JLG M450 ANSI Service Manual - Manual (Page 82)

SECTION 3 - CHASSIS & TURNTABLE
3-42 – JLG Lift – 3121127
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 3-15., 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 posi-
tion the turntable assembly above the machine
frame.
j. Carefully lower the turntable onto the swing
bearing. 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.
k. Apply a light coating of Loctite 271 to the new
bearing bolts and install through the turntable
and inner race of bearing.
l. Following the torque sequence shown in Figure
3-15., 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 system for proper and safe operation.
Figure 3-15. Swing Bearing Torquing Sequence