2-20
DS35-W00 May. 2007
CLUTCHCLUTCH
CLUTCHCLUTCH
CLUTCH
TRANSMISSIONTRANSMISSION
TRANSMISSIONTRANSMISSION
TRANSMISSION
ENGINEENGINE
ENGINEENGINE
ENGINE
HSTHST
HSTHST
HST
FRONT AXLEFRONT AXLE
FRONT AXLEFRONT AXLE
FRONT AXLE
STEERINGSTEERING
STEERINGSTEERING
STEERING
BARKEBARKE
BARKEBARKE
BARKE
ELECTRICELECTRIC
ELECTRICELECTRIC
ELECTRIC
INDEXINDEX
INDEXINDEX
INDEX
HYDRAULICHYDRAULIC
HYDRAULICHYDRAULIC
HYDRAULIC
GENERALGENERAL
GENERALGENERAL
GENERAL
REAR AXLEREAR AXLE
REAR AXLEREAR AXLE
REAR AXLE
CK22/CK22H
(1) Radiator (4) Cylinder block
(2) Suction fan (5) Cylinder head
(3) Water pump (6) Thermostat
3.3.1 WATER PUMP
35 /min. (7.7 lmp.gals/min, 9.2 U.S gals/min) of water
is forced into the crankcase and cylinder head to cool
them. The impeller, of backward type, is bent as far as
possible from the center, in the opposite direction to
rotation; the bearing unit prevents cooling water from
entering by a special mechanical seal.
(1) Water pump impeller (3) Water pump body
(2) Mechanical seal (4) Bearing unit
196W225B
196W226A
3.3 COOLING SYSTEM
The cooling system consists of a radiator, centrifugal
water pump, suction fan and thermostat.
The water is cooled through the radiator core, and the
fan set behind the radiator pulls cooling air through the
core to improve cooling.
The pump sucks the cooled water, forces it into the
cylinder block and draw out the hot water. Then the
cooling is repeated. Furthermore, to control tempera-
ture of water, a thermostat is provided on the way. When
the thermostat opens, the water moves directly to
radiator, but when it closes, the water moves toward
the water pump through the by-pass between thermo-
stat and water pump.
The opening temperature of thermostat is about 83°C
(180°F).
ENGINE - OPERATING PRINCIPLE
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