Inspecting Oil Pressure Switch - Mitsubishi Heavy Industries SL Series Service Manual

2.3 Inspecting oil pressure switch

(1) Connect a tester (ohm range) between the terminal and
body to check for continuity. The switch is normal if
there is continuity between them. If there is no
continuity, replace the switch.
(2) Insert a thin rod from the oil hole and lightly push it.
The switch is normal if there is no continuity between
them. If there is continuity when the rod is pushed in,
replace the switch.
(3) When air pressure of 0.05 MPa {0.5 kgf/cm²} [7.1 psi]
is applied from the oil hole and there is no continuity,
the switch is normal. Also check for air leaks. If there
are air leaks, the diaphragm is damaged. Replace the
switch.
LUBRICATION SYSTEM
Check for continuity.
Inspecting oil pressure switch (1)
Thin rod
Inspecting oil pressure switch (2)
9-5