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CHASSIS SUSPENSION
FRONT SUSPENSION
6-3
"N'·
~
.
LOWER CONTROL ARM
~
SPRING
KNUCKLE SUPPO RT
-
Figure 6-2-Lower Control Arm and Shaft Assembly
Figure 6-1 -Front Wheel Suspension
The lower control arm assembly consists of
two drop forged steel arms solidly riveted to a
stamped steel spring seat to form a rigid V-
shaped unit. A small plate riveted above the
spring seat serves as a mounting for a rubber
bumper and a point of connection for the stab-
ilizer link. Hardened steel threaded bushings
are screwed solidly into the inner ends of the
forged arms to provide thread-type bearings
on the ends of the control arm shaft which is
attached to the frame front cross member. A
large threaded pivot pin held
by
a lock washer
and nut connects the steering knuckle support
to the lower control arm. See figure 6-2.
A large threaded hardened steel bushing is
screwed solidly into the lower end of each
steering knuckle support to provide a thread-
type bearing on the pivot pin in outer end of
lower control arm. The
upper
end of knuckle
support provides for a threaded, clamp type
pivot pin which connects upper end of support
6-2 FRONT WHEEL SUSPENSION
The front wheel suspension allows each front
wheel to rise and fall, due to change in road
surface level, without appreciably affecting the
opposite wheel.
Each wheel is independently connected to the
frame front cross member by a steering knuckle,
steering knuckle support, lower control arm
assembly, and an upper control arm on the
shock absorber. See figure 6-1. The upper and
lower control arms are so placed and propor-
tioned in length that they allow each knuckle
support, spindle, and wheel to move through a
vertical plane
only.
The front wheels are held
in proper relation to each other for steering by
means of two tie rods which connect to steer-
ing arms on the steering knuckles and to the
pitman arm on the steering
gear.
A coil type chassis spring is mounted be-
tween the frame front cross member and a
spring seat in each lower control arm assem-
bly. A large rubber bumper is mounted on the
outer end of each
lower
control arm to limit
travel of the arm during compression of chassis
spring. A similar rubber bumper is mounted
on the frame under each upper control arm to
limit travel of arm during rebound of chassis
spring.
Side
roll of the front end of chassis is
con-
trolled
by
a spring
steel stabilizer
sh
aft. The
shaft is
mounted in rubber
bushin gs
supported
in brackets
attached to lower
flange
of
each
frame side rail.
The
ends of stabilizer shaft
are connected to the front sides of lower con-
trol arms by links which have rubber grom-
mets at both ends to provide
flexibility
at the
connections and prevent rattle. See figures 6-1
and
6-15.
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