Peterbilt 579 - General Maintenance; Rear Axle and Suspension

REAR AXLE AND SUSPENSION
5
REAR AXLE
AND
SUSPENSION
General Maintenance
WARNING!
Do not work on the vehicle without the
parking brake set and wheels blocked
securely. If the vehicle is not secured
to prevent uncontrolled vehicle move
-
ment, it could roll and may result in
death, personal injury, equipment or
property damage.
Your vehicle's suspension, by
design, requires a minimal amount of
maintenance. However, suspensions
in over-the-road operations require
periodic inspection to ensure trouble-
free performance.
WARNING!
Do not operate the vehicle if the
U-bolts are not properly tightened.
Loose U-bolts will cause the axle to
not be properly secured to the sus
-
pension, which could cause loss of
vehicle control and an accident. Loose
U-bolts can also cause uneven tire
wear and poor alignment. Failure to
comply may result in death, personal
injury, equipment or property damage.
WARNING!
Failure to maintain the specied
torque values or to replace worn parts
can cause component system failure,
possibly resulting in an accident. Im
-
properly tightened (loose) suspension
U-bolts can lead to unsafe vehicle
conditions, including: hard steering,
axle misalignment, spring breakage or
abnormal tire wear. See Front Spring
Suspension U-bolts on page 5-110 for
proper torque specications. Failure
to comply may result in death, per
-
sonal injury, equipment or property
damage.
Do not spray the suspension with
chemical products or mineral oil; it can
cause damage to the bushings.
CAUTION
5-124 Y53-6047–2C (04/13)