Service manual

G420F(FE) Service Manual Chapter 3. Engine Mechanical System 77
Oil Pressure Switch
Oil pressure switch is located on the front right side
of the engine and if oil pressure in the lubrication
system drops less than 0.29kg/cm2, the oil pressure
warning lamp illuminates. Hexagonal width of this
switch is 24mm.
Removal and Installation
After applying sealant to the spiral portion, install the
oil pres-sure switch.
NOTE: Do not tighten the oil pressure switch too
tight.
Oil pressure switch 1.3 ~ 1.5㎏∙m
Inspection
1. Using an ohmmeter, measure an electric current
and re-place the oil pressure switch if an electric
current is not detected.
2. When pressing it with a thin stick, if an electric
current is measured between terminal and body,
replace the oil pres-sure switch.
3. When applying a negative pressure of 0.3kg/cm2
through the oil hole, it an electric current is not
measured, the switch is normal. If the switch is not
normal, check for air leak. If air is leaked, replace
the switch because it means damage of the
diaphragm.