Maeda CC423S-1, Руководство по эксплуатации

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4. MOMENT LIMITER OPERATION AND CANCELLING
(RECOVERY)
For moment limiter operation and cancelling (recovery), carefully check the contents of “Operation 2.3.3
Moment Limiter Operation And Cancelling (Recovery)”.
[1] PROHIBITED OPERATIONS AFTER AUTOMATIC STOP
After an automatic stop occurs due to overload during searcher hook operation, the following
crane operations are prohibited.
Do not attempt to force operation, as this is extremely dangerous and may overturn the
machine or break the boom.
• Boom lowering operation • Boom hoisting operation • Boom extending operation
[2] RECOVERY OPERATION FROM AUTOMATIC STOP
When an automatic stop occurs, recovery cannot be performed unless you lower the load
capacity ratio to the safe region of less than 90% (tri-colour revolving working status lamp:
green).
However, in the specific case that the boom is fully retracted, recovery is possible with a load
capacity ratio less than 95%. This is a recovery condition only when the searcher hook is being
used.
For searcher hook operation with a load capacity ratio of 90% or more, be sure to slow down
the engine speed, and perform operation carefully.
In the case of an automatic stop, retract the boom to within
the region of safety, then lower the load with the boom.
In the case of an automatic stop, when hoisting of the boom
is unavoidable, the boom hoist operation is possible only
while keeping the maintenance switch in the “ON” position.
To return to the “OFF” position, also return the boom
hoisting lever.
Only use this switch when an automatic stop 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 accidents such as the machine being
damaged or overturning.
NOTES
While the maintenance switch is “ON”, the machine operates
as follows.
•
The engine speed decreases.
•
The continuous buzzer tone sounds.
•
The tri-colour revolving working status lamp illuminates in
red.