JLG X23J - X700AJ Service Manual User Manual
Page 144
SECTION 3 - CHASSIS & TURNTABLE
3121448
– JLG Lift –
3-117
7. Slew Drive
8. Lower mounting structure
Procedure:
Tilting clearance measurement
9. Switch off the system and safeguard it from being
turned on again.
10. Permanently mark the measuring point in the main
load direction on the housing and on the bearing
ring.
11. Attach the dial gauge as shown in Fig. 24.
12. Apply defined tilt torque, at least 50% of max. oper-
ating load, in direction "A".
13. Set dial gauge to zero.
14. Apply defined tilt torque, at least 50% of max. oper-
ating load, in direction "B". The displayed measured
value m1 corresponds to the existing tilting clear-
ance and serves as the base value that will be used
for comparison in later inspections.
15. Log and document all measured values.
• All inspections at a later point in time must be executed
on the same measuring point, with the same loads, at
the same relative position of the bearing rings, and in
the same sequence.
• At pure axial or radial load check the tilting clearance
by applying an additional tilting load.