Clark GEX20 - Wheel Bearing Lubrication

Group 26, Steer Axle
SM 765, Dec ’06 Steering Axle Wheel Bearing maintenance and Adjustment • 26-2-1
Wheel Bearing Check.............................................. 1
Wheel Bearing Lubrication .................................. 1
Bearing Disassembly................................................ 2
Bearing Reassembly ................................................. 3
Wheel Bearing Adjustment .................................. . 4
IMP
O
RTANT
Before removing any component for overhaul, make sure the correct repair parts, seals, and gasket sets
are available.
CAUTION
!
SAFE PARKING. Before working on truck:
1. Park truck on a hard, level, and solid
surface, such as a concrete floor with no
gaps or breaks.
2. Put upright in vertical position and fully
lower the forks or attachment.
3. Put all controls in neutral. Turn key
switch OFF and remove key.
4. Apply the parking brake and block the
wheels.
5. Remove Battery Connector.
Wheel Bearing Check
Wheel bearings check should be performed every PM.
Wheel bearings need adjustment only after 2000 hours or
as needed. It is recommended that you clean and repack
the bearings before adjustment. Check hourmeter total
hours and refer to the truck’s PM schedule. See steer
wheel bearing lubrication procedure below.
To check the steer wheel bearings for excessive free play
or looseness:
1. Grasp the wheel with both hands and try to move it
by a rocking motion top-to-bottom.
2. Try to pull it in and out along the wheel spindle.
Watch for excessive free movement in wheel bearings or
steering knuckle bearings. There should be a small
amount of free movement. If the wheel has excessive free
movement, the bearings require additional service and/or
adjustment.
Wheel Bearing Lubrication
These procedures cover bearing lubrication for steer
wheels used on the truck ; pneumatic-tire wheels which
are mounted on a hub that contains the bearing compo-
nents. Use the procedures to clean, repack and adjust bear-
ings for both the pneumatic-tire hub.
The bearing components and arrangement are the same
for both the pneumatic types. Instructions for repacking/
lubricating the bearing components apply to both types.
wheel-assembly
Steer Axle Knuckle
Pneumatic-Tire
Wheel Mounting
Hub
Section 2
Steering Axle Wheel Bearing maintenance and Adjustment