Grease The Steer Axle Wheel Bearings - Genie Z-30/20N Service Manual

June 2011
REV A
E-2
Grease the Steer Axle
Wheel Bearings
Note: Genie requires that this procedure be
performed every 2000 hours or every two years,
whichever comes first.
Maintaining the steer axle wheel bearings is
essential for safe machine operation and service
life. Operating the machine with loose or worn
wheel bearings may cause an unsafe operating
condition and continued use may result in
component damage. Extremely wet or dirty
conditions or regular steam cleaning and pressure
washing of the machine may require that this
procedure be performed more often.
1 Loosen the wheel lug nuts. Do not remove
them.
2 Block the non-steer wheels and center a lifting
jack under the steer axle.
3 Raise the machine 6 inches / 15 cm and place
blocks under the drive chassis for support.
4 Remove the lug nuts. Remove the tire and
wheel assembly.
5 Check for wheel bearing wear by attempting to
move the wheel hub side to side, then up and
down.
Result: There should be no side to side or up
and down movement.
Skip to step 10 if there is no movement.
Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Section 3 • Scheduled Maintenance Procedures
CHECKLIST E PROCEDURES
6 Remove the dust cap from the hub. Remove the
cotter pin from the castle nut.
7 Tighten the castle nut to 158 ft-lbs / 214 Nm to
seat the bearings.
Note: Rotate the hub by hand while torquing the
castle nut to make sure the bearings seat properly.
8 Loosen the castle nut one full turn and then
torque to 35 ft-lbs / 47 Nm.
9 Check for wheel bearing wear by attempting to
move the wheel hub side to side, then up and
down.
Result: If there is no side to side or up and
down movement, continue with step 10 to
grease the wheel bearings.
Result: If there is side to side or up and down
movement, continue to step 10 and replace the
wheel bearings with new ones.
Note: When replacing a wheel bearing, both the
inner and outer bearings, including the pressed-in
races, must be replaced.
10 Remove the castle nut.
11 Pull the hub off of the spindle. The washer and
outer bearing should fall loose from the hub.
12 Place the hub on a flat surface and gently pry
the bearing seal out of the hub. Remove the
rear bearing.
13 Pack both bearings with clean, fresh grease.
Grease Specification
Chevron Ultra-duty grease, EP NLGI 2 (lithium based)
or equivalent
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