Maintenance work on the superstructure
8.5 Slewing bearing
09.03.2018
Maintenance manual 3 302 744 en 8 - 21
GMK5250L
8.5 Slewing bearing
8.5.1 Checking the screws
• Comply also with the à Run-in regulations, p. 4 - 1.
Tools – Torque wrench.
– Auxiliary tools for the torque wrench; à p. 8 - 23.
Prerequisites – No counterweight has been rigged; à Operating manual.
– The crane must be rigged with an outrigger span of at least 8.95 x 7.80 m
(29.4x25.6ft) and be level;
à Operating manual.
– In addition, the tyres on the 3
rd
and 4
th
axle lines must be removed to
improve the freedom of movement under the slewing bearing.
– The main boom must be fully retracted and raised to 75°; à Operating
manual
.
– The current load must not exceed 1 t (2,200 lbs) – where necessary
unreeve the hook block.
– The slewing range 360° around the truck crane must be secured.
– The engine must be switched off and secured against unauthorised use;
à p. 2 - 3.
Safety
instructions
s
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.
To Next Page
Loading...
Need help?
General
