OIL
SWITCH
Oil switch
is
provided
on
the way for the oil pressure. If the oil pressure is
proper,
it
is
switched
off, if oil pressure
falls below
49.0
kPa
(7.1
psi), the oil warning lamp
etc.
will light, warning the
operator.
In
this
case,
stop the engine immediately and check the cause of the pressure drop.
Oil
switch
(1)
1. When
oil
pressure
is
proper
2. When oil pressure falls
3. Screw
4. Terminal
5. Spring plate
6.
Insulator
7.
Spring retainer
OIL PUMP
(1)
_'t=l.,jj..-
(8)
(11)
(2)
8. Rubber packing
9.
Oil seat
10. Contact rivet
11. Contact
12. Lamp
13. Battery
The oil pump
is
of rotor type and works smoothly and noiselessly.
An
inner and outer rotor turn
inside a housing.
In
operation, the inner rotor is driven inside the outer
rotor.
The inner rotor
has
one less lobe than the outer
rotor,
so
that only one lobe
is
in
full engagement with the outer rotor
at
anyone
time. This allows the other lobes
to
slide over the outer lobes, making a seal
to
prevent
back-up of
oil.
As the lobes slide up and over the lobes
on
the outer
rotor,
oil is drawn in. As the lobes fall into
the ring's cavities, oil
is
squeezed out.
1.
Draw in 1
Rotor-type
pump
in operation
2. Draw in 2
3.
Draw in 3
4.
Squeeze
out
5.
Inlet
6.
Outlet
7.
Inner rotor
8.
Outer rotor
35
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