection points.
Troubleshooting:
Diagnostic flowcharts and symptom-based problem solving for all major systems.
Major Repairs:
Engine rebuild, transmission overhaul, hydraulic system repair, axle rebuild.
Component Removal And Installation:
Step-by-step instructions for disassembling and reassembling components.
Torque Specifications:
Precise torque values for critical fasteners across all systems.
Special Tools:
Identification and usage of Fiat-specific tools required for certain procedures.
Depth:
Extremely detailed, covering everything from basic adjustments to complete engine and transmission rebuilds.
Diagnostic Capability:
Advanced diagnostic procedures, including electrical system troubleshooting using schematics.
Engine Make Model:
Fiat (Specific engine model typically associated with the 55-66 range, e.g., 8035 series)
Configuration:
3-cylinder, naturally aspirated, diesel engine
Engine Displacement:
Approx. 3.1 Liters (188 cu. in.)
Rated Horsepower:
Approximately 55 PTO horsepower (engine power may be slightly higher).
Peak Torque:
Specific torque figures vary, but designed for robust pulling power in its class.
Injection System:
Mechanical direct injection, typically Lucas or Bosch rotary injection pump.
Cooling Type:
Liquid-cooled (water-cooled)
Controls:
Typically met emissions standards of its era without complex electronic controls.
Gearbox Type:
Manual synchromesh gearbox
Number Of Gears:
Typically 8 forward and 2 reverse gears (or variations thereof).
Creeper Gear:
Optional creeper gear available for very low speed operations.
Pto System:
Multi-speed PTO (e.g., 540/1000 RPM) with independent clutch engagement.
Clutch Type:
Dry single or dual-plate clutch for transmission and PTO.
Differential Lock:
Rear differential lock for enhanced traction.
Overall Length:
Approx. 3.7 meters (145 inches) without front weights
Overall Width:
Approx. 1.7 meters (67 inches) at rear track
Wheelbase:
Approx. 2.1 meters (83 inches)
Operating Weight:
Approx. 2,300 - 2,500 kg (5,070 - 5,510 lbs)
Front Axle Weight:
Distributed by DT system for improved front traction.
Rear Axle Weight:
Carries the majority of the tractor's operating weight.
Engine Oil Change:
Typically every 250-300 operating hours, or annually.
Oil Filter Replacement:
Concurrent with engine oil changes.
Air Filter Maintenance:
Service based on operating conditions, typically checking/cleaning every 100 hours, replacement annually.
Fuel Filter Replacement:
Recommended every 500 operating hours or as needed.
Engine Oil Type:
API CD or CE, SAE 15W-40 (Check manual for precise specification and ambient temperature range).
Transmission Hydraulic Fluid:
Fiat specifications (e.g., UTTO, similar to CASE IH MS-1207 or John Deere JDM J20C/D) - Capacity approx. 35-40 liters.
Coolant Type:
Ethylene glycol-based antifreeze, typically 50% coolant / 50% distilled water.
Brake Fluid:
DOT 3 or DOT 4 hydraulic fluid (if applicable to the brake system).
Common Wear Items:
Clutch wear, PTO seal leaks, hydraulic pump wear, starter motor reliability.
Electrical Gremlins:
Older wiring harnesses can become brittle, leading to intermittent electrical issues.
Drivetrain Maintenance:
Regular lubrication of U-joints and driveshafts is crucial to prevent wear.
Manufacturer Origin:
Fiat Trattori (Italy), a significant player in agricultural machinery since the early 20th century.
Series:
Part of the Fiat 66 Series, a successful line of utility tractors known for reliability and performance.
Production Period:
The 66 Series was produced from the mid-1980s into the early 1990s.
Manufacturing Locations:
Primarily manufactured in Italy, with potential for assembly in other global locations.
Industry Awards:
While specific awards for the 55-66 DT are not widely documented, the 66 Series was recognized for its balance of power, efficiency, and affordability in the utility tractor market.
Reliability Rating:
Generally considered a reliable and durable tractor, especially when properly maintained.
Emissions Standards:
Met the emissions regulations in place during its production era.
