Manitowoc Grove GMK 5250L Maintenance Manual page 250

Maintenance work on the superstructure
8.5 Slewing bearing
G
Access
8 - 22
Danger of the slewing bearing being ripped off.
If while checking you notice very loose, broken or missing screws, then the
slewing bearing has been overloaded and is no longer safe to use. During
crane operation, the slewing bearing may rip off suddenly and thus cause
fatal accidents.
Do not put the truck crane back into operation and have the slewing bearing
repaired by
Manitowoc Crane Care
3 302 744 en
.
The outer ring is connected to the carrier with
the screws (1).
•
Check all 96 screws (1) from above.
To do this, you must rotate the clear area (2)
on the turntable gradually to check all the
screws (1).
The inner ring is connected to the turntable
with the screws (1).
•
Check all 95 screws (1) from below.
To do this, you must rotate the turntable
gradually with a pair of screws (1) each on
the opposite side through the openings (2)
in the carrier.
Maintenance manual
GMK5250L