Check The Turntable Rotation Gear Backlash - Genie S-100 Service Manual

Section 4 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
3 Be sure that each turntable rotation bearing
mounting bolt above the turntable is torqued in
sequence. Refer to Section 2, Specifications.
Bolt torque sequence
4 Raise the boom to a horizontal position.
5 Remove the safety chock and lower the boom to
the stowed position.
6 Be sure that each turntable rotation bearing
mounting bolt under the drive chassis is torqued
in sequence. Refer to Section 2, Specifications.
The turntable rotation bearing bolt
torque sequence is the same from
above the turntable and below the
drive chassis.
4 - 54
D-5
Check the Turntable Rotation
Gear Backlash
Properly adjusted turntable rotation gear backlash
is essential for good machine performance and
service life. Improperly adjusted turntable rotation
gear backlash will cause the machine to perform
poorly and continued use will cause component
damage. The turntable rotation drive hub is
mounted on the swing chassis behind the fixed side
cover at the ground controls side.
1 Rotate the turntable until the boom is centered
between the circle end wheels.
2 Apply approximately 20 lbs (89 N) of side force
to the platform, moving the platform to one side
as far as it will go.
S-100 & S-105 & S-120 & S-125
January 2010
Genie specifications require that
this procedure be performed every
1000 hours or annually, whichever
comes first.
Be sure to check the backlash with
the machine fully stowed and the
counterweight at the square end of
the machine.
Select a test area that is firm, level
and free of obstructions.
Part No. 62401
REV A