Maintenance work on the superstructure
8.8 Slewing bearing
8 - 54 3 302 719 en Maintenance manual
GMK6300L-1
13.02.2018
Safety
Instructions
Access to the
outer ring
The outer ring is attached to the carrier by the
bolts (1).
• Check all 88 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.
S
Risk of damage to the screws on the slewing bearing.
All screws were tightened at the factory with a certain torque, and this
should be checked during maintenance. Only slight tightening of the
screws is permissible, if required.
You may not slacken the screws and re-tighten them, or completely
unscrew and then reuse them.
If the superstructure has to be removed from the carrier, only a completely
new set of screws may be used to reinstall the superstructure. Only original
screws should be used, which were manufactured according to the factory
specifications.
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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