IC Bus CE Series 2020, Operation And Maintenance Manual

Page: 244 / 287

Maintenance
Out-of-round tires and wheel assemblies can sometimes be
corrected by reclocking the tire relative to the wheel.
Tightening procedure for disc wheels with flange nuts
(hub-piloted).
1. Clean the mating surfaces of the hub, drum, and wheel(s)
as well as the wheel studs and wheel nuts with a wire brush
prior to assembly.
2. Lubricate the two-piece wheel nuts by putting two drops of oil
in the slot between the nut and washer and spin the washer
to spread the oil around the nut-to-washer contact surface.
3. Carefully lubricate the wheel stud threads by wiping them
with a freshly oiled cloth. Do not get the oil on any other
surfaces or the wheel clamping effectiveness will be
reduced.
4. To prevent aluminum wheels from getting stuck on the hub
due to corrosion, apply a thin coat of antiseize compound
or disc brake corrosion control grease to the hub pilot pads
only.
5. Slide the inner wheel (if duals) or steer wheel over the wheel
studs and onto the pilot pads of the hub. Care must be taken
to avoid damage to the stud threads while positioning the
wheel. Ensure that the wheel is resting on the pilot pads
and is against the brake drum.
6. Hand start all wheel nuts to avoid cross-threading.
7. Starting with the nut at the 12 o’clock position and using
the appropriate star or crisscross pattern (see wheel nuts
torque sequence diagram), run the wheel nuts down the
wheel studs with an impact wrench until they are snug
against the wheel. The purpose of this step is to snug the
wheel(s) in the correct position, not to apply the final torque.
The tightening of each nut should be stopped immediately
when the wheel is contacted, resulting in a wheel nut torque
well below the final specified torque.
1. Flange nut mount – 8 stud
2. Flange nut mount – 10 stud
8. Use a calibrated torque wrench to apply the specified
torque to each wheel nut in the sequence specified in the
wheel nuts torque sequence diagram above.
Refer to
Maintenance Intervals and Specifications Section for
proper torque values.
230