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)
(11)
(2)
1. When oil pressure
is
proper
8.
Rubber packing
2. When oil pressure falls
9. Oil seat
3. Screw
10. Contact rivet
4. Terminal
11.
Contact
5. Spring plate 12. Lamp
6. Insulator
13.
Battery
7.
Spring retainer
OIL PUMP
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
(5)
(6)
(7)
55
(8)
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