Maintenance work on the superstructure
8.5 Slewing bearing
8 - 24 3 302 744 en Maintenance manual
GMK5250L
09.03.2018
Checking the
outer ring
• Divide the checking of the 96 screws into 24 working steps of 4 screws
each.
Between each of the 24 working steps you need to rotate the turntable to
the next group of 4 screws on the opposite side.
• Switch the engine off after every rotation and secure the truck crane
against unauthorised use;
à p. 2 - 3.
• Check the tightness of the first group of 4 adjoining screws (1);
à Torques, p. 8 - 23.
• Once they have been checked, mark the screws to avoid subsequent con-
fusion.
• Remove the tool.
• Start the engine and turn the turntable by 180° – the second group on the
opposite side is now accessible.
• Switch off the engine.
• Check all other groups in the same way.
Checking the inner
ring
• Divide the inspection of the 95 screws into 23 work steps with 4 screws
each and 1 work step with 3 screws.
Between each of the 24 working steps you need to rotate the turntable to
the next pair of screws on the opposite side.
• Switch the engine off after every rotation and secure the truck crane
against unauthorised use;
à p. 2 - 3.
• Check the tightness of the first pair of screws (1) and (2) on the opposite
side;
à Torques, p. 8 - 23.
• Mark the screws that have been checked, to avoid confusion later.
• Remove the tool.
• Start the engine and turn the turntable by 90° – the second pair of screws
on the opposite side is now accessible.
• Switch off the engine.
• Check all other screws in the group in the same way.
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