leveling
plate against the pins on the indicator as shown in Fig. 25. This puts the indicator
pointer in a vertical position. With the pointer in this position, move the indicator scale forward
or backward until it reads "0." Then remove the leveling plate. Now, set the wheel in 20 degrees,
place the leveling plate on
the other side of the horizontal bar and slide it slowly along the bar until
its edge contacts both pins on the indicator, Fig. 26. When this is
done the kingpin inclination may be read directly from the Kingpin
Inclination Scale on the indicator.
The correct kingpin inclination should be 4-3/4 degrees plus or minus 1/2
degree.
The kingpin
inclination of the other wheel may be
checked by repeating the operations described above.
When making
the foregoing checks, if the camber check shows the camber to be incorrect
and the kingpin inclination
check shows the kingpin inclination to be correct, this means that
the steering knuckle is bent and must be replaced. On the other
hand, if the kingpin inclination is incorrect, the knuckle support
must be replaced. Naturally,
after replacing a knuckle support it will be necessary to re-adjust both caster and
camber.
TOE-IN
Raise the
car with a jack and place the chalk mark which indicates the point of mean
run-out of the tires in the
horizontal position; then lower the car on the turntables. Set one
wheel so that when it is contacted by
the contact bars the pointer
will indicate "0" on the Toe-In Scale. Fig. 27. Then go to the other side of the car
and contact the tire with the
contact bars. Then read the amount of toe-in on the Toe-In Scale which
should
A".