Hendrickson 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 rubber bushing ends. Replace the
torque arm if there are gaps between the rubber
bushing and the pin or the outer steel sleeve, if
either bushing end contacts a torque arm pin
mounting bolt, if there are cracks in the bushing,
or if part of the rubber bushing extends beyond
the outside diameter of the outer bushing sleeve.
Chalmers Suspension Inspection
Chock the front wheels to prevent the vehicle from
moving. Place the transmission in neutral and re-
lease the spring or driveline brakes before inspecting
the rear suspension.
Power wash the Chalmers rear suspension or clean
it with a hard-bristle brush before performing a visual
inspection.
1.
Visually inspect the rubber bushings for cracks or
other damage.
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.
If equipped with optional shock absorbers, check
for worn, broken, or damaged shock bushings,
heavy corrosion on the shock absorber body, or
fluid leaking from the shock absorber. Replace
the shock absorbers if any of these conditions
are found.
3.
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.
Visually 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.
4.
Manipulate the walking beam so that a microm-
eter, vernier, or dial caliper can be used to deter-
mine the wear area thickness on the bottom
face. See
. Measurements should be taken
a minimum of 1/2 inch (13 mm) from the beam
flange edges to eliminate any edge wear that
may have occurred. Subtract the wear area
thickness from the nonwear area to determine
the amount of wear.
If the beams show any wear greater than the
allowable 0.062-inch (1.5-mm) wear, a Chalmers
wear plate must be installed, or the walking
beam must be replaced.
5.
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.
09/27/95
f320432
1
A
B
A. Non-wear Area
B. Wear Area
1.
Walking Beam
Fig. 7, Walking Beam End Wear Thickness
Suspension
32
Business Class M2 Maintenance Manual, August 2015
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