SECTION 2 - PROCEDURES
2-40
– JLG Lift –
3120743
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 0.057 in. (1.40 mm) is
determined, the swing bearing should be replaced.
4.
If a difference less than 0.057 in. (1.40 mm) is deter-
mined, 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.
Figure 2 31. Swing Bearing Tolerance Boom Placement - 40/n40/45 electric. (Sheet 2 of 2)
Figure 2-32. Swing Bearing Tolerance Measuring Point.
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