Only with a slewing drive
If the jib arm exhibits excess overrun, starts up too slowly or brakes too suddenly, the friction clutch on the slewing gear must be adjusted.
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Hexagon head screw |
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Lock nut |
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Screw in, or unscrew, the hexagon head screw by one rotation to
adjust the slewing gear overrun.
Adjustment using the hexagon head screw is highly sensitive. Therefore only unscrew, or screw in, the hexagon head screw by a few degrees and check the adjustment directly.
─ Screw in the hexagon head screw: the friction clutch runs more tightly. The jib crane exhibits less overrun, comes to a standstill more quickly and starts up more quickly. The tighter the friction clutch setting, the higher the load the slewing drive, crane and surrounding constructions are subject to due to acceleration and braking.
─ Unscrew the hexagon head screw: the friction clutch runs with more softness. The jib crane exhibits more overrun, takes longer to come to a standstill and takes longer to start up. The softer the friction clutch setting, the less mehr the load the slewing drive, crane and surrounding construction are subject to due to acceleration and braking.
Tighten the locknut.