Section XII. SPRINGS AND SHOCK ABSORBERS
4-96 Spring Seat and Bearings
Description of Springs
This section provides organizational maintenance information on:
a. The springs (fig. 4-30) are the semielliptic-type with twelve leaves held together by a center bolt and
two large leaf clips. The center bolt end is peened over its hex nut to prevent it from coming loose. The
four leaf clips, two riveted to the fourth leaf and two to the seventh leaf, are closed at the top by hex-head
bolts which pass through clips and clip spacers.
b. The center of the springs seat in, and are clamped to the spring seat assemblies which are secured to
each end of the trunnion tube. Each end of the spring seats in spring guide brackets secured to the axles.
c. A U-bolt on each side of each spring holds the springs in position on the spring seat assemblies. The
U-bolts fit over a spring saddle on top of the springs, down the side of the springs, and through the spring
seat assemblies. The U-bolts are secured with Iockwashers and nuts.
a. Removal. Position semitrailer on level surface with front end resting on landing leg. Jack up each rear
axle so wheels on side from which spring is to be removed can be taken off. Place jacks or hydraulic dolly
under trunnion cross tube and take up weight. Block up rear corners of body frame with support stands or
support by overhead crane. Remove wheels (fig. 4-24); then remove springs by following procedures shown
b. Disassembly (fig. 4-66). Generally springs will not be disassembled into separate leaves for replacement
of broken leaves.
(1) Leaf clips (1) and (5) with associated rivets (2), nuts (3) and bolts (4) can be replaced if necessary.
(2) Center bolt (6) and nut (7) can also be replaced if necessary.
c. Cleaning, Inspection and Repair.
Cleaning solvent (Fed Spec PD-680) is toxic and flammable. Use solvent
only in a well-ventilated room. Avoid prolonged breathing of solvent vapors.
Keep solvent away from flame. Do not use solvent in excessive amounts.
(1) Cleaning. Clean mud and dirt from parts of spring with water and stiff brush. After mud and dirt
have been removed, clean each leaf with dry cleaning solvent (PD-680) (item 18, Appendix C).
Brush or buff rust and corrosion from leaves.