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TRUCK SERVICE MANUAL
TM 5-4210-230-14&P-1
As the spring assembly deflects these leaves come in
contact providing increased capacity and stiffness.
Fig. 5 Progressive Spring Assembly
MAINTENANCE
Lubrication
For lubrication intervals, refer to Operator's
Manual. For types of lubricants recommended, refer to
LUBRICATION, Section CTS-2412.
SERVICING
Although the exact servicing procedures are
different for each type of spring assembly and spring
assembly application, the basic procedures are similar.
The following is a general outline for servicing all spring
assemblies.
Removal
1.
Place floor jack under truck frame and raise truck
sufficiently to relieve weight from spring to be
removed.
2.
Remove shock absorbers where used.
3.
Remover U-bolts, spring bumper and
retainer or U-bolt seat.
4.
Remove
lubricators
(not
used
on
springs equipped with rubber bushings).
5.
Remove nuts from spring shackle pins
or bracket pins.
6.
Slide spring off bracket pin and shackle pin.
7.
If spring is rubber bushed, bushing halves may be
removed from each side of spring and shackle
eye.
Installation
Before reassembly, all shackle bolts, U-bolts, etc.
should be cleaned and lubricated for proper installation.
While the actual installation procedures will vary
with each spring type, the pivot end of spring is usually
fastened to frame bracket first. Shackle end can then
be fastened by aligning shackle to other frame bracket.
When installing U-bolts for securing axles, do not final
tighten until springs have been placed under normal
load. See TORQUE CHART for U-bolt torque
specifications. Spring failures may occur at the center
bolt hole if U-bolts become loosened. These bolts must
be kept tight and checked frequently. Spring pins should
also be checked periodically.
Disassembly
1.
Clamp spring end in vise and remove old bushing
from spring eye.
2.
Reposition spring in vise so that assembly will be
clamped near center.
3.
If bolted type rebound clips are used, remove
nuts, bolts and spacers; where clinch type
rebound clips are used, bend tabs of clips up,
being careful not to break them. Heating clips with
torch will help avoid breakage.
4.
Remove nut from spring center bolt.
CTS-2680S Chapter I Page 4
PRINTED IN UNITED STATES OF AMERICA
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