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 if
worn. Inspect the shock absorber for oil leakage,
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.
Freightliner 23K, 26K, 30K
Spring Single and Tandem
Radius Rod Bushing and Spring
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
movement, 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 spring leaves for cracks, gouges,
wear, or abnormal bends.
4. Inspect the rubber bushing ends. See
Fig. 1.
Replace the torque arm for any of the following
reasons:
• There are gaps between the rubber
bushing 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.
Freightliner Spring Tandem
Suspension Equalizer Bushing
Check
1. Block the frame up enough to take the weight of
the chassis off of the springs. Attempt to move
the equalizer up and down, by using a pry bar
between the top of the equalizer and the top of
the equalizer bracket. Apply hand-pressure only.
See
Fig. 2. If movement at the center of the
equalizer exceeds 1/8 inch (3 mm), replace the
equalizer bushings.
2. With the vehicle unloaded, attempt to move the
equalizer side to side using a pry bar between
the equalizer and frame rail. Apply hand-pressure
only. See
Fig. 3. If clearance between the
equalizer assembly and any frame component or
fastener is less than 1/8 inch (3 mm), replace the
equalizer bushings.
f320021a
05/27/93
Fig. 1, Torque Arm Bushings
f320022a
05/27/93
1
2
3
A
A. Measure the change in gap at this point.
1. Equalizer Bracket
2. Equalizer
3. Pry Bar
Fig. 2, Side View of the Equalizer
Suspension32
Business Class M2 Plus Maintenance Manual, 02/10/202332/2
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