Inspect For Turntable Bearing Wear - Genie TZ-34/20 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
2 Working through the bearing bolt access,
be sure that each turntable rotation bearing
mounting bolt is torqued in sequence to
specifi cation. See below.
Note: The rotate bearing bolt access is located
next to the turntable rotate motor.
9
6
16
3
14
8
12
Bearing-to-chassis bolt torque sequence
Turntable rotation bearing bolt torque specifi cations
Bearing to chassis
Bearing to swing chassis
*Not lubricated from serial number TZ3416-1689.
**Lubricated to serial number TZ3416-1688.
3 - 26
Tongue
1
11
7
13
4
15
5
10
2
Gray* Black**
130 ft-lbs 95 ft-lbs
176 Nm 129 Nm
250 ft-lbs 200 ft-lbs
339 Nm 271 Nm
Genie TZ-34/20
D-5
Inspect for
Turntable Bearing Wear
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 fi rm, level surface and the boom in the stowed
position.
1 Grease the turntable bearing. See A-8, Grease
the Turntable Rotation Bearing and Rotate
Gear.
2 Torque the turntable bearing bolts to
specifi cation. See D-4, Check the Turntable
Rotation Bearing Bolts.
3 Start the machine from the ground controls and
raise the primary and secondary booms to full
height. Do not extend the primary 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.
January 2016
Part No. 825934