Manitowoc Grove GMK 4100L-1, Operating Manual

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Driving modes
6.3 Rigging work for driving with a dolly
Operating manual 3 302 690 en 6 - 15
GMK4100L-1
2
3
.1
1.
201
7
6.3.2
Switching on the boom floating position
If the main boom has been placed on a dolly, the boom floating position
must be switched on so that the main boom can move up and down.
•
Confirm the current rigging mode.
•
Fully retract the main boom.
•
Raise the main boom to a permitted angle within the working range.
•
Turn the superstructure to the
0° to the rear
working position and place the
main boom on a dolly.
•
Remove the padlock ( 2 ).
•
Switch over valve
I
– lever ( 1 ) upwards.
•
Secure the lever ( 1 ) with the padlock ( 2 ).
•
Switch the valve
IV
over
–
Lever ( 3 ) points
downwards.
The boom floating position is now switched on.
H
Switching off the boom floating position;
à
p. 12 - 19.
G
Risk of accidents from the boom floating position being switched off
Always switch on the boom floating position when the main boom is on a
dolly.
This prevents the full weight of the dolly briefly becoming suspended from
the main boom on uneven ground, the axle loads from rising suddenly, or
the truck crane from tipping when driving around corners.
G
Risk of accidents from the main boom dropping down
You may only switch the boom to the floating position once the main boom
has already been set down on the dolly.
This prevents the raised main boom from dropping down.