freightliner COLUMBIA CL112 Maintenance Manual page 70

Suspension
5. If the axle stop measurement is not correct, see
Group 32 of the Columbia
for adjustment procedures.
6. Apply the parking brakes, and remove the
chocks.
Chalmers Suspension
1. Chock the front tires, place the transmission in
neutral, and release the parking brakes.
2. Power wash the suspension, or clean it with a
hard-bristle brush before performing a visual in-
spection.
3. 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.
4. 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.
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.
5. Manipulate the walking beam so that a microme-
ter, vernier, or dial caliper can be used to deter-
mine the wear area thickness on the bottom
face. See Fig. 8. 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. 8, Ref. B) from the thickness at the non-
wear area (see Fig.
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.
6. Rotate the restrictor cans 360 degrees and in-
spect the cans for cracks, severe corrosion, and
distortion. If any of these conditions are present,
or the restrictor can is missing, replace the re-
strictor can.
Columbia Maintenance Manual, February 2010
® Workshop Manual
8, Ref. A) to determine the
A
09/27/95
A. Non-Wear Area
1. Walking Beam
Fig. 8, Walking Beam End Wear Thickness
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.
32–02 Suspension Lubrication
Front Suspension
Wipe all dirt away from the grease fittings (if
equipped) on the spring-eye bushings. Apply multi-
purpose chassis grease with a pressurized grease
gun until old grease is forced out.
NOTE: Service Schedule IV vehicles equipped
with a 12,000 lb (5452 kg) front axle are fitted
with maintenance-free rubber bushings, and do
not require lubrication.
32
1
B
f320432
B. Wear Area
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