Hitachi ZAXIS 120-3 class Operator's Manual page 79

Hydraulic
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Overload Alarm
(Only machines equipped with optional parts)
IMPORTANT: When using overload alarm, consult your
nearest Hitachi dealer.
When the overload alarm switch is turned ON, the system
measures load of the suspended load from bottom pressure of
the boom cylinder. An alarm message is displayed and buzzer
is rung, if overload is detected.
OPERATOR'S STATION
1-30
Basic Screen
Overload Alarm Switch
T1V1-05-01-128
T1V1-05-02-004

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