Suspension (Air And Steel Springs); Frame And Optional Tow Hooks - IC Bus CE Series Operation And Maintenance Manual

Maintenance

Suspension (Air and Steel Springs)

CAUTION
To prevent vehicle and / or engine component
damage, do not adjust air suspension height
to any setting other than the specified setting.
Altering the height setting will change the
driveline angle and may result in unwarrantable
component damage,
component damage.
Periodically verify driveline axle air suspension height and height
control valve performance. Refer to the LUBRICATION AND
MAINTENANCE INTERVAL CHART at the end of this section.
Periodically:
• Check condition of spring leaves for evidence of fatigue,
bending or breakage.
• Check condition of suspension mounting brackets and
bushings.
• Check that torque rod mounting fasteners are tight.
NOTE: When retorque is required, make sure the part is in
like new condition. If it can't be retorqued, then the part
needs to be replaced.
176
such as transmission
Suspension alignment must be maintained at all times.
Check the U-bolts as follows:
• After the bus has been operating under load for 1,600 km
(1,000 miles), retorque the U-Bolt nuts.
• Thereafter, retorque the U-bolt nuts every 58,000 km
(36,000 miles).
• Clean and lubricate the U-Bolt, nut threads, and seats to
ensure a like new condition when retorquing.

Frame and Optional Tow Hooks

The Bus Chassis are manufactured with frame rails of High
Strength Low Alloy (HSLA) steel and must be handled in a
specific manner to ensure maximum service life.
instructions are published concerning proper repair of frame
rails. Before attempting frame repair or modification, consult the
service manager of your IC Bus dealer.
Inspect front and rear tow hooks for damage or loose mountings.
Specific