STEERING PART 8: MAINTENANCE AND SERVICE
– 184 – Y53-6007 (R10/06)
If these checks do not reveal the problem, or if you correct
them and still have a steering problem, take your vehicle
to an authorized dealer for evaluation.
Front End Alignment
For driving safety and comfort, and to prolong the life of
your vehicle, it is important to have proper front end align
-
ment. Check tire wear frequently. Uneven tire wear is a
sign that your front end or rear axles may be misaligned.
If you see uneven wear, take your vehicle to a service cen-
ter familiar with aligning front ends on Peterbilt vehicles.
Rear Axle Alignment
Continual road shock and load stresses may force your
rear axles out of alignment. If you detect rapid tire wear on
the rear axles, you may have misaligned axles. If you sus
-
pect you do, have your rear axle alignment checked and
adjusted by an authorized dealership.
U-Bolt Tension for Front and Rear Axles
It is important that U-bolts remain tight. Off-highway use of
your vehicle will cause them to loosen faster. But all vehi
-
cles need to have their U-bolts checked and tightened
regularly. Be sure someone with the proper training and
the right tools checks and tightens the U-bolts on your
Peterbilt. The proper torque requirements are specified in
the Peterbilt Maintenance Manual for your vehicle.
WARNING! U-bolts that are too loose can
cause an injury accident. Loose U-bolts can
cause uneven tire wear, poor alignment, and
loss of control of your vehicle. You probably
can’t tighten U-bolts correctly yourself. But be
sure to have them checked and tightened reg
-
ularly by an authorized mechanic.
• For on-highway vehicles, tighten the U-
bolts after the first 15,000 miles (24,000 km).
Then tighten them every 60,000 miles
(96,000 km) after that.
• For off-highway vehicles, tighten the U-
bolts after the first day or two of operation.
Then tighten them every 15,000 miles
(24,000 km) after that.
• Failure to maintain the specified torque values
or to replace worn parts can cause compo
-
nent system failure, possibly resulting in an
injury accident. Improperly tightened (loose)
suspension U–bolts can lead to unsafe vehi
-
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