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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. Protection devices installed on the engine and their types (setting values)
and shapes vary depending on the engine specifications.
Oil filter alarm switch
The oil filter alarm switch generates an alarm when oil
filters become clogged, the difference in pressure
between inlet and outlet of oil and reaches the speci-
fied value.
Fig. 2-8 Oil filter alarm switch
Air cleaner indicator
The air cleaner indicator alarms with its red signal
when air cleaner elements become clogged, the differ-
ence in pressure between front air cleaner and rear air
cleaner, and reaches the specified value. The air
cleaner indicator indicates the signal only, and does
not generate an alarm. Therefore, the periodic visually
inspection is needed.
Press the reset button on the top of air cleaner indica-
tor and restore the signal after cleaned the air cleaner
indicator or replaced with a new one.
Fig. 2-9 Air cleaner indicator
Oil filter alarm switch
Reset button
Signal
(red)
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