Market Segment:
Utility tractor for agricultural and general-purpose use.
Competitors:
Competed with models from Massey Ferguson, John Deere, Ford, and other major tractor manufacturers of its era.
Dtf Designation:
DTF signifies a 4WD (Four-Wheel Drive) tractor, enhancing traction and performance in challenging conditions.
Operator Comfort:
Designed for operator comfort and efficiency with a focus on ease of operation and maintenance.
Engine:
Detailed disassembly, assembly, inspection, and repair of engine components (pistons, rings, bearings, cylinder head, valves, timing components, lubrication system, cooling system)
Transmission:
Service and repair of the gearbox, clutch, PTO (Power Take-Off) clutch, differential, and final drives.
Hydraulics:
Repair and troubleshooting of the hydraulic system, including the pump, valves, cylinders, filters, and fluid lines.
Steering:
Service and repair of the steering system, including power steering components and linkages.
Brakes:
Maintenance, adjustment, and repair of the braking system, including brake discs, calipers, and lines.
Electrical:
Wiring diagrams, troubleshooting of starting and charging systems, lighting, instruments, and other electrical components.
Chassis:
Front axle, rear axle, suspension, and steering linkage service.
Body:
Information on fenders, hood, seat, and operator's platform.
Routine Maintenance:
Oil changes, filter replacements, lubrication points, fluid level checks, greasing intervals.
Troubleshooting:
Diagnostic procedures for common problems, fault finding charts, and symptom-based troubleshooting.
Rebuilding:
Detailed step-by-step instructions for overhauling major components like the engine, transmission, and hydraulic pump.
Adjustments:
Procedures for adjusting clutch engagement, brake pedal travel, valve clearances, and PTO engagement.
Depth:
Comprehensive, covering from basic fluid checks to full engine and transmission rebuilds.
Engine Manufacturer:
Fiat
Engine Model:
Likely a Fiat 8045 series engine or similar displacement four-cylinder diesel.
Displacement:
Approximately 3.5 liters (exact displacement varies based on specific engine variant)
Cooling System:
Water-cooled
Horsepower:
Approximately 55 HP (Flywheel Horsepower)
Torque:
Specifications available in the manual, typically around 170-190 Nm.
Injection Type:
Direct injection, typically with a Bosch inline fuel injection pump.
Oil Type:
API CG-4 or similar heavy-duty diesel engine oil (refer to manual for specific viscosity and API classification).
Oil Capacity:
Approximately 6.5 - 7.5 liters (including filter, refer to manual for exact capacity).
Transmission Type:
Mechanical Synchromesh gearbox.
Gears:
Typically 8 forward gears and 4 reverse gears (or similar configuration depending on specific model variant).
Creeper Gear:
Some models may have had optional creeper gear for very low-speed operation.
Pto Speed:
Standard 540 RPM PTO, with potential for 1000 RPM PTO as an option.
Clutch:
Dual-stage clutch for engaging transmission and PTO independently.
Wheelbase:
Typical wheelbase in the range of 2000-2200 mm (exact measurement available in manual).
Overall Length:
Around 3700-4000 mm (without implements).
Overall Width:
Around 1700-1800 mm (width varies with tire options).
Operating Weight:
Approximately 2200-2500 kg (unladen).
Front Axle Weight:
Typically around 800-1000 kg.
Rear Axle Weight:
Typically around 1400-1600 kg.
Rops Availability:
ROPS (Roll-Over Protective Structure) usually an option or fitted to later models, essential for safety.
Brake System:
Hydraulically operated disc brakes on rear wheels, often with independent parking brake.
Seatbelt:
Seatbelt often available or standard on tractors equipped with a safety frame or cab.
Instrument Cluster:
Basic dashboard with essential indicators for engine temperature, oil pressure, fuel level, battery charge, and tachometer.
Differential Lock:
Mechanical differential lock for improved traction in slippery conditions.
N A:
No modern digital connectivity features; analog controls and mechanical systems.
Engine Oil Change:
Typically every 250 hours or annually, whichever comes first. Refer to manual for exact interval.
Fuel Filter Replacement:
Recommended at 500-hour intervals or as needed if fuel quality is suspect.
Hydraulic Oil Filter:
Check and replace as per manual recommendations, often at major service intervals or if contamination is suspected.
Hydraulic Transmission Oil:
Use a high-quality UTF (Universal Tractor Transmission Oil) or a specified Fiat hydraulic fluid. Capacity around 30-40 liters (check manual).
Coolant Type:
Ethylene glycol based antifreeze mixture with a 50/50 concentration for freeze protection and corrosion inhibition.
Common Wear Items:
Clutch wear, PTO clutch engagement issues, hydraulic pump seal leaks, starter motor failure, and potential radiator leaks.
Electrical System Concerns:
Wiring harness degradation over time, alternator issues, and switch failures can occur.
Manufacturer History:
Fiat Trattori, established in 1919, became a leading global manufacturer of agricultural machinery.
66 Series Context:
The 66 series was a highly successful range of tractors introduced in the 1980s, known for their robustness and reliability.
55-66 Positioning:
Positioned as a medium-duty utility tractor, suitable for a wide range of agricultural tasks.
Production Period:
The 66 series, including the 55-66 DTF, was produced primarily during the 1980s and early 1990s.
