Genie S-80 Service Manual page 82

Section 3 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
4 Place a dial indicator between the drive chassis
and the turntable at a point that is directly
under, or inline with, the boom and no more than
1 inch / 2.5 cm from the bearing.
Note: To obtain an accurate measurement, place
the dial indicator no more than 1 inch /
2.5 cm from the turntable rotation bearing.
a
b
c
d
a turntable
b dial indicator
c drive chassis
d turntable rotation bearing
5 At the dial indicator, adjust it to "zero" the
indicator.
6 Fully extend the boom and lower to a horizontal
position.
3 - 52
7 Note the reading on the dial indicator.
Result: The measurement is less than
0.063 inch / 1.6 mm. The bearing is good.
Result: The measurement is more than
0.063 inch / 1.6 mm. The bearing is worn and
needs to be replaced.
8 Fully retract the boom and raise the boom to full
height. Visually inspect the the dial indicator to
be sure the needle returns to the "zero" position.
9 Remove the dial indicator and rotate the
turntable 90°.
10 Repeat steps 4 through 9 until the rotation
bearing has been checked in at least four
equally spaced areas 90° apart.
11 Lower the boom to the stowed position and turn
the machine off.
12 Remove the dial indicator from the machine.
S-80 • S-85 • S-80X
February 2012
Part No. 122985