Manitowoc GROVE GMK3060

Crane operation
11.5 Crane operation with main boom
Operating manual 3 302 819 en 11 - 125
GMK3060
13.12.2018
Braking the
slewing
movement
You may only brake the slewing movement with the slewing gear brake.
With the brake pedal function active
• Depress the brake pedal (1). Do not brake to such a degree that the load starts
swinging.
If you only move the control lever to initial position, the slewing movement will
slowly run down.
With the control lever function active
• Move the control lever (2) towards its initial position – the slewing movement
will be braked.
At the initial position, the slewing movement will be stopped. At the same time the
slewing gear brake will be applied, 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, for example, when operating with two cranes.
With the brake pedal function active
• Switch on the slewing gear.
The slewing gear brake is released – lamp (1) lights up.
• Move the control lever (2) to its initial position.
With the control lever function active
• Switch on the slewing gear.
• Move the control lever (2) to its initial position.
• Press the button (3).
The slewing gear brake is released – lamp (1) lights up.
s
S
Risk of the main boom buckling!
On no account switch the slewing gear off to brake it; only switch the slewing
gear off when the superstructure has stopped rotating.