RELIEF VALVE
Relief valve prevents damage
to
the lubrication system due
to
high oil pressure. Control range of
the relief valve
is
196
to
441
KPa,
(28
to
64
psi.) When oil pressure exceeds the upper limit, the
ball
is
pushed back
by
high pressure oil and the oil escapes.
BY-PASS VALVE
Oil filter cartridge has a by-pass valve inside,
to
prevent the lack of lubrication oil
in
the engine, if
the oil filter element
is
clogged. When the pressure difference before filtering
and
after
is
more
than
98.1
kPa
(14.2
psi). the by-pass valve opens
and
lets the oil pass
to
each part of engine
without passing through the filter.
Relief valve and by-pass valve
1.
Relief valve
2. By-pass valve
3.
From pump
4.
To
rocker arm shaft and camshaft
5.
To
crankshaft
54
(3)
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