DIESEL
ENGINE
05
SERIES
WSM,
01640
[5]
RADIATOR CAP
d
117~0F10230
\o
The radiator cap is for sustaining the internal
pressure
of
the cooling system at the specified level
88
kPa
(0.9
kgf/cm2,
13
psi) when the engine is
in
operation. The cap consists
of
a pressure valve
(1)
a
vacuum valve
(2),
valve springs, gasket, etc.
Cooling water is pressurized by thermal expansion of
steam, and as its boiling temperature rises, generation of
air bubbles will be suppressed. (Air bubbles in cooling
water lowers the cooling effect.)
(1)
Pressure Valve
(A)
When radiator internal
(2)
Vacuum Valve
pressure
is
high
(B)
When radiator Internal
pressure is negative
11
79OM10201
M-21
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