freightliner Argosy COE Maintenance Manual page 72

Suspension
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.
Inspect the forward and rear spring brackets for
wear, cracks, and other damage. If any of these con-
ditions exist, replace the damaged bracket(s). See
Group 32 of the Century Class Trucks Workshop
Manual for instructions.
WARNING
Replace worn, cracked, or damaged spring
brackets. Failure to do so could result in bracket
breakage, possibly leading to loss of vehicle con-
trol and resulting in personal injury or property
damage.
Inspect the crossmember(s) and gussets for wear,
cracks, and other damage. If any of these conditions
exist, replace the damaged parts. See Group 32 of
the Century Class Trucks Workshop Manual for
instructions.
IMPORTANT: Before checking the AirLiner sus-
pension height, make sure there is no load on
the chassis, and the trailer is unhitched.
1. Park the vehicle on a level surface, using a light
application of the brakes. Do not apply the park-
ing brakes. Shift the transmission into neutral,
and build the secondary air pressure to at least
100 psi (690 kPa). Shut down the engine.
2. Mark the location of the front and rear tires on
the floor, and chock the tires on one axle only.
3. Check the length of the overtravel lever between
its pivot points. See
3.1 If the vehicle is equipped with an adjust-
able leveling valve, the length should be
8 inches (203 mm). If the length is incor-
rect, See Group 32 of the Century Class
Trucks Workshop Manual for adjustment
procedures.
3.2 If the vehicle is equipped with a fixed lev-
eling valve, See Group 32 of the Century
Class Trucks Workshop Manual for the
Century Class Trucks Maintenance Manual, July 1999
Fig. 5, Ref. A.
4
5
05/15/95
A. Measure the length of the overtravel lever between
these two points.
1. V-Shaped Mark
2. Adjustment Locknut
3. Overtravel Lever
Fig. 5, AirLiner Overtravel Lever and Linkage Rod
Measurement
overtravel lever length for the rear axle
installed in your vehicle.
4. On single-drive rear axle configurations, measure
the distance from the bottom of the left axle stop
to the top of the U-bolt pad. On tandem (dual-
drive) rear axle configurations, measure the dis-
tance from the bottom of the forwardmost left
axle stop to the top of the axle U-bolt pad. See
Fig. 6, Ref. A. The correct distance for single
and dual-drive rear axles is between 2-3/8 inches
and 2-7/8 inches (60 to 73 mm).
5. If the axle stop measurement is not correct, See
Group 32 of the Century Class Trucks Workshop
Manual for adjustment procedures.
6. Apply the parking brakes, and remove the
chocks.
Chalmers Suspension
Chock the front tires to prevent the vehicle from mov-
ing. Place the transmission in neutral, and release
the parking brakes before inspecting the Chalmers
rear suspension.
Power wash the Chalmers rear suspension, or clean
it with a hard-bristle brush before performing a visual
inspection.
1. Inspect the rubber bushings for cracks or other
damage.
32
A
1
2
3
f320410
4. Cotter Pin
5. Linkage Rod
32/3