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6-4
REAR SUSPENSION
CHASSIS SUSPENSION
(202)
to outer end of the upper control
arm.
The
threaded ends of the upper pivot pin seat in
internally threaded hardened steel bushings
mounted in outer end of upper control arm.
See figure 6-3.
BUSHING
SEAL
4'
FIniNG
LOWER PIVOT PIN
_.
LOWER CONTROL
AR~
Figure 6-3-Steering Knuckle Support Pivot Pin.
The eccentric type steering knuckle support
upper pivot pins provide adjustment for both
caster and camber. The threaded pin and bush-
ings permit adjustment of caster by turning
the pin, which moves the upper end of knuckle
support fore or aft, depending on rotation. The
large diameter threaded middle section of pin
is eccentric to the ends so that camber is also
changed by turning the pin. A hex recess is
broached in one end of pin for insertion of the
adjusting wrench after removal of the lubrica-
tion fitting from the clamped type pivot pin
bushing.
See figure
6-3.
Rubber seals are installed on lower control
arm shafts and on lower and upper
pivot
pins
to exclude dirt and water from
the t
hreaded
bearing surfaces.
Lubrication
fittings
are pro-
vided at all bearing locations.
The steering knuckle is attached to knuckle
support by a hardened steel king pin which
is
locked in knuckle support by a tapered
pin.
Bronze bushings in steering knuckle provide
bearings for king pin. Vertical thrust is taken
Figure
6-4-Steering
Knuckle, Wheel Bearings and Hub
by a ball bearing between the steering knuckle
and knuckle support. The steering knuckle spin-
dle supports the wheel hub with two New De-
parture adjustable cup and cone ball
bearings.
The outer end of hub is closed
by
a cap and
inner end is sealed with a packing to
exclude
dirt and water from
bearings.
See figure
6-4.
6-3 REAR WHEEL SUSPENSION
Rear wheels are not independently sprung
since they are mounted on axle shafts incor-
porated in the rear axle
assembly.
The rear
wheels are held in proper alignment with each
other by the rigid construction of the rear axle
housing. They are held in alignment with the
rest of the chassis by the torque tube and radius
rod between car frame and the
r
ear axle as-
sembly.
On
Series
40 and 1949 S
eries
50-70, two coil
type chassis springs are mounted between the
Figure
6-5-Rear Wheel
Suspension-Series
40
&
1949
Series 50-70
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