Target User:
Owners, mechanics, and technicians requiring in-depth repair and maintenance knowledge for the Fiat 55-66 DT Tractor.
Value Proposition:
Provides the essential, detailed technical data necessary for efficient and accurate servicing, reducing downtime and repair costs.
Instant Download:
No shipping costs or delays, immediate access to critical repair information.
Engine:
Detailed overhaul, diagnosis, lubrication, cooling, fuel, exhaust, starting and charging systems.
Transmission:
Repair and overhaul of gearbox, differential, PTO, and drive shafts.
Hydraulics:
Operation, maintenance, troubleshooting, and repair of the hydraulic system, including pumps, valves, cylinders, and linkage.
Chassis:
Front axle, rear axle, steering system, braking system, and hitch system.
Electrical:
Wiring diagrams, starter motor, alternator, battery, lighting, and instrumentation.
Maintenance:
Routine maintenance, lubrication points, service intervals, fluid capacities, and filter specifications.
Troubleshooting:
Diagnostic charts for common problems, fault finding, and corrective actions.
Repair:
Step-by-step repair instructions for all major components and systems, including disassembly and reassembly.
Specifications:
Detailed torque specifications, clearances, tolerances, and settings for all mechanical components.
Depth:
Comprehensive from basic adjustments and routine servicing to complete engine, transmission, and hydraulic system overhauls.
Engine Family:
Likely Fiat 8000 series or similar displacement diesel.
Cylinder Count:
Typically 4-cylinder for this horsepower range.
Horsepower Rating:
Approximately 55 HP (drawbar horsepower, PTO horsepower may differ).
Torque Output:
Refer to manual for specific torque figures and RPMs.
Injection System:
Indirect Injection (IDI) or Direct Injection (DI), depending on specific engine variant. Manual will detail specific type.
Fuel Filter Part Number:
Requires specific part number lookup within the manual based on engine serial number.
Transmission Type:
Mechanical Synchromesh, likely with multiple ranges (e.g., 8 forward + 4 reverse or similar).
Optional Features:
Likely includes Power Take-Off (PTO) options (e.g., 540/1000 RPM) and potentially creeper gears or specific field PTO options.
Gear Ratios:
Detailed gear ratio charts will be present in the manual.
Transmission Fluid Spec:
Refer to manual for exact specification (e.g., API GL-4 or GL-5, specific tractor transmission fluid (TTF) or universal tractor transmission oil (UTTO)).
Transmission Fluid Capacity:
Refer to manual for specific fluid capacity in liters/gallons.
Wheelbase:
Varies by configuration, but generally in the range of 2100-2300 mm.
Track Width Front:
Adjustable, refer to manual for specific settings.
Track Width Rear:
Adjustable, refer to manual for specific settings.
Operating Weight:
Typically around 2500-3000 kg without ballast.
Max Allowable Weight:
Refer to manual for tractor's Gross Vehicle Weight Rating (GVWR).
Rollover Protection:
ROPS (Roll-Over Protective Structure) likely standard or optional, manual will detail installation and inspection.
Braking System:
Hydraulically operated, enclosed, wet disc brakes. Manual covers adjustment and maintenance.
Seatbelt:
Seatbelt system for ROPS equipped tractors. Manual will specify inspection.
Infotainment System:
Basic analog instrumentation (tachometer, temperature gauge, oil pressure light, etc.). No modern infotainment systems.
Driver Assistance Features:
None. Focus is on mechanical operation and driver control.
Connectivity Options:
None. Designed for rugged agricultural use.
Engine Oil Change:
Typically 250-500 hours, refer to manual for exact interval and engine type.
Hydraulic Oil Change:
Typically 500-1000 hours, refer to manual for exact interval.
Engine Oil Type:
Refer to manual for specific SAE viscosity grade (e.g., 15W-40) and API service classification (e.g., CI-4 or CD).
Coolant Type:
Ethylene Glycol based antifreeze, typically a 50/50 mix with distilled water. Manual will specify concentration and type.
Grease Type:
General-purpose lithium-based grease, specified in manual for various lubrication points.
Common Wear Items:
Clutch wear, hydraulic pump efficiency, PTO spline wear, and potential for electrical connector corrosion are common in older tractors.
Preventative Measures:
Regular fluid and filter changes, proper greasing, and checking for leaks are crucial for longevity. Manual details these procedures.
Manufacturer:
Fiat Trattori (later part of New Holland).
Series Context:
Part of the Fiat 66 Series, which was a highly successful range of utility tractors known for their reliability and versatility.
Production Period:
The 66 Series tractors were produced from the mid-1980s through the 1990s.
Manufacturing Location:
Likely manufactured in Italy or other Fiat Trattori plants.
Industry Recognition:
The Fiat 66 Series was widely recognized for its robust construction, reliability, and excellent performance in its class.
Durability Rating:
High durability and longevity were hallmarks of this series, supported by extensive field use and positive operator feedback.
Product Certification:
Manufactured to relevant European agricultural machinery standards of the time.
