Crane operation
11.1 Before operating the crane
Operating manual 3 302 736 en 11 - 11
GMK4090
xx.xx.xxxx
Seat contact
switch
This check is carried out together with the dead man's switch.
Checks during standstill
• Do not sit down on the crane cab seat.
• Do not press any dead man's switch (1).
• Move the control levers one after the other for all the crane movements
and check whether all the crane movements are switched off.
Checks during operation
– Dead man's switch
• Do not sit down on the crane cab seat.
• Press the right dead man's switch (1) and slowly lift the hook block.
• With the control lever actuated, let go of the right dead man's switch
and check whether the crane movement comes to a standstill within
about 3 seconds.
• Repeat the check with the dead man's switch on the left control lever.
– Seat contact switch
• Do not press any dead man's switch (1).
• Sit down on the crane cab seat and slowly lift the hook block.
• With the control lever actuated, stand up and check whether the crane
movement comes to a standstill within about 3 seconds.
If the dead man's switch system is not working correctly, do not start work
with the crane but notify
Manitowoc Crane Care.
G
Danger of accident if the seat contact switch is faulty
Always stand inside the crane cab when you do this check.
If you stand next to the crane cab, you may be pushed off the carrier if the
superstructure slews as a result of a faulty dead man's switch.
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