JLG M400 Service Manual Service Manual - Manual (Page 82)

SECTION 3 - CHASSIS & TURNTABLE
3-40 – JLG Lift – 3121827
Wear Tolerance
1. With the boom positioned over the side of the
machine, the Upper Boom horizontal with telescope
fully extended and Mid/Lower Boom stowed, (See
Figure 3-13.), using a magnetic base dial indicator,
measure and record the distance between the swing
bearing and turntable. (See Figure 3-14.
2. At the same point, with the boom positioned over
the side of the machine, the Upper Boom fully ele-
vated and the Mid/Lower Boom fully elevated, (See
Figure 3-13.) using a magnetic base dial indicator,
measure and record the distance between the swing
bearing and turntable (See Figure 3-14.).
Figure 3-13. Swing Bearing Tolerance Boom Placement