From controls and instruments through lift operation, servicing, the electrical system, and winter storage, the Fiat 55-46 operator manual PDF (OEM 603.64.016.00R) works the 55-46 and 65-46 tractors front to back in 80 pages, DT, 12-speed, no-spin, and cab versions included. A factory wiring diagram anchors the electrical section, so a charging fault or a dead gauge gets traced on paper first. Nearly a fifth of the book goes to lift operation, matching draft control and three-point hitch settings to mouldboard plows, disc plows, subsoilers, and cultivators. Change engine oil at 200 hours and torque wheel nuts to 294 N·m; both figures are factory print, not forum guesswork. Guessing costs twice: the wrong part, then what it ruins. Bookmarked and keyword searchable, the PDF also hands you your frame and engine numbers off the identification data page, so the parts order lands right the first time and you are back in the field while the weather holds.
What's Inside This Fiat 55-46, 65-46, 55-46 DT, 65-46 DT Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Service | 4-8 | Authorized Shops, Repair Work, Overhaul Work, Service Assistance |
| Identification Data | 9 | Tractor Data Plate, Engine Type, Engine Number |
| Safety Precautions | 10-15 | Safety Alert Sign, Tractor Starting, ROPS Frame, PTO Shaft, Towing, Maintenance |
| Controls and Instruments | 16-21 | Hand Throttle Lever, PTO Clutch Lever, Accelerator Pedal, Brake Pedals, Remote Control Valve Lever, Hydraulic Lift Control Lever |
| Operation | 22-26 | Engine Starting, Engine Stopping, Tractor Starting, Tractor Stopping, Towing, Agricultural Implements |
| Guide to Lift Operation | 27-42 | Mouldboard Plows, Disc Plows, Harrows, Subsoilers, Cultivators, Weeders |
| Servicing Schedule | 43-49 | Oil Sump, Air Cleaner, Fuel Filter, Engine Oil Filter, Lift Oil Filter, Front Final Drive Oil |
| Electrical System | 50-52 | Battery, Alternator, Regulator, Fuses, Headlamp Alignment, Wiring Diagram |
| Specification | 53-58 | Engine, Cooling System, Drive Train, Transmission, Rear Transmission, Front Axle |
| 55-46 DT, 65-46 DT Four Wheel Drive | 59-63 | Parking Emergency Brake, Live Front Axle, Front Tires, Steering, Track Widths |
| Twelve-Speed Version | 64 | Gear Lever Positions, Range-Change Lever Positions |
| No-Spin Version | 65-67 | Front Axle Ring Gear Housing, Splined Sleeves, Dog Clutch Rings, Differential Unit |
| Heated and Ventilated Cab Version | 68-75 | Doors, Back Light, Side Windows, Windshield, Ashtray, Floodlight, Windshield Washer, Windshield Wiper |
| Tractor Storage | 76 | Engine |
| Servicing Chart | 78-80 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery Capacity | 88/92 Ah or 110/120 Ah | p. 58 |
| Battery Voltage | 12 V | p. 58 |
| Engine Oil Change Interval | 200 hours | p. 43 |
| Front Wheel Nut Torque | 294 N·m | p. 35 |
| Front Axle Beam Extension Bolt Torque | 220 N·m | p. 35 |
| Front Axle Track Rod Clamp Bolt Torque | 39 N·m | p. 35 |
| Maximum Water Pressure in Tire | 4 bar | p. 41 |
| Engine Valve Clearance (Intake) | 0.25 mm | p. 44 |
| Engine Valve Clearance (Exhaust) | 0.35 mm | p. 44 |
| Fuel Injector Release Pressure | 230 to 238 bar | p. 44 |
Fiat 55-46, 65-46, 55-46 DT, 65-46 DT Common Problems This Manual Covers
Fiat 55-46 engine cranks slowly and refuses to fire on cold mornings
Check the thermostarter procedure on page 23 before repeated cranking; it also explains how to space start attempts so you preserve the battery. Verify electrolyte level and state of charge following page 50, and confirm the battery matches the 88/92 Ah or 110/120 Ah rating listed on page 58 before frost season.
Manual Section: Engine Starting (Cold Climates) p. 23Engine suddenly races to full RPM and will not slow down with the hand throttle
Check the hand throttle and accelerator pedal linkage for binding (control layout on page 17) after shutting the engine down with the stop control shown on page 22. Inspect the sump level and drain any overfill, since excess oil can feed a runaway diesel. Keep the 200 hour engine oil change interval listed on page 7.
Manual Section: Operation p. 22Tractor pulls to one side on the road and front tires wear unevenly
Check tire pressures on both fronts first, then measure the track setting side to side. After any track width adjustment, torque the track rod clamp bolt to 39 N·m, the beam extension clamp bolts to 220 N·m, and the wheel nuts to 294 N·m as shown on page 35. Recheck wheel nut torque after the first field day.
Manual Section: Guide to Lift Operation p. 35Engine starts then dies or runs rough after changing the fuel filter
Check the fuel tank level, then bleed air from the system: follow page 46 for the 55-46 or pages 48 and 49 for the 65-46, which cover both CAV and Bosch pumps. Crank in short bursts and let the starter rest between attempts so the 12 V battery stays healthy; page 50 shows how to check its state of charge.
Manual Section: Servicing Schedule p. 46Loud ticking noise from the top of the engine at idle and low power
Check the valve clearances with the engine cold at the interval given in the servicing schedule on page 44: set intake to 0.25 mm and exhaust to 0.35 mm. If the clearances are correct and the ticking continues, park the tractor and have an authorized shop look at it before the noise costs you a harvest day.
Manual Section: Servicing Schedule p. 44Frequently Asked Questions
What is the torque specification for the wheel nuts on the Fiatagri 55-46 and 65-46?
The wheel nuts for these models must be torqued to 294 N·m, which is equivalent to 30 kgm or 216 ft.lb. p. 35
What are the valve clearance specifications for the Fiat 55-46 and Fiat 65-46 tractor engines?
The engine valve clearance for both intake and exhaust, whether warm or cold, is 0.25 mm (0.010 in) for the intake and 0.35 mm (0.014 in) for the exhaust. p. 44
What is the procedure for bleeding the fuel system on the 55-46 model with a CAV pump?
To bleed the CAV fuel system, back off plug A by two turns and pump lever B until fuel flows without air bubbles. Then, back off screw D and the inner screw of E, slacken three connections F, and crank the engine until fuel is free of air bubbles. Finally, retighten connections F and the inner screw of E, then start the engine and retighten screw D. p. 46
What is the total cooling system capacity for the tractor including the cab heater circuit?
The total cooling system capacity, which includes the cab heater circuit, is 14 liters or approximately 3.7 gallons. p. 73
What is the correct fan belt tension for the engine?
The fan belt should have a yield of 10 to 11 mm (0.39 to 0.44 in) when pressed with a force of 80 to 110 N (8 to 11 kg, 18 to 24 lb). p. 43
Do I get instant access to this Fiat 55-46 Operator Manual?
All 80 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Can I print a copy of this Fiat 55-46 Operator Manual for the shop?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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