© 2020 Pierce Manufacturing Inc. All Rights Reserved. Axles, Brakes and Suspension / 6-9
MAINTENANCE
Axles, Brakes and Suspension
6-9. Axles
6-9.1 Front Axle – Non-Driving
Inspect the front axle for damaged, binding, or worn parts. Check the kingpins for excessive wear. Refer to the axle
manufacturer’s maintenance manual (included in the Pierce Service Manual) for maintenance schedules, lubrication
recommendations, and inspection procedures.
6-9.2 Front Axle Alignment
Kingpin inclination and camber are factory set by the axle manufacturer and are not adjustable. Caster is set at the
factory by including tapered shims in the front spring pack as required.
Check toe-in adjustment by following the instructions in the axle manufacturer’s maintenance manual. Set toe-in to
the following values:
6-9.3 Front Axle – TAK-4™ Suspension
Refer to the Pierce Service Manual, group 0152-P-004, TAK-4™ Maintenance, Inspection, and Troubleshooting, for
suspension inspection information.
Refer to the Pierce Service Manual, group 0601-P-002, TAK-4™ Steering Components and Adjustments, for
alignment information.
6-9.4 Rear Axle
Inspect the rear axle for damage, leaks, or interference’s with other chassis components. Refer to the axle
manufacturer’s maintenance manual (included in the Pierce Service Manual) for maintenance schedules, lubrication
recommendations, and inspection procedures.
Most tire wear is caused by incorrect toe settings. Do not change camber or caster settings to correct
tire wear problems. If the axle assembly is bent to change caster or camber, the strength of the axle is
reduced and the warranty is voided. An axle damaged by bending may cause a vehicle accident and
result in serious personal injury or death.
Unloaded Vehicle: 1/16-inch ± 1/32 inch
Loaded Vehicle: 1/32-inch ± 1/32 inch
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