Fiat's own 84-page operator manual, print number 603.64.248.00R, takes seven 86 series tractors from first start to winter storage: the 50-86, 55-86, 60-86 and 70-86, plus the 50-86O, 55-86O and 70-86V orchard and vineyard versions. Controls and instruments fill the biggest stretch of the book, walking you across the instrument panel, the transmission and splitter, the PTO, the differential lock, and the hydraulic lift right through implement attachment and remote valves. Shorter chapters handle the maintenance schedule, fuel system bleeding, fuses and battery, ballasting, track adjustment, and the DT, creeper, reverser and No Spin variants. Change engine oil at 200 hours, and torque wheel nuts to 216 Nm (160 ft lb) after you adjust track. A guessed wheel torque works loose halfway through baling. This bookmarked, text-searchable PDF rides along to whichever field the tractor quit in.
What's Inside This Fiat 50-86–70-86 Series Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Work Safely-Always | 4-5 | Safety Rules, Warning Signs, Caution, Danger |
| Service | 6-8 | Dealer Network, Skilled Servicemen, Tractor Operation, Tractor Use |
| Tractor Identification Data | 9 | Tractor Data Plate, Engine Type, Engine Number, Frame Type, Frame Number |
| Safety Precautions | 10-16 | General Safety, Asbestos Powder, Tractor Use, First Aid Kit, Moving Parts, PTO Shaft Shielding |
| Controls and Instruments | 17-49 | Instrument Panel, Control Board, Operation, Starting and Stopping, Transmission and Splitter, Power Take-Off, Differential Lock, Hydraulic Lift |
| Maintenance | 50-57 | Maintenance Schedule, Fuel System Bleeding, Cooling System, Panelling Maintenance |
| Electrical System | 58-60 | Battery, Fuses, Headlamp Alignment |
| Specifications | 61-67 | Standard Tire Matching, Weights, Dimensions, Engine Make, Max Output, Full Load Speed |
| Dt Tractors | 68-72 | Front Wheel Drive Operation, Front Track Adjustment |
| Speed Version | 73-74 | Pinion Drive, Creeper Gear, Transmission, Forward Gears, Reverse Ratios |
| Reverser Version | 75-76 | Reverser-Splitter Unit, Transmission, Forward Speeds, Reverse Speeds, Reverser Lever |
| No Spin Version | 77-78 | Front Axle, Ring Gear Housing, Splined Sleeves, Dog Clutch, Double Joint |
| Dt Tractors with Self-Locking Differential (Lim-Slip) | 79 | |
| Variants and Accessories | 80 | Mechanical Reverser, Creeper Gear, Thermostarter, No-Spin Differential, Ballast Weights |
| Tractor Storage | 81-84 | Engine Oil, Cooling System, Fuel Tank, Battery, Piston Rods, Tires |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Clamp bolts 1 and 2 torque | 220 Nm, 22.5 kgm or 163 ft lb | p. 44 |
| Starter motor output | 3 kW (3-cylinder models), 3.5 kW (4-cylinder models) | p. 67 |
| Alternator rated output | 400 W | p. 67 |
| Engine Oil Change Interval | 200 hours | p. 7 |
| Front Axle Ballast Weight | 162 kg | p. 41 |
| Wheel Nut Torque | 216 Nm | p. 44 |
| Rim-to-hub Nut Torque | 245 Nm | p. 45 |
| Hydraulic Pump Relief Valve Setting | 186 bar | p. 65 |
| Steering Relief Valve Setting | 70 bar | p. 66 |
| Battery Capacity | 90/100 Ah | p. 67 |
Fiat 50-86–70-86 Series Common Problems This Manual Covers
Fiat 50-86 engine cranks slowly or will not start on frosty mornings after sitting overnight
Check battery charge before repeated cranking; the sealed 12 V battery is rated at 90/100 Ah, listed in the specifications on page 67. Follow the cold starting procedure in the operating instructions on page 22, using the thermostarter where fitted. Limit each attempt to short bursts and let the starter rest between tries.
Manual Section: Engine Starting Troubleshooting p. 22Hydraulic lift raises the implement slowly or drops under load, draft control not responding
Check hydraulic oil level on level ground before every use and top up per the maintenance schedule on page 50. Verify the draft and position control levers are set correctly for the implement; combined control needs both levers matched. If the lift stays weak, have your dealer test the pump relief valve, factory set at 186 bar per page 65.
Manual Section: Hydraulic System TroubleshootingBattery goes flat overnight or the charge warning light stays on at working speed
Check battery terminals for corrosion and verify the charge level using the electrical system section on page 58, which also identifies each fuse. Verify the alternator, rated at 400 W per the specifications on page 67, is charging at governed engine speed. If the warning light stays lit, check drive belt tension before replacing parts.
Manual Section: Electrical System Troubleshooting p. 58Wheel wobble or clunking felt at road speed after adjusting the wheel track
Check every wheel fastener after any track adjustment and again after the first few hours of work. Torque wheel nuts to 216 Nm (160 ft lb) as shown on page 44, and rim-to-hub nuts to 245 Nm, listed on page 45. Recheck daily until the nuts stop taking movement, then return to the normal schedule.
Manual Section: Controls and Instruments p. 44Front end feels light and steering wanders with a heavy mounted implement raised
Check that front ballast is fitted before working with a heavy rear mounted implement; the front axle ballast weighs 162 kg, shown on page 41. Lower the implement and recheck steering to confirm weight transfer is the cause. Match ballast to the implement so you can keep moving when the field window is short.
Manual Section: Controls and Instruments p. 41Frequently Asked Questions
What is the engine valve cold clearance for the Fiat 86 series tractors?
The engine valve cold clearance for both intake and exhaust valves is 0.30 mm (0.012 in). p. 51
What is the tightening torque for the splined extension nuts on the PTO shaft of a Fiat 86 series tractor?
The tightening torque for the nuts fastening the splined extensions to the shaft is 162 Nm (16.5 kgm or 110 ft.lb). p. 28
What is the recommended engine oil change interval for a Fiat 86 series tractor?
The tractor oil change interval is every 200 hours of operation. p. 7
What is the fuel injector release pressure for the Bosch pump on a Fiat 86 series tractor?
The fuel injector release pressure is 230 to 238 bar (3336 to 3452 psi) for the Bosch pump and 260 to 268 bar (3766 to 3880 psi) for the CAV pump. p. 51
How do I bleed the fuel system on a CAV pump engine?
To bleed the CAV pump, back off plug A two turns and pump lever B until fuel is free of air bubbles, then retighten. Next, back off screw C and the screw inside hexagon D two turns, crank the engine until fuel is free of air, and retighten the screw inside hexagon D. p. 55
What exactly do I receive with this Fiat 50-86 Operator Manual?
This is a 84-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I free to print this Fiat 50-86 Operator Manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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