2-5
Chapter 2 NAME OF PARTS
Engine Protection Devices
The engine protection devices activate an alarm when an abnormality occurs in the engine in order to protect the
engine and prevent serious problems and accidents. When a protection device is activated, stop the engine, exam-
ine the cause of the abnormality, and take corrective measures. If the cause of the problem is unknown, contact a
dealer of Mitsubishi Heavy Industries, Ltd.
Oil Pressure Switch
When the engine oil pressure decreases and reaches
to 0.3 MPa {3.1 kgf/cm
2
} [43.51 psi], the contact
becomes ON.
Fig. 2-9 Oil Pressure Switch
Oil Filter Alarm Switch
The contact will turn ON when oil filters become
clogged, the difference in pressure between inlet and
outlet of oil and reaches 0.15 MPa {1.5 kgf/cm
2
} [21.8
psi].
Fig. 2-10 Oil Filter Alarm Switch
Oil pressure
switch
Oil filter
alarm switch