MAINTENANCE
6-46 / Wheels and Tires
© 2020 Pierce Manufacturing Inc. All Rights Reserved.
equipment can impact the emissions of the drive engine and cause the vehicle to fall out of
compliance with the law.
To maintain emissions compliance the tires on this new vehicle must be replaced only with tires of equal or lower
rolling resistance than those originally supplied with the vehicle. Contact your tire manufacturer to determine the
correct replacement tire.
6-28. Wheels
6-28.1 Bearings
Inspect wheel bearings in accordance with the axle manufacturer’s recommended schedule. Use inspection
procedures found in the axle manufacturer’s maintenance manuals.
6-28.2 Wheel Installation – General
Proper installation of rims and wheels on a vehicle is essential to safe, economical, trouble-free service.
• Use only the specified sizes of studs, nuts, and clamps.
• Check all parts for damage, including wheels and rims.
• Ensure that studs, nuts, and mounting faces of hub and wheels are sound, clean, and free from grease.
• Clean hub surfaces with wire brush if scale is present.
• Lubricate wheel studs as described in “Hub Piloted Wheel Installation” on page 6-47.
• Replace any damaged parts.
• Refer to the following Pierce service groups for additional wheel dismounting / mounting information:
— “Front Wheel and Tire Service”, Service Group 0705-P-001
— “Rear Wheel and Tire Service”, Service Group 0710-P-002
• Consult wheel manufacturer’s installation procedures for detailed instructions and replacement part
recommendations.
Improper installation methods or component selection can cause loss of torque, broken studs, or
cracked wheels. Improperly seated wheels can run loose, cause stud breakage, or disengage from the
vehicle. Any of these problems may lead to loss of vehicle control, serious property damage, personal
injury, or death.
Wheel nuts must be checked for proper torque after the first 50 to 100 miles of service, then frequently
as part of periodic maintenance. Failure to verify wheel nut torque may lead to loss of vehicle control,
serious property damage, personal injury, or death.
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