Comprehensive Workshop Manual: Fiat Trattori 45-66, 55-66, 60-66, 65-66, 70-66, 80-66, 466, 566, 666, 756, 766 Tractor Series (1987)

Master Your Machinery: Fiat Trattori Workshop Manual (1987 Edition)

Take full control of your tractor's performance with this definitive workshop manual for Fiat Trattori's legendary Series 66 and its predecessors. This 1987 revised edition is not just a collection of diagrams; it is a comprehensive technical guide designed for the serious owner and professional mechanic. Covering the transition from the classic 466–766 line to the improved Series 66, this manual provides the specific data you need to maintain, troubleshoot, and overhaul your equipment to factory standards.

This manual is specifically engineered for the following model combinations:

• 45-66 / 45-66 DT
• 55-66 / 55-66 DT (Supersedes Model 466)
• 60-66 / 60-66 DT (Supersedes Model 566)
• 65-66 / 65-66 DT (Supersedes Model 566)
• 70-66 / 70-66 DT (Supersedes Model 666)
• 80-66 / 80-66 DT (Supersedes Model 766)
• 466, 566, 666, 756, 766

Expert-Level Technical Insights

Engine & Fuel Systems

Get under the hood with detailed specifications for the FIAT 8000 series engines. This manual includes full calibration data for both BOSCH (VE type) and C.A.V. (DPS type) injection pumps. Whether you are adjusting the 3-cylinder naturally aspirated engine of the 45-66 or the more powerful 4-cylinder units in the 80-66, you will find precise timing marks and delivery values (e.g., pump timing at 6° ± 1° B.T.D.C for specific Bosch pumps).

Advanced Power Train & 4WD

Maximize your pulling power with complete sections on the constant mesh and full synchromesh transmissions. This guide covers the 12-speed and 20-speed versions, including the mechanical reverser and creeper gear setups. For 4WD (DT) models, the manual provides critical shim thickness determination for the bevel pinion and differential adjustment using universal gauges like tool 293510.

Hydraulic Lift & "Lift-O-Matic"

Optimize your implement handling with a deep dive into the hydraulic systems. Learn how to calibrate the "Lift-O-Matic" device for automatic return to working depth and how to perform draught control adjustments with millimeter precision. The manual specifies cylinder safety valve settings, noting the pressure change from 225-235 bar on older models to 210-215 bar on the Series 66.

Specific Service Data & Serial Numbers

For accurate parts identification and technical compliance, this manual references key Engineering and Marketing codes:

• Model 65-66: Engineering Code 671.600.000 / 671.627.000 (4WD)
• Model 45-66: Engineering Code 674.100.000 / 674.127.000 (4WD)
• Injection Pump IDs: BOSCH VE 4/11F or C.A.V. DPS 8520A/8522A series.
• Reference Numbers: Includes Print No. 603.54.228.02-X-1987 for technical authenticity.

Comprehensive Workshop Coverage

• Lubrication & Fluids: Accurate capacities for Oliofiat AMBRA SUPER and TUTELA MULTI F (e.g., 46.7 liters for Series 66 transmission/lift oil).
• Steering Systems: Service instructions for both mechanical recirculating ball and hydrostatic power steering (Danfoss/Orsta units).
• Brake Overhaul: Step-by-step disassembly for oil-bath disc brakes and parking brake adjustments.
• Electrical Diagnostics: Complete wiring diagrams, fuse ratings (up to 8 fuses), and alternator/starter specifications (Marelli, Bosch, or Lucas).
• Specialized Tools: Reference guide for over 50 specific Fiat service tools required for professional-grade repairs.

Whether you are performing a simple oil change or a complete split for a VALEO or LUK 10" clutch replacement, this manual delivers the exact torque data and assembly clearances needed to keep your Fiat Trattori tractor running for decades.