March 2022
Maintenance Manual
Programmed Maintenance Procedures
Part No. 1268489GT
S
®
Booms • Z
®
Booms
171
P2-6
Check the Extendable Axle Wear
Pads - S-100, S-105, S-120, S-125,
S-100HD and S-120HD
Genie requires that this procedure be performed
every 2000 hours.
Maintaining the axle wear pads in good condition
is essential to safe machine operation. Wear pads
are placed on axle tube surfaces to provide a low
friction, replaceable wear pad between moving
parts. Improperly shimmed wear pads or continued
use of worn out wear pads may result in
component damage and unsafe operating
conditions.
Note: Be sure that the axles are fully extended
before attempting this procedure.
1 Measure each wear pad.
Wear pad specifications
Minimum
Top, side and bottom wear pads
0.437 inch
1,12 mm
2 Replace any wear pad if it is less than
specification. If a wear pad is not less than
specification, shim as necessary to obtain
minimum clearance and no drag.
Note: If the wear pads are still within specification.
Refer to Repair Procedure in the appropriate
Service and Repair Manual for your machine,
How
to Shim the Extendable Axles
.
Note: If any wear pads are replaced, refer to
Repair Procedure in the appropriate Service and
Repair Manual for your machine,
Grease the
Extendable Axles
.
3 Extend and retract the axles through the
entire range of motion to check for tight spots
that may cause binding or scraping of the axle
tubes.
Note: Always maintain squareness between the
outer and inner axle tubes.
P2-7
Check the Turntable Rotation
Gear Backlash - ALC1000 Models
Genie requires that this procedure be performed
every 2000 hours.
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 hubs are
mounted on an adjustable plate on the swing
chassis behind the fixed side cover at the ground
controls side of the machine.
This procedure does not apply to the Z-
60/80 models.
Note: Perform this procedure with the machine
fully stowed and the counterweight at the square
end of the machine.
Note: Perform this procedure with the machine on
a firm, level surface that is free of obstructions.
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.
3 Using a feeler gauge, measure the gap
between the swing hub pinion gear and the
turntable rotation bearing at the center tooth
on one of the drive hubs. The gap should be
measured on one side of the pinion gear on
the center tooth.
Note: The pinion gear can be accessed on the
outside of the chassis under the pinion gear guard.