Navistar WorkStar Series, Руководство оператора

Страница: 213 / 258

Maintenance Instructions
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 12:00 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.
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 SECTION
7 — MAINTENANCE INTERVALS AND SPECIFICATIONS
for proper torque values.
1. Flange Nut Mount – 8 Stud
2. Flange Nut Mount – 10 Stud
9. All wheels undergo a process called joint settling when
placed in service after a wheel installation has been
performed. This process results in a reduction in the torque
on the wheel nuts. To correct this condition, operate the
vehicle normally for approximately 50 miles (80 km), then
use a calibrated torque wrench to retorque the wheel nuts
to specification using the appropriate pattern shown in the
wheel nuts torque sequence diagram.
10. As part of a daily pretrip inspection, look for loose or missing
wheel nuts. Also look for rust streaks extending outward
from the wheel nuts; this can be an indicator that one or
more wheel nuts are loose, even if they cannot be turned
by hand. Normal periodic maintenance should also include
checking the wheel nut torque with a torque wrench.
3879634R1
201