Manitowoc GROVE GMK4090 - Rigging Work after Driving with a Dolly; Switching off the Boom Floating Position

Rigging work
12.3 Rigging work after driving with a dolly
Operating manual 3 302 736 en 12 - 19
GMK4090
xx.xx.xxxx
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 float-
ing position.
This prevents the raised main boom falling down when the lever is
actuated.