Manitowoc GROVE GMK7450 Maintenance Manual page 265

Measuring tilting
play
Base value + max. permissible wear =
Example:
Maintenance manual
GMK7450
The base value of the tilting play is determined and documented by
Manitowoc Crane Care
bearing is put into operation or replaced.
The maximum permissible wear is 1 mm (0.039 in).
This results in the maximum permissible tilting play.
0.12 mm (0.005 in) + 1 mm (0.039 in)
If the current tilting play is greater than the max. permissible tilting play,
you must have the slewing bearing replaced by
authorised GROVE dealer.
If the current tilting play is half as great as the max. permissible tilting play,
you must reduce the maintenance interval;
or an authorised GROVE dealer when the ball slewing
Measuring current tilting play
•
Raise the main boom completely and slew
to -135° – display (A).
•
Fasten a dial gauge on the front on the turn-
table (4) and place the button (1) on to the
lower ring (3) as close as possible to the gas-
ket (2).
•
Slowly lower the main boom completely.
The hook block may not touch the ground.
•
Read off from the dial gauge how far the
turntable is inclined and record this value as
the current tilting play;
play measurement report .
•
Remove the dial gauge.
•
Repeat the measurement with the slewing
angles
B –45°
C +45°
D +135°
3 302 577 en
Maintenance work on the superstructure
8.8 Slewing bearing
max. permissible tilting play
1.12 mm (0.044 in)
à
Appendix – Tilting
Manitowoc Crane Care
à
Reducing the interval , P. 8 - 62.
or an
8 - 63