1984–1987 Fiat Trattori 45-66, 55-66, 60-66, 65-66, 70-66, 80-66 Tractor Workshop Supplement Collection – Standard, V, F & LP (P/N 603.54.228.02)

This Fiat Trattori workshop supplement collection covers the 1984–1987 45-66, 55-66, 60-66, 65-66, 70-66 and 80-66 tractors, together with the listed V, F and LP variants. Print No. 603.54.228.02 brings together standard Series 66 updates and dedicated 45-66, V/F and LP sections.

• Fuel injection: Bosch VE and C.A.V. DPS pump removal, installation and engine timing procedures, plus model-specific calibration tables and engine performance data.

• Clutches and transmission: LUK and VALEO clutch servicing, adjustment tools, synchromesh transmission work, splitter assemblies, creeper gears and mechanical reverser configurations.

• Axles, brakes and PTO: Bevel-drive adjustment, differential bearing setup, NO SPIN operating checks, planetary final drives, brake controls and model-specific PTO servicing.

• Hydraulic lift: Lift removal and disassembly, control-valve inspection, position and draft control adjustment, Lift-O-Matic linkage and cab-specific control arrangements.

• Power steering: DANFOSS and ORSTA equipment identification, hydraulic bleeding, model-specific relief-valve settings and a steering-pump output curve.

• Electrical equipment: Wiring diagrams for standard, cab-equipped, V/F and LP tractors, with circuit legends, wire-color references and fuse information.

The material suits experienced tractor mechanics familiar with tractor splitting, bearing adjustment and hydraulic testing, with access to suitable lifting equipment and the specified service tools.

Series 66 Updates and Required Base Manuals

Repair scope: These supplements are intended for use with the earlier 466/566/666/766 workshop manual and the referenced Series 66 material. Those base manuals are not included. The collection does not provide a complete, self-contained internal engine overhaul manual, and several steering, hydraulic-pump and remote-valve procedures refer back to earlier publications.

65-66 component references: A dedicated guide directs engine work to the 70-66 material and most drivetrain, axle and hydraulic work to the 60-66 material. This helps a mechanic select the appropriate component procedure instead of treating all Series 66 tractors as mechanically identical.

Selected front axle procedures also apply to the earlier 466DT, 566DT, 666DT and 766DT tractors; this is limited component coverage.

Injection Pump Timing and Calibration Data

The fuel-system sections describe removal, installation and timing for Bosch VE and C.A.V. DPS injection pumps. Illustrations identify pump timing marks and the C.A.V. timing tool.

Separate calibration sheets cover the 45-66 and 65-66 pump applications. These sheets are marked provisional data, a distinction that matters when selecting bench-test information.

Clutch Adjustment, Gear Trains and Final Drives

Clutch servicing: The 45-66 material includes LUK and VALEO clutch procedures, with sectional drawings and adjustment arrangements using universal kit 293650. Transmission and splitter sections distinguish the assemblies used with creeper and mechanical reverser equipment.

Axle setup: Bevel-drive and differential sections cover bearing adjustment, gear contact and backlash. The front axle material distinguishes pinion bearing measurements with and without the oil seal, helping prevent seal drag from being mistaken for bearing resistance.

NO SPIN differential checks, planetary final-drive sections and PTO illustrations show the internal assemblies addressed by the relevant model sections. Brake coverage includes pedal and linkage adjustments; the LP material also documents final-drive removal and disassembly.

Lift Controls and Steering Equipment

Hydraulic lift: Control-valve sections identify the spool, response control, cylinder overload valve and associated seals. The adjustment procedures cover position and draft controls, Lift-O-Matic linkage and different operator-control arrangements. Tool 293846 is shown for control-valve adjustment, and assembly notes address piston-seal damage.

Steering variants: The 45-66 section identifies DANFOSS OSPC 100 and ORSTA LAG-B100 units and distinguishes them from the earlier DANFOSS OSPB 100 ON arrangement. It provides bleeding information, revised relief settings and a C18 pump output curve; full overhaul and troubleshooting procedures rely on the referenced base manual.

Wiring Diagrams and Workshop Handling

Separate wiring layouts distinguish standard tractors, cab equipment and the V/F and LP variants. Component legends, wire colors and fuse information help trace the applicable circuit without assuming that each version uses the same harness.

The mechanical sections include handling warnings for tractor splitting, suspended assemblies and final-drive removal. These jobs require appropriate supports and lifting equipment.

A Preview of Gear Clearances and Steering Pressures

For the 45-66 rear bevel drive, the normal backlash range is 0.15–0.20 mm. The LP final-drive material specifies planet-carrier end play of 0.2–0.4 mm for the 55-66LP, 60-66LP and 70-66LP applications.

The 45-66 steering section distinguishes on-tractor relief settings of 80 bar for two-wheel drive and 100 bar for the 45-66DT, measured with the engine running at approximately 1600 rpm.

Printed Contents, Diagram Detail and PDF Sections

Search, navigation and diagram detail: The technical manual text is not searchable, and the file has no embedded PDF bookmarks. Printed contents pages provide section references. Small wiring labels require zooming; some fine linework and dense terminal or wire markings remain faint or blurred when enlarged.

The collection is supplied as one printable, 239-page PDF in English, containing the following sections:

The total includes four cover pages, four foreword/imprint pages, 13 contents pages, 25 blank or section-divider pages and two notes pages.