Crane operation
11.1 Before operating the crane
11 - 10 3 302 736 en Operating manual
GMK4090
xx.xx.xxxx
Lifting limit switch • Raise the main boom until the hook block is lifted off the ground.
• Slowly perform the Raise movement until the hook block lifts the lifting
limit switch weight.
• Now check whether the Raise movement is switched off and lamp (1)
lights up
• Check whether the Lower and Extend movements are also switched off.
The lifting limit switch is working correctly at this point in time if the lamp
(1) lights up and the
Raise, Lower and Extend movements are switched off.
If the lift limit switch is not working correctly, do not start work with the
crane but notify
Manitowoc Crane Care.
Emergency stop
switch
• Set down the load and let go of both control levers.
• Press the emergency stop switch (3) so that
it engages.
• Check whether the engine stops.
• Turn the emergency stop switch until it dis-
engages again.
• Open the air intake inhibitor if required;
à Air intake inhibitor, p. 4 - 21.
• Repeat the checks with the emergency stop
switches (1) and (2).
If the emergency off switch is not working correctly, do not start work with
the crane but notify
Manitowoc Crane Care.
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