Oil Pump; Oil Pressure Switch; Removal And Disassembly - Mitsubishi MT160 Repair Manual

ENGINE
Oil pump
The oil pump is of the trochoid type and is
located at the right side of the cylinder block,
behind the fuel injection pump. It has a build-in
check valve; this valve limits the discharge
pressure to 4 kg/cm
2
(57 psi).
When the check valve operates to relieve the
excess pressure, part of the discharged oil is
bled out into a line leading to the oil pan. The
running parts of the pump are two: inner rotor
and outer rotor.
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Spring
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Check valve --{l
Oil pressure 4!>
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Pump body
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Cover
Oil pump - Exploded view
Oil pressure switch
This switch is located at the rear right-hand
side of cylinder block, and senses the oil pressure
by means of its diaphragm to close the circuit
when the pressure falls to anywhere between
0.15 to 0.30 kg/cm
2
(2.13 to 4.27 psi.) As this
switch operates, the warning lamp lights up to
alert the operator. Whenever this lamp lights
(except when the engine is started), the engine
must be promptly shut down to search for the
cause of low oil pressure condition.
2·30
State in which pressure is
down below 0.15 to 0.30 kg/cm
2
(2.13 to 4.27 psi.) or is gone.
State of normal operation
Oil pressure switch
REMOVAL AND DISASSEMBLY
Oil filter
The filter can be loosened and removed with
bare hands. If the filter is too tight to turn, use
a filter wrench (available in the market).
Oil pump
The oil filter must be removed to take down
the oil pump. Separate the pump cover assembly
from the body and take off the gasket.
INSPECTION
Oil pump
If the clearance of the outer rotor in the body
is too large, replace the rotor assembly. To
measure this clearance, use a feeler gauge, as
shown.
Checking outer-rotor clearance in the body
If inner rotor clearance in outer rotor (as
measured in the manner shown with a feeler
gauge) is too large, replace the rotor assembly.
Checking inner-rotor clearance in the outer rotor
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