TM 9-2320-211-20
on the frame side rails, and aline the mounting
(b) Using overhead hoisting equipment,
screw holes in the plate and side rails.
remove the fifth wheel from the vehicle.
(b) Insert the six screws in the holes in the
(3) Installation.
(a) Lift the fifth wheel into position on the
plate and side rails, and install the six safety nuts
and deck plate clamps on the screws. Tighten the
spacers bolted to the frame side rails, and aline the
screws and nuts.
mounting screw holes in the subbase and spacers.
2-229. Fifth wheel assembly--M246 Model
the holes in the subbase and spacers, and tighten
a. General. F i f t h w h e e l c o m p o n e n t s o n the
them. Insert the four screws through the holes in
tractor-wrecker (M246 model) include a fifth wheel
the subbase and spacer, install the four safety nuts
and approach plates which are part of the crane
on the screws, and tighten them.
body. The fifth wheel is bolted to both the crane
(c) Lubricate the fifth wheel in accordance
body side rails and the frame side rails.
w i t h LO 9-2320-211-12.
b. Fifth W h e e l .
c. Approach Plate (fig. 2-214).
(1) A d j u s t m e n t . R e f e r t o p a r a g r a p h 2 -
(1) R e m o v a l .
228 b (1), and follow similar procedures.
( a ) Remove the eight screws and safety
(2) R e m o v a l .
nuts, and the two screws and safety nuts securing
(a) Remove the safety nuts (located on the
the approach plate assembly to the frame side rails.
inside of the truck frame side rails) from the eight
(b) Lift the approach plate assembly from
screws, four on each side of the fifth wheel subbase,
the vehicle.
securing the fifth wheel to the crane body side rails
(2) Installation.
and the truck frame side rails. Remove the screws.
(a) Lift the approach plate assembly into
(b) R e m o v e t h e t w o s c r e w s a n d l o c k -
position on the frame side rails, and aline the
washers, one on each side of subbase, securing the
mounting screw holes in the approach plates and
fifth wheel to the crane body side rails.
side rails.
(c) Using overhead hoisting equipment,
(b) Install the two screws and eight screws
remove the fifth wheel from the vehicle.
in the holes in the approach plates and side rails.
(3) Installation.
Install the 10 safety nuts on the screws, and tighten
(a) Lift the fifth wheel into position on the
them.
crane body side rails, and aline the mounting screw
d. Center Deck Plate (fig. 2-215).
hole in the subbase and side rails.
(1) R e m o v a l .
(b) Install the capscrew and lockwasher in
(a) Remove the six screws, safety nuts, and
the center hole on each side of the subbase (into the
desk plate clamps securing the center deck plate to
tapped hole in the side rail), and tighten it.
the frame side rails.
(c) Insert the eight screws in the holes in the
(b) Lift the center deck plate from the
subbase, the crane body side rails, and the truck
vehicle.
frame side rails. Install eight safety nuts on the
(2) Installation.
screws, and tighten them.
(a) Lift the center deck plate into position
(d) Lubricate the fifth wheel in accordance
w i t h LO 9-2320-211-12.
Section XXXIV. MAINTENANCE OF SPRINGS
AND SHOCK ABSORBERS
2-230. General
end and to a hanger at the front end. The pivoting
shackle is secured to a hanger mounted to the
a. Front Spring. Semielliptic, leaf type spring
vehicle side rail. The front hanger is secured to the
assemblies (fig. 2-216) are mounted to both sides of
same side rail. Spring leaves are held together by a
vehicle. Two U bolts and clamp plates secure the
bolt extending through the center of each leaf. Six
front springs to axle. The spring assemblies are
clips hold the leaves in constant alinement.
mounted to a pivoting shackle at the rear spring
