Fiat Trattori 580-680 DT Workshop Manual - 1960–1970 - (P/N 603.54.202)

The 192-page official OEM publication (P/N 603.54.202, September 1979 revision) serves as the primary technical reference for the 1960–1970 Fiat Trattori 580 and 680 series. It extensively documents the complete evolution of the powertrain and engine across all configurations, including the 580 DT and 680 DT four-wheel-drive variants.

Mechanics will find 47 detailed cross-section diagrams, 16 comprehensive torque-specification tables, and 12 exploded-view mechanical system overviews inside the documentation. Always follow standard workshop safety protocols when handling heavy tractor components, as incorrect lifting procedures or improper torque application can lead to severe injury or catastrophic mechanical failure.

Document Structure and Coverage

This manual provides exact factory specifications regarding mechanical overhauls and maintenance procedures. The sections follow a logical progression through the tractor's systems, starting with general instructions on critical baseline procedures like shim adjustments, correctly seating rotary shaft seals, and selecting the right sealing compounds.

Moving into the core components, the engine segment breaks down block specifications, cylinder head geometry, and precise valve timing thresholds. The powertrain chapters heavily detail the clutch packs, transmission gear sets, and differential preload settings. Further sections map out the steering mechanisms, front axle geometry, hydraulic lift units, and the complete electrical system wiring routes. This thorough breakdown allows technicians to quickly identify sub-assemblies during bench rebuilds.

Specification and Technical Preview

Rather than generalized guidance, this manual supplies exact hard data for both 3-cylinder and 4-cylinder layouts. You get precise bore and stroke dimensions alongside factory valve clearance thresholds.

Critical fastener torque values are laid out clearly. For instance, cylinder head bolts require 147 Nm (108 ft lb), matching the main bearing caps at 147 Nm (108 ft lb). For fuel delivery, the manual provides calibration data for both Bosch and C.A.V. injection pumps to ensure accurate tuning. Engine oil pump lubrication pressures must measure between 2.9 and 3.9 bar (42.6 to 56.9 psi). Additionally, final drive planetary gear reduction ratios are confirmed at 5.785:1 for both the 580 and 680 models.