A slipping PTO clutch or a lift that won't hold the implement mid-season is the failure this book was written for. This Fiat 566 shop manual PDF runs 252 factory pages under OEM number 603.54.228.00 and covers eight variants: the 466, 566, 666 and 766, each in standard and DT form. Power train work takes the biggest share of the book, from clutches, splitter, creeper and reverser through the bevel drive, final drives and PTO, backed by gear-path schematics. The hydraulic schematics show the lift pump, remote control valves and trailer brake valve, and the electrical section ends with a full wiring diagram. Set bevel drive backlash at 0.18 to 0.23 mm and hold main bearing clearance between 0.063 and 0.096 mm. Invented torque or pressure figures crack castings before harvest. Print the chapter, let it pick up grease on the bench, and have your tractor back in the field while the weather holds.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| General | 3-10 | General Instructions, Safety Precautions, Spare Parts |
| Specification | 11-24 | Identification Data - Weights, Power Train - Brakes - Steering - Front Axle - Front Wheel Drive - Rear Wheels - Power Take-Off |
| Engine | 25-74 | Engine Block, Cylinder Head, Valve Gear, Crank Gear, Lubrication System, Cooling System, Performance Data |
| Power Train | 75-136 | Clutches, Transmission and Splitter, Creeper and Reverser, Bevel Drive and Differential, Brakes, Final Drives, Power Take-Off |
| Front Axle - Steering | 137-160 | Front Axle, Manual Steering, Power Steering, Steering Linkage |
| Front Wheel Drive | 161-182 | Front Axle, Drive Shafts, Axle Drive |
| Hydraulic Lift Unit | 183-228 | Lift, Lift Pump, Implement Attachment, Remote Control Valves, Trailer Brake Remote Control Valve |
| Electrical System | 229-246 | Charging System, Starters, Battery, Fuses, Lighting, Wiring Diagram |
| Service Tools | 247-252 | Engine Tools, Fuel System Tools, Power Train Tools, Hydraulic Lift Tools |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| PTO clutch control sleeve working clearance (LUK 11"/11") | 0.072 to 0.205 mm (0.0028 to 0.0080 in) | p. 75 |
| Plate thickness Transmission (LUK 11"/11", Models 466, 566) | 8.9 to 9.5 mm (0.350 to 0.374 in) | p. 75 |
| Main Bearing Clearance | 0.063 to 0.096 mm | p. 26 |
| Transmission Clutch Control Sleeve Working Clearance | 0.050 to 0.151 mm | p. 75 |
| Bevel Drive Backlash | 0.18 to 0.23 mm | p. 78 |
| Lift Relief Valve Crack-off Setting | 186 to 191 bar | p. 183 |
| Lift Pump Gear End Float | 0.090 to 0.160 mm | p. 185 |
| Alternator Voltage Setting (Bosch) | 13.7 to 14.5 V | p. 229 |
