Group 26, Steer Axle
SM 765, Dec ’06 Pivot-Turn Steering Axle Maintenance • 26-7-5
Bearing Disassembly
1. Be sure truck is parked and blocked up correctly and
safely to raise steer wheels off the floor. Refer to
“Lifting, Jacking, and Blocking,” in the Group “SA.”
N
TE
Because of the heavy weight of the wheel and
tire, it is suggested to first remove the wheel
and tire assembly from spindle when servic-
ing the bearings to avoid damage to the
grease seal when the wheel hub is moved off
or on the spindle. It also makes the work sim-
pler and easier.
2. Refer to the exploded view illustration of the wheel
bearing assembly. Loosen and remove the hubcap
from wheel or hub. You may have to lightly tap hub
cap with a hammer and chisel and use a pry bar to
loosen. Be careful not to damage mounting surfaces.
Remove O-ring from hubcap.
3. Clean the excess grease from around the wheel nut.
4. Remove cotter pin, loosen and remove wheel nut and
bearing washer.
Wheel Bearing Assembly
.
5. Pull the wheel or hub off the spindle. Support the
wheel or hub to avoid dragging the grease seal at the
back side across the thread on spindle end.
6. Clean the old grease out of center of the wheel or
hub.
7. To remove inner bearing and seal, lay wheel or hub
down with outer edge up (support hub on blocking).
Remove the inner bearing cone and grease seal, using
a brass drift pin, rod, or piece of pipe to drive the
bearing and seal out of the hub.
8. Clean and inspect the bearing cups and cones for
wear or other damage. Replace, as necessary.
IMP
RTANT
Keep serviceable bearing cups and cones
matched together. Always replace bearing
cups and cones as a set.
9. Inspect grease seal for wear and damage. Replace as
necessary. It is recommended to install a new grease
seal whenever old ones are removed.
10. Use a standard puller to remove bearing cups from
hub or wheel if bearings require replacement.
Steering Axle Knuckle
Spindle
Tire and Whel
Bearing
Bearing
Washer
O-ring
Hub cab
Wheel nut and
Cotter pin
Bearing &
Cone
Grease Seal
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