Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Preventive Maintenance
Rear Axle and Suspension
1
3
Rear Suspension Fasteners
Continual road shock and load stresses may force the rear
axles out of alignment. If you detect rapid tire wear on the
rear axles, you may have misaligned axles. Have your rear
axle alignment checked and adjusted by a Peterbilt Dealer or
Authorized Service Center.
Rear Axle Filler and Drain Holes and Breather Vent
Axle Housing Breather Vent
• Check and clean the axle housing breather vent (3) at
each oil level check.
2
0446A
Every 5,000 miles (8000 km) or 180 days, whichever occurs
first and thereafter, retorque all suspension fasteners to recommended
specifications. See the Fastener Torque Table for
proper torque specifications.
Load the vehicle to its normal gross weight before tightening
U-bolts. Loading the vehicle ensures proper adjustment of
the U-bolt and spring assembly.
U–bolts are difficult to tighten unless you have the right
equipment. If you cannot tighten them correctly yourself, be
sure to have them checked and tightened regularly by an
authorized mechanic.
Medium Duty (R10/06) Y53-6008 – 215 –