ENGINE: Performance data
 
Description
 
Fiat engines installed on 55-56/60-56/65-56/70-56 model tractors are high-speed, 4-stroke, direct injection in-line Diesel units.
 
Engine block: single iron casting, dry sleeve, crank-shaft, camshaft and valve tappet seats.
 
Cylinder heads: integral valve seats.
 
Valve gear: pushrod operated  valves, helical gear driven camshafts.
 
Crank gear: crankshaft running on 4 bearings (mods. 55-56/60-56 or 5 bearings (65-56/70-56), 3-ring light alloy piston (one compression ring and two oil scraper rings).
 
A flyweight-type dynamic balancer in the engine sump (mods. 65-56/70-56) reduces engine and engine-induced vibrations.
 
Air induction system: through oil-bath or dry air filter.
 
Fuel system: rotating distributor injection pump; 3-orifice injectors (60-56) or 4-orifice injectors (55-56/65-56/70-56).
 
Lubrication system: forced feed, gear pump, full flow oil filter and pressure relief valve.
 
Cooling system: water, centrifugal pump, wax thermostat.
 
Engine starting: 12 volt electromagnetically operated starter and thermostarter (where applicable).