Chevrolet 30 Series 1967 Service Manual page 133

Fig . 6 - Stop Screw Adjustment
top from a vertical position.
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 betweer
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/cam ber shims used.
Measure 10-30 Series caster and camber as follows
(refer to Figure ):
8
Caster
1. Measure frame angle
ure .
8
Both angle adjustments are
'B" at location shown in Fig-
F ig . 7 Front End Alignment
Check caster angle on alignment machine.
2.
3.
Add angle "B " and caster angle to determine frame
corrected angle.
4.
Measure dimension "A."
5. Using dimension M A" and the caster-cam ber chart
for the appropriate vehicle, shown below, find the
recommended caster angle.
.
6 The frame corrected angle, Step 3 above, should cor­
respond to the recommended angle on the chart with­
in ± 1/2°. Make changes as necessary to bring
caster angle within limits.
Camber
1. Determine vehicle
machine.
2. Measure dimension "A."
3. Using dimension "A" and the caster-cam ber chart
for the appropriate vehicle, shown below, find the
recommended camber angle.
4. If the angle in Step 1 does not correspond to the rec­
ommended angle on the chart within ±
necessary changes.
Shims may be changed at either front or rear to vary
caster, or at both points equally to vary camber (fig.
I Beam Axle Models
On I beam axles, if camber angle does not fall within
specified lim its, the axle center or steering knuckle is
bent; if the axle center is bent, refer to Front Axle Re­
pair later in this section; if the steering knuckle is dam­
aged, replace as outlined under Steering Knuckle/Steering
Arm later in this section.
the use of tapered shims placed between the axle spring
seat and spring. To increase caster, place thick end of
shim toward rear of vehicle; to decrease caster, place
thick end of shim toward front of vehicle.
Toe-In
Toe-in is the amount in fractions of an inch that wheels
are closer together in front than at rear.
FRONT SUSPENSION 3-5
camber angle on alignment
/ °, make
1 2
Caster angle is adjusted by
Check steering
CHEVROLET TRUCK SERVICE M ANUAL
).
1 0