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This 507-page Fiat 115-90, 130-90 Turbo, 140-90 Turbo, 160-90 Turbo, 180-90 Turbo Workshop Manual (OEM #603.54.252.00) covers every system on these tractors, from the engine block down to final drives. Open it and you get full wiring diagrams for chasing electrical faults, hydraulic schematics for the lift pump and auxiliary cylinder circuits, and a dedicated troubleshooting chart for the power steering system. There's a complete exploded-view section for the power train, covering the clutch, transmission and splitter, power shift transmission, rear bevel drive, and final drives, plus fluid capacities and torque specs pulled straight from Fiat's own service data. Check your steering knuckle clearances and confirm hydraulic pump pressure before you button the front axle back up. Your tractor won't fix itself off a forum thread. This PDF keeps its bookmarks intact and opens on laptop, tablet, or phone, so you can carry the whole workshop manual straight out to the tractor and start turning wrenches.
What's Inside This Fiat 115-90 to 180-90 Turbo Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 7-11 | Safety Precautions |
| Specification | 12-31 | Identification Data - Weights, Power Train - Brakes - Steering, Front Axle - Front Wheel Drive - Rear Wheels - Power Take-Off - Lift |
| Engine | 32-123 | Engine Block, Cylinder Head, Crank Gear, Valve Gear, Fuel System, Lubrication System, Cooling System |
| Power Train | 124-317 | Clutch, Transmission and Splitter, Power Shift Transmission, Rear Bevel Drive and Differential, Brakes, Final Drives, Power Take-Off |
| Front Axle - Steering | 318-337 | Front Axle, Power Steering, Steering Knuckle Service, Hydraulic Cylinder Service, Hydraulic Pump Service, Trouble-Shooting Chart |
| Front Wheel Drive | 338-399 | Live Front Axle, Axle Drive, Drive Shafts, Final Drive, Differential Hydraulic Lock Clutch, No-Spin Differential |
| Hydraulic Lift Unit | 400-479 | Lift, Lift Pump, Auxiliary Cylinder |
| Electrical System | 480-497 | - |
| Service Tools | 498-507 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 115-90 | ||
| Engine Max. horsepower | 84.6 kW (115 HP) | p. 13 |
| Engine Oil Pressure at Governed Speed | 2.9 to 3.9 bar | p. 15 |
| Clutch Plate Thickness (VALEO 12"/12") | 9.7 to 10.2 mm | p. 124 |
| 180-90 Turbo | ||
| Engine Max. horsepower | 132.4 kW (180 HP) | p. 13 |
| 160-90 Turbo & 180-90 Turbo | ||
| Engine Oil Pressure at Governed Speed | 4.7 to 5.1 bar | p. 15 |
| Hydraulic Lift Unit Max. Lift Capacity | 5982 daN (6100 kg) | p. 400 |
| 115-90, 130-90 Turbo | ||
| Sump and Filter Oil Capacity | 15.2 litres | p. 29 |
| 140-90 Turbo, 160-90 Turbo, 180-90 Turbo | ||
| Sump and Filter Oil Capacity | 18.3 litres | p. 30 |
| All Models | ||
| Front Axle Toe-in | 0 to 5 mm | p. 318 |
| Power Steering Relief Valve Crack-off Setting | 125 bar | p. 319 |
| Alternator Rated Output | 14V-65A | p. 480 |
| 115-90, 130-90 Turbo, 140-90 Turbo | ||
| Battery Nominal Capacity (at 20 hour rate) | 132 Ah | p. 480 |
Fiat 115-90 to 180-90 Turbo Common Problems This Manual Covers
Fiat 115-90 engine and gearbox oil overheating despite normal ambient temperatures
Pull the double heat exchanger and inspect both oil-side and coolant-side passages for scale and sludge buildup. Flush with approved cleaning solvent and blow dry with compressed air. Check fluid capacities on page 29 before refilling, and confirm coolant thermostat opens fully before returning the tractor to service.
Manual Section: Engine: Lubrication and Cooling System p. 29Turbocharger whines under load and engine feels down on power
Follow the turbocharger troubleshooting procedure to isolate noise, low power, low boost, or smoky exhaust. Check the intake ducting and clamps for leaks first, then verify boost pressure at rated RPM matches spec. Remove the turbo if the shaft shows play or the compressor wheel is nicked, and inspect the oil feed line for restriction before reinstalling.
Manual Section: Engine: Troubleshooting ProceduresHydraulic three point hitch lifts slow or won't hold a load under work
Work through the hydraulic lift unit troubleshooting chart to narrow down erratic movement, no-hold, or weak lifting power. Check the lift pump output flow and inspect the relief valve for a cracked or worn seat. Test control valve spool for scoring, and change the hydraulic filter if fluid is visibly contaminated before bleeding the system.
Manual Section: Hydraulic Lift Unit: Trouble-ShootingFront wheel drive won't engage or slips badly when pulling under load
Check the front drive engagement linkage and solenoid for full travel before pulling the axle housing apart. Drain the front axle housing and inspect the clutch pack plates for glazing or excessive wear, replacing any warped discs as a set. Adjust king pin bearing pre-load per the procedure if play is found at the steering knuckle during teardown.
Manual Section: Front Wheel Drive: Axle DrivePower steering goes heavy or loses assist intermittently while turning
Run through the power steering troubleshooting chart on pages 332 and 334 to separate leaking control unit symptoms from pump-side faults. Check reservoir fluid level and top off per capacities on page 29, then inspect the control unit housing and hose fittings for external leakage. Bleed air from the system by cycling the wheel lock to lock with the engine running at idle.
Manual Section: Front Axle - Steering: Power Steering p. 332Power shift transmission clutches slip or shift harshly between gears
Perform the power shift hydraulic pressure tests on pages 217 through 220 to check clutches A, B, C, D and the band brake individually. Calibrate the pressure relief valve to the specified setting if readings fall outside range. Inspect the transmission oil filter for debris and change it before retesting, since contaminated fluid is the most common cause of erratic shift feel.
Manual Section: Power Train: Power Shift TransmissionFrequently Asked Questions
What are the torque specifications for the engine head bolts on Fiat 130-90 Turbo?
For the Fiat 130-90 Turbo, the cylinder head capscrews are tightened in four successive stages. The initial pre-torque is 60 Nm (6.1 kgm or 442.56 ft.lb), followed by a pre-torque check, and then two successive 90° angle tightenings using a graduated sector tool.
What are the torque specifications for the rear axle bolts on Fiat 180-90 Turbo?
For the Fiat 180-90 Turbo, the nut retaining the final drive housing (C1) requires a torque of 196 Nm (20 kgm or 144 ft.lb). The screw for the hub (C7) should be tightened to 294 Nm (30 kgm or 217 ft.lb).
What are the replacement specifications for Hydraulic lift unit seals and pump?
For the Hydraulic Lift Unit, if pump parts are defective on 160-90 Turbo and 180-90 Turbo tractors, the pump must be replaced as a whole. For seals, the manual states to "always scrap and replace the seals" if inefficient, but does not provide specific replacement dimensions or part numbers for the seals themselves.
What is the maximum wear clearance for the piston pin in the piston for Fiat 115-90?
The maximum wear clearance for the piston pin in the piston for the Fiat 115-90 is specified as 0.2 mm (0.008 in). This value is critical for maintaining engine performance and longevity.
Is this Fiat 115-90 & variants Workshop Manual a digital download?
You get a 507-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this Fiat 115-90 & variants Workshop Manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there wiring harness diagrams in this Fiat 115-90 & variants manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Fiat 115-90 & variants.
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