Maintenance work on the superstructure
8.5 Slewing bearing
8 - 22 3 302 649 en Maintenance manual
GMK4090
07.12.2017
Access
The outer ring is attached to the carrier by the
bolts (1).
• Check all 68 bolts (1) from above.
To do this, you must move the clear area (2)
on the turntable round step by step to allow
all the bolts (1) to be checked.
The inner ring is attached to the turntable by
the bolts (1).
• Check all 67 bolts (1) from below.
To do this, you must rotate the turntable
gradually to gain access to a pair of bolts (1)
opposite one another, through the open-
ings (2) in the carrier.
G
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.
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