Manitowoc Grove GMK 4100L-1, Operating Manual

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Rigging work
12.3 Rigging work after driving with a dolly
Operating manual 3 302 690 en 12 - 19
GMK4100L-1
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12.3 Rigging work after driving with a dolly
If the main boom is resting on a dolly whilst the truck crane is being driven,
you must perform the following before working with the crane:
– Switch off the slewing gear freewheel;
à
p. 12 - 20
– Switch off the boom floating position;
à
p. 12 - 19
– Switch off boom pre-tensioning, if necessary;
à
p. 12 - 21
12.3.1 Switching off the boom floating position
You must switch off the boom floating position before you raise the main
boom off the dolly.
•
Remove the padlock ( 2 ).
•
Switch over valve
I
– lever ( 1 ) horizontal and
pointing outward.
•
Secure the lever ( 1 ) with the padlock ( 2 ).
•
Switch the valve
IV
over – lever ( 3 ) points
forwards.
The boom floating position is now switched off.
G
Risk of accidents from the main boom dropping down
Always secure the lever with the padlock after switching off the boom
floating position.
This prevents the raised main boom falling down when the lever is actuated.