JLG 45e Service Manual - Manual (Page 62)

SECTION -
-36 – JLG Lift – 3120861
Figure 2 31. Swing Bearing Tolerance Boom Placement - 40/n40/45 electric. (Sheet 2 of 2)
35/n35 electric - At the same point, with the boom posi-
tioned over the side of the machine, the Upper Boom fully
elevated and the Lower Boom horizontal, (See Figure 2-31
b.) using a magnetic base dial indicator, measure and
record the distance between the swing bearing and turn-
table (See Figure 2-32).
40/n40/45 electric - At the same point, with the boom posi-
tioned over the side of the machine, the Upper Boom fully
elevated and the Mid/Lower Boom fully elevated, (See Fig-
ure 2-31 b.) using a magnetic base dial indicator, measure
and record the distance between the swing bearing and
turntable (See Figure 2-32).
3. If a difference greater than 1.40 mm is determined,
the swing bearing should be replaced.
4. If a difference less than 1.40 mm is determined, and
any of the following conditions exist, the bearing
should be removed.
a. Metal particles in the grease.
b. Increased drive power.
c. Noise.
d. Rough rotation.
5. If bearing inspection shows no defects, reassemble
bearing and return to service.
Replacement of Swing Bearing.
1. Removal.
a. Attach an adequate support sling to the boom
and draw all slack from sling. Prop or block the
boom if feasible.
Figure 2-32. Swing Bearing Tolerance Measuring Point.