Pro.Mecc Freccia Maintenance Manual page 15

Maintenance Manual V001
FRECCIA
ENGINE LUBRICATION SYSTEM
The engine lubrication system limits the wear and tear of the engine elements and ensures their
partial cooling and evacuate the rejects of wear and tear.
ROTAX 912 UL(S) engine is equipped with a dry sump forced system including a main oil pump
with an integrated pressure regulator (1) and a oil-pressure sensor (2). The integrated oil pump is
activated through the camshaft.
Through the depressurizing created by the pump (3), the engine oil is driven from the tank (4)
through the oil cooler (5), through the filter (6) to the lubrication points in the engine.
The oil in excess overflowing from the lubrication points accumulates in the bottom of crankcase
and it's pushed back, to the tank by blow's gas.
The oil circuit is vented by a bore on the oil tank.
The oil-temperature sensor (8) is located on the oil pump housing.
ENGINE LUBRICATION SYSTEM
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ENGINE COOLING SYSTEM
The function of ROTAX 912 UL(S) cooling system is to guarantee liquid cooling for cylinders heads
and air cooling for cylinders. Cylinders heads cooling system is at closed circuit with an expansion
tank.
Cooling fluid is pushed by the pump (set in motion through camshaft) from radiator to cylinders
heads. From the top of cylinders heads, cooling fluid reaches the expansion tank (1). Since, usu-
ally, the radiator position (2) is lower than the engine one, the expansion tank located above the
engine allows the cooling fluid to flow. Expansion tank, shut with a pressure cap (3) provided with
overpressure valve and return valve, opens and cooling fluid runs through an atmospheric pressu-
re tank to a transparent overpressure container (4). When cooling temperature begins to decrease,
fluid is sucked down to cooling circuit.
Cooling fluid temperatures are measured by sensors installed on cylinders heads 2 and 3.
Temperature readings are taken by measuring the hottest point of cylinder head, according to
engine installation.
COOLING SYSTEM
Coolant Fluid: see Engine Operator Manual.
FUEL SYSTEM
Freccia in basic version is equipped of a fuel tank installed inside right wing, having capacity of 50
liters. The drenable quantity of fuel is 48.5 liters.
It is available as option the second fuel tank that can be installed on the left wing.
System schema is represented below.
Maintenance Manual V001
FRECCIA
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