freightliner Custom Classic MT45 2022 Maintenance Manual page 64

32
the Walk-In Van Chassis Workshop Manual for in-
structions, or take the vehicle to an authorized
Freightliner dealer.
WARNING
Do not replace individual leaves of a damaged leaf
spring assembly; replace the complete spring as-
sembly. Visible damage (cracks or breaks) to one
leaf causes hidden damage to other leaves. Re-
placement of only the visibly damaged part(s) is
no assurance that the spring is safe. On front
spring assemblies, if cracks or breaks exist in the
two top leaves, a loss of vehicle control could
occur. Failure to replace a damaged spring assem-
bly could cause an accident resulting in property
damage, serious personal injury, or death.
IMPORTANT: On multi-leaf suspensions, closely
inspect each component of the leaf spring as-
semblies, including the brackets, U-bolts, and
related parts.
Spring Shock Absorber Check
Make sure that the shock absorber brackets are tight
and that the shock absorber is not striking or rubbing
on the frame or some other part of the chassis.
Check the rubber mounting bushings and replace
them if worn. Inspect the shock absorber for oil leak-
age, which is defined as being drips of oil on the
sides of the shock absorber.
If the shock absorber is worn or damaged, replace it
with a new one.
Single Spring and Radius Rod
Bushing Check
1. Without detaching the torque arms, use your
hand to attempt to move each of the radius rod
ends up, down, in, and out. If there is any move-
ment, replace the torque arm.
2. Inspect the weld seams between the torque arm
tube and the shorter bushing tubes. If there are
cracks, replace the torque arm. Do not weld the
torque arm for any reason.
3. Inspect the rubber bushing ends. See
place the torque arm for any of the following rea-
sons:
32/2
05/27/93
56-Inch Multi-Leaf Spring
Component Check
No lubrication is required on the 56-inch multi-leaf
spring rear suspension.
Inspect the stabilizer bar, if present, for irregular
bushing wear or cracks in the brackets. Check the
rubber helper spring, if present, for cracks.
AirLiner Component Clearance
Check
Check that the air line support brackets are posi-
tioned so the air lines do not rub against anything.
Reposition any configurations that could contact the
air line and result in friction and wear. There must be
at least 1 inch (25 mm) clearance around the rubber
air spring when inflated. If the clearance is less than
1 inch (25 mm), relocate the obstructing parts.
Fig. 1. Re-
Failure to relocate obstructing parts could result
in damage to the air spring.
• There are gaps between the rubber bush-
ing and the pin or the outer steel sleeve.
• Either bushing end contacts a torque arm
pin mounting bolt.
• There are cracks in the bushing.
• Part of the rubber bushing extends beyond
the outside diameter of the outer bushing
sleeve.
Fig. 1, Torque Arm Bushings
NOTICE
Walk-In Van Chassis Maintenance Manual, July 2015
Suspension
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