Swing Bearing Torquing Sequence - JLG E450A Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE
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.
g. Following the torque sequence diagram shown in
Figure 3-24., tighten the bolts to an initial torque of
130 ft. lbs. (175 Nm). Then following the same
sequence, tighten to a final torque of 190 ft. lbs. (260
Nm).
h. Remove lifting equipment from bearing.
i. Use suitable lifting equipment to carefully position
the turntable assembly above the machine frame.
j. Carefully lower the turntable onto the swing bear-
ing. Ensure that the scribed line of the inner race of
the bearing aligns with the scribed mark on the
turntable. If a new swing bearing is used, ensure
that the filler plug fitting is at 90 degrees from the
fore and aft centerline of the turntable.
3-32
Figure 3-24. Swing Bearing Torquing Sequence
k. Apply a light coating of JLG Threadlocker
PN 0100019 to the new bearing bolts and install
through the turntable and inner race of bearing.
l. Following the torque sequence shown in Figure 3-
24., tighten the bolts to an initial torque of 130 ft.
lbs. (175 Nm). Then following the same sequence,
tighten the bolts to 190 ft. lbs (260 Nm).
m. Remove the lifting equipment.
n. Route hydraulic lines through center of turntable
and frame and connect as tagged prior to removal.
o. Using all applicable safety precautions, activate the
hydraulic system and functionally check swing sys-
tem for proper and safe operation.
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