Inspect For Turntable Bearing Wear - Genie S-40 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
D-7
Inspect for Turntable Bearing
Wear
Genie specifications requires that this procedure
be performed every 1000 hours or annually,
whichever comes first.
Periodic inspection of turntable bearing wear is
essential to safe machine operation, good machine
performance and service life. Continued use of a
worn turntable bearing could create an unsafe
operating condition, resulting in death or serious
injury and component damage.
Note: Perform this procedure with the machine on
a firm, level surface and the boom in the stowed
position.
3 Start the machine from the ground controls and
raise the boom to full height. Do not extend the
boom.
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.
3 - 48
a
b
c
d
5 At the dial indicator, adjust it to "zero" the
indicator.
6 Fully extend the boom and lower to a horizontal
position.
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.
S-40 • S-45
October 2013
a turntable
b dial indicator
c drive chassis
d turntable rotation bearing
Part No. 102521