1-M12
BX1800 · BX2200, WSM
ENGINE
3. COOLING SYSTEM
W1016367
The cooling system consists of a radiator (1), a centrifugal water pump (2), a cooling fan (3) and a thermostat (4).
The water is cooled as it flows through the radiator core, and the cooling air through the radiator core by cooling fan.
The water pump receives water from the radiator or from the cylinder head and force it into the cylinder block.
The thermostat opens or closes according to the water temperature. When the water temperature is high, the
thermostat opens to allow the water to flow form the cylinder head to the radiator. When the water temperature is low,
the thermostat close to flow the water only to the water pump.
The opening temperature of the thermostat is approx. 82 °C (180 °F).
[1] WATER PUMP
The water pump is driven with the fan drive pulley,
which is on the water pump shaft and driven by the
crankshaft with a belt.
The rotating impeller (4) in the water pump receives
cool water from the bottom of the radiator and the water
jacket of cylinder head, and sends it into the water jacket
in the cylinder block.
The mechanical seal (3) prevents the water from
entering the bearing (1).
W1016526
(1) Radiator
(2) Water Pump
(3) Cooling Fan
(4) Thermostat
(5) Cylinder Head Water Jacket
(6) Cylinder Block Water Jacket
(1) Bearing Unit
(2) Water Pump Body
(3) Mechanical Seal
(4) Water Pump Impeller
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