WATER
PUMP
35
Imino
(7.7
IMp.gals/min.
9.2
U.S.
gals/min) of water is forced into the crank case and cyliinder
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
2.
Mechanical Seal
3.
Water Pump Body
4.
Bearing Unit
THERMOSTAT
The thermostat maintains the cooling water at correct temperature and uses wax
pellet type
thermostat.
Wax
is enclosed in the pallet. The wax is solid at low temperatures, but turns liquid at
high temperatures, expands and opens the valve.
Flow
of
cooling
water
~_~
Temperature
sensor
of
wax
pellet
type
thermostat
(1)
(al
(bl
1.
Leak hole
7.
To
radiator
2. Water cover
3.
Spindle
8.
To
engine
9.
Pellet
4.
Pellet
10.
Wax (liquid)
5.
Valve
11.
Wax (solid)
6.
Sheet
a) At low temperature
b) At high temperature
56
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