Crane operation
11.3 Crane operation with main boom
11 - 102 3 112 993 en Operating manual GMK 6400
12.07.2013
Braking the
slewing
movement
You may only brake the slewing movement with the slewing gear brake.
• Move the control lever (2) towards its initial position – the slewing move-
ment will be braked.
At the initial position, the slewing movement will be stopped. At the same
time the slewing gear brake will engage, and lamp (1) will light up.
Slewing gear
freewheel
The slewing gear freewheel is required if the slewing gear needs to be
slewed by means of external forces, e.g. when operating with two cranes.
• Switch on the slewing gear.
• Shift the control lever (2) to its initial position.
• Press button (3).
The slewing gear brake will be released – lamp (1) will not light up.
S
Risk of the main boom buckling
Do not under any circumstances switch off the slewing gear to brake it.
Only switch off the slewing gear after the superstructure has stopped turn-
ing.
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