Chevrolet 10 Series 1968, Service Manual, Page: 143 / 713

FRONT SUSPENSION 3-4
F ig . 3 —Front Suspension—Ch evy Van
Caster and Camber—Figure 5
Positive caster is the amount in degrees of the back­
ward tilt of the kingpin. Positive camber is the amount
in degrees that the front wheels are tilted outward at the
top from a vertical position. Both angle adjustments are
necessary for steering stability and safe vehicle handling.
Coil Spring Models
On 10-30 Series coil spring models, caster and camber
adjustments are made by means of shims located between
the upper control arm shaft and the mounting bracket at­
tached to the suspension crossmember.
A series of concave and convex spacers with flat oppo­
site sides are used. These spherical spacers allow a
positive cross-shaft-to-bracket attachment regardless of
the number of caster/camber shims used.
Measure 10-30 Series caster and camber as follows
(refer to Figure 6):
Caster
1. Using a bubble protrator measure frame angle " B ”
at location shown in Figure 6.
2. Check caster angle on alignment machine.
3. Add angle
“ B ”
and caster angle to determine frame
corrected angle.
4. Measure dimension
“ A .”
5. Using dimension
“ A ”
and the caster-camber chart
(fig. 7) for the appropriate vehicle, shown below, find
the recommended caster angle.
CHEVROLET TRUCK SERVICE MANUAL