Try to move the torque rod ends using your
hands only, and check for any free-play. If free-
play is felt, replace the torque rod end bushing.
Do not use a pry bar to check for free-play. Use
of a pry bar may lead to premature bushing re-
placement.
2. Lift the rear of the vehicle and support the frame
on jack stands to unload the suspension compo-
nents. The vehicle is lifted high enough when the
beam ends are off of the saddles. All jack stands
must be of sufficient strength and rigidity to
safely support the vehicle. Do not perform any
work on or around a vehicle that is supported
solely by a lifting device.
Inspect the walking beam for cracks or other
damage. If damage is found, replace the walking
beam.
Keep the vehicle supported by the jack stands
for the next operation.
3. Manipulate the walking beam so that a microme-
ter, vernier, or dial caliper may be used to deter-
mine the wear area thickness on the bottom
face. See Fig. 7. Measurements should be taken
a minimum of 1/2 inch from the beam flange
edges to eliminate any edge wear that may have
occurred. Subtract the wear area thickness (see
Fig. 7, Ref. B) from the thickness at the non-
wear area (see Fig. 7, Ref. A) to determine the
amount of wear.
If the beams show any wear greater than 0.062
inch (1.5 mm), a Chalmers wear plate must be
installed, or the walking beam must be replaced.
4. Rotate the restrictor cans 360 degrees and visu-
ally inspect the cans for cracks, severe corro-
sion, and distortion. If any of these conditions are
present, or the restrictor can is missing, replace
the restrictor can.
WARNING
Replace all cracked or missing restrictor cans.
Failure to do so could lead to loss of vehicle con-
trol, which could result in property damage, seri-
ous personal injury or death. Vehicles with
cracked or missing restrictor cans may be driven
08/16/96
f320453
A
1
A. Measure height here.
1. Left Forwardmost Axle Stop
Fig. 6, AirLiner Axle Stop Measurement
09/27/95
f320432
1
A
B
A. Non-Wear Area B. Wear Area
1. Walking Beam
Fig. 7, Walking Beam End Wear Thickness
Suspension32
Century Class Trucks Maintenance Manual, July 199932/4
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