M A E D A Crawler Crane 4.3 MOMENT LIMITER (OVERLOAD PREVENTION DEVICE)
5/2020 CC1908S-1 4-25
[When recovering by boom hoisting
operation]
In the case of overload, when hoisting of the boom
is unavoidable, the boom hoist operation is
possible only while keeping the maintenance
switch in the “ON” position. When you switch the
maintenance switch back to the “OFF” position,
also return the boom hoisting lever to the neutral
position.
DANGER
Only use this switch when overload has
occurred through entry into the overload
region while lowering or extending the boom.
Do not use under normal conditions or when
lifting clear from the ground.
If you use this switch when lifting from the
ground, there is a risk of serious accident
such as the machine toppling over and
becoming damaged.
While the maintenance switch is “ON”, the
machine operates as follows.
• The engine speed decreases.
• The continuous buzzer tone sounds.
• The working status lamp illuminates in red.
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