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27
F R O N T W H E E L SUSPENSION
General Description
T h e same type of independent front wheel sus-
pension system that was used on previous series
Cadillac and L a Salle cars has been continued on
the 37 series cars.
T h e design of this system,
w i t h its coil springs, integral shock
absorbers,
pivoted suspension arms,
and s t u r d y
steering
knuckle supports, is shown in P l a t e 8.
T h e con-
struction illustrated is t y p i c a l of the 37 series
design.
T h e front stabilizer bar on series 37-50, 60, and
90 cars is forward-mounted as shown in Plate 8,
F i g . 1 and 2.
O n the remaining models the front
stabilizer bar is mounted to the rear of the frame
front cross member.
Series 37-65, 70, 75, 85 and 90 cars have needle
bearings at the top and bottom of the steering
knuckle pins. T h e lighter weight series 37-50 and
60 cars have plain bushings at this point.
Service Information
1. L u b r i c a t i o n
3. C o r r e c t i o n of W h e e l M i s a l i g n m e n t
T h e threaded bushings of the front wheel sus-
The following factors should be checked and put
pension system require thorough lubrication, w i t h
in proper setting, in the order given, when testing
the weight of the car off the bearings, every 1,000
the wheel alignment of any car.
miles.
W h e n lubricating these parts, therefore,
the
„.
Tir
f
P ^ s s u r e - C h e c k i n g
and
inflating
the
front end of the car must be lifted w i t h a j a c k
f
t i r e s
t
o
t
h
e
P
r o
P
e
Pressure is the very first^opera-
placed under the center of the front cross member,
'
l
o
n
o
f
w
h
e
e
l
alignment job.
It is essential
so that the car is supported at the frame, and the
°
f
^
steering good riding, and m a x i m u m t re
front suspension system entirely relieved of weight.
l
f-
Under-inflation alone results iri actual mis-
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alignment, with consequent hard
steering
a n a
T h e front end of the car must be lifted by the
excessive tire friction,
which causes r a p i d and
frame i n order to secure thorough lubrication of
uneven tire wear,
the front suspension bearings.
T h e correct tire pressures, front and rear, for
FRONT WHEEL ALIGNMENT
37 series cars are:
F r o n t wheel alignment is the mechanics of keep-
37-50, 60
26 lbs. m i n i m u m
ing a l l the inter-related factors affecting the run-
37-65, 70
28 lbs. m i n i m u m
n i n g and steering of the front wheels in proper
37-75 85
32 lbs m i n i m u m
adjustment.
Correct alignment is necessary to
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r
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37-90
36 lbs. m i n i m u m
keep the front wheels in their true running posi-
tion and is essential for easy and efficient steering,
.
as well as the prevention of abnormal tire wear.
Wheel
Run-Out—Wheel
run-out should not
exceed
i n . measured at the side walls of prop-
2
I m p o r t a n t W h e e l A l i g n m e n t F a c t o r s
e
r
^ inflated tires.
R u n - o u t should be checked
p
e
w i t h the wheels in place on the car, and should be
1. T i r e inflation.
eliminated as far as possible before checking other
, , .
factors of alignment.
F i g . 6 shows the procedure
2.
Irueness,
balance, a n d t r a c k i n g of both for m a r k i n g high spots on the tire and the manner
front and rear wheels.
i n
w n
i c h the wheels should be positioned when
3. Adjustment of front wheel bearings.
checking caster, camber and toe-in.
4. C o n d i t i o n of shock absorbers.
r
,
,
,
,
Instructions for correction of wheel run-out are
5. Adjustment of steering gear a n d a l l steer-
given on page 141.
ing connections.
6. Caster angle of steering knuckle support.
Wheel Eccentricity—Wheels
and tires should
_
„
.
,
, ,
, ,
. . . .
.
run as nearly concentric as possible w i t h the steer-
7. C a m b e r angle and knuckle pin inclination.
i
n
g
k
n
u
c
k
l
e
s p i n
d l e .
E c c e n t r i c i t y should not ex-
8. Toe-in of front wheels i n straight ahead
ceed tV inch measured at the center line of the
position.
tire w i t h the
wheel mounted on the spindle.
n
~r
_ , ,
,
.
A n y out-of-round condition beyond this l i m i t will
9. Toe-out of front wheels on turns.
t e I
/
d
t Q
c
a
u
s
£
w
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e
d
s
h
i
m
m
y
a
n
d
t
r
a
m
R
a
s
w e l l
10. C o n d i t i o n of a l l bushings a n d bearings.
as excessive tire wear.
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