JLG 740AJ, Руководство по обслуживанию и ремонту

Страница: 104 / 582

SECTION 3 - CHASSIS & TURNTABLE
3-52 3121160
8. Carefully place the turntable on a suitably supported
trestle.
9. Use a suitable tool to scribe a line on the outer race of
the swing bearing and the frame. This line will aid in
aligning the bearing upon installation. Remove the bolts
and washers which attach the outer race of the bearing
to the frame. Discard the bolts. Use suitable lifting
equipment to remove the bearing from the frame, then
move the bearing to a clean, suitably supported work
area.
INSTALLATION
1. Using suitable lifting equipment, carefully lower the
swing bearing into position on the frame. Ensure the
scribed line of the outer race of the bearing aligns with
the scribed line on the frame. If a new swing bearing is
used, ensure that the filler plug fitting is at 90 degrees
from the fore and aft center line of the frame.
JLG INDUSTRIES RECOMMENDS THAT ALL REMOVED BEARING BOLTS BE DIS-
CARDED AND REPLACED WITH NEW BOLTS. SINCE THE SWING BEARING IS THE
ONLY STRUCTURAL LINK BETWEEN THE FRAME AND TURNTABLE, IT IS IMPER-
ATIVE THAT SUCH REPLACEMENT HARDWARE MEETS JLG SPECIFICATIONS.
USE OF GENUINE JLG HARDWARE IS HIGHLY RECOMMENDED.
2. Apply a light coating of JLG Threadlocker P/N 0100019
to the new bearing bolts, and loosely install the bolts
and washers through the frame and outer race of bear-
ing.
IF COMPRESSED AIR OR ELECTRICALLY OPERATED IMPACT WRENCH IS USED
FOR TIGHTENING THE BEARING ATTACHMENT BOLTS, THE TORQUE SETTING
ACCURACY OF THE TOOL SHOULD BE CHECKED PRIOR TO USE.
Figure 3-42. Swing Bearing Torque Sequence.