Saab SONETT III Service Manual page 104

During the alignment check, the car must be unladen and
standing on a flat, horizontal floor, as otherwise measure-
ments will not be reliable.
All adjustment with shims must be kept within reasonable
limits. Deformation resulting from crash damage, etc.,
must be corrected by thorough realignment of the chassis.
Distorted control arms must be rejected and new ones
fitted.
For checking wheel alignment there are various standard
tools, which are fitted either to the rim or directly on the
stub axle. Tool handling is described in the instructions
for each individual tool.
NOTE
When using axle-fitted tools on cars with a front-
wheel drive, the wheels must stand on turn-tables
or similar devices and should be locked with the
brakes during the course of the check.
MAX. PERMISSIBLE DISTANCE BETWEEN LOCK NUT AND
THREAD RUN-OUT
FRONT-WHEEL ALIGNMENT
Toe-in
Viewed from above, the wheels should have a certain
relationship to each other, expressed as the difference
between dimensions A and B, measured rim-to-rim at
axle height. See fig.
The setting is called toe-in when dimension A is less than
dimension B. When A is greater than B, the wheel setting
is referred to as toe-out.
Toe-in or toe-out is expressed in inches or millimeters,
being — as stated — the difference between the two
measurements A and B. If the wheels are parallel, so that
there is neither toe-in nor toe-out, the difference will
be 0.
The correct setting is 0.04 ± 0.04 in. (1 ± 1 mm) toe-in,
i.e. B—A = 0.04 ± 0.04 in. (1 ± 1 mm) ± 0.04 in. (1 mm).
Dimension A should be 0.0-0.08 in. (0-2 mm). less than
dimension B.
Checking and adjustment
1. Roll the car slowly straight ahead on a level floor and
stop it without using the brakes. Do not move the car
backwards again.
2. Check the measure A using the special measuring rule,
between the edges of the rims at axle height. Make a
scribed mark at the measure points. Move the car
forward until the scribed mark comes in axle height
again. Check measure B.
If adjustment is called for, alter the lenght of the tie-
rods.
3. Back off the locknut on the outer end of the tie-rod.
4. Tum n the tie-rod with the aid of a pair of pliers to right
or lett, and search until obtaining the right toe-in, see
table.
NOTE
If the rubber boot is so tightly clamped that it accom-
panies the tie-rod when turned, the clamping ring
must first be slackened a little.
If the toe-in is correct, and when both wheels are point-
ing straight ahead, the two tie-rods should be of equal
length, or else be so set that the wheels have the same
amount of clearance from fenders and wheel houses when
turned hard right or hard left. Check also that the spokes
of the steering wheel are horizontal when the wheels are
centered. Remember to tighten the tie-rod lock nuts af ter
adjustment.
NOTE
After adjustment of toe-in, the measurement A must
on no account exceed 1.0 in. (25 mm)..
For tie-rods opposed to each other, the difference
between the measurements "A" must not exceed
0.08 in. (2 mm).
Nov. 1972
SAAB
601-2