TRUCK SERVICE MANUAL
Release vise to permit spring leaves to separate.
Remove spring from vise and separate leaves
from center bolt.
Cleaning, Inspection and Repair
Wash all parts in cleaning solvent or use steam
cleaning equipment to remove grease and scale.
Use a wire brush to hasten dirt removal.
Do not immerse rubber spring bushings in
cleaning solvent. Use a non-petroleum base type
rubber lubricant on a clean cloth to wipe these
Inspect all spring leaves for breakage and cracks.
Also compare arch of leaves with new leaves and
if leaves are flattened out, replace.
Spring pins must be replaced if they are worn,
corroded or cracked.
Spring eye bushing and spring shackle bushing
must also be replaced if defective.
Check spring brackets for cracks or for wear
around mounting bolt or rivet holes. Replace
bracket if damaged.
Always use new center bolts at each overhaul.
Lightly lubricate spring leaves with a thin coat of
graphite grease. Place spring leaves in proper
order and align center bolt hole with a long drift.
Compress spring leaves sufficiently for installing
center bolt and nut.
Place spring assembly in vise and compress
spring leaves fully.
When assembling spring leaves, be careful to
prevent physical injury to 1 personnel. The use
of special holding fixtures or "C" clamps for
holding spring leaves in place during assembly
is strongly recommended.
Align spring leaves by tapping with hammer and
position rebound clips on spring. If bolted type
clips are used, install spacers, bolts and nuts.
Tighten enough to hold leaves in alignment but
not enough to restrict free movement. If clinch
type clips are used, bend ends of clips down on
top leaf. Heat clips with torch to help eliminate
Shock absorbers are provided to control body
sway and to eliminate excessive tire wear, front wheel
shimmy and spring breakage. They also improve the
riding qualities of the truck and are especially useful
when the truck is empty or only partly loaded.
The direct acting type shock absorber (Fig. 6),
construction and requires no periodic maintenance.
Shock absorbers of this type should be checked every
16,000 km (10,000 miles) however, to make sure they
are functioning satisfactorily, that bushings are not worn,
and that outer jacket has not been damaged by flying
stones or debris from the road. If a shock absorber is
leaking, fails to operate or develops unusual noises, the
complete unit should be replaced. Direct acting shock
absorbers are nonrefillable and service is limited to unit
Fig. 6 Direct Acting Shock Absorber
MOUNTING AND LINKAGE
Loose, bent or broken shock absorber mountings
or linkage should always be checked for and corrected
when servicing the suspension system. Inspect all
rubber bushings and grommets to see that they
effectively keep metal from striking metal. Link or
bushing wear can be checked by twisting link with pliers
or by prying link connection with screwdriver or small
pry bar. Outward appearance will usually indicate
Some body styles applicable to light or. medium
duty delivery trucks require a stabilizing device in the
suspension system. This unit, known as a sway bar,
supplements the spring by adding greater stability to the
A sway bar is a U-shaped cross bar mounted
transversely with the chassis frame.
CTS-2680S Chapter I Page 5
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