JLG 1350SJP Service Manual - Manual (Page 150)

SECTION 3 - CHASSIS & TURNTABLE
3-104 – JLG Lift – 3121142
5. At the rear of the main valve, remove the lift hose from
port #4. Immediately cap the line and port.
6. Attach suitable overhead lifting equipment to the
machine. Refer to Figure 3-57., Swing Bearing Removal.
7. Use a suitable tool to scribe a line on the inner race of
the swing bearing and on the underside of the turnta-
ble. This will aid in aligning the bearing upon installa-
tion. Remove the bolts and washers which attach the
turntable to the bearing inner race. Discard the bolts.
8. Use the lifting equipment to carefully lift the complete
turntable assembly from the bearing. Ensure that no
damage occurs to the turntable, bearing or frame-
mounted components.
9. Carefully place the turntable on a suitably supported
trestle.
NOTE: The swing bearing weighs approximately 300 lbs. (136 kg).
10. 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.
Swing Bearing Installation
NOTE: The swing bearing weighs approximately 300 lbs. (136 kg).
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 spot with minimum gear backlash
(marked with yellow paint) is towards the centerline of
the swing drive (as close as the bolt pattern will allow).
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 Loctite #271 to the new bearing
bolts, and loosely install the bolts and washers through
the frame and outer race of bearing.
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.
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