Manitowoc GROVE GMK6400

Maintenance work on the superstructure
8.5 Slewing bearing
8 - 26 3 302 756 en Maintenance manual
GMK6400
16.11.2018
Checking the
outer ring
• Divide the checking of the 80 screws into 16 working steps of 5 screws
each.
Between each of the 16 operation steps you need to rotate the turntable
to the next group of 5 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 5 adjoining screws (1);
à Torques, p. 8 - 25.
• Mark the screws after checking, to avoid subsequent confusion.
• Remove the tool.
• Start the engine and turn the turntable by 180° – the second group of
screws on the opposite side is now accessible.
• Switch the engine off.
• Check all other groups in the same way.
Checking the
inner
ring
• Divide the inspection of the 80 screws in 40 operation steps each with a
pair of screws on the opposite side.
Between each of the 40 operation 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 opposing pair of screws (1) and (2);
à Torques, p. 8 - 25.
• Mark the screws after checking, to avoid subsequent confusion.
• 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 the engine off.
• Check all the other pairs in the same way.