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20-20
GROUP
20-MAINTENANCE OPERATIONS
been adjusted to specifications.
Equipment Installation. Equip-
ment used for front wheel alignment
inspection must be accurate. If port-
able equipment is being used, per-
form all inspection operations on a
level floor.
Alignment height spacers (Figs. 44
and 45) are used to check caster and
camber except on GT. The spacers
should be omitted when checking
toe-in.
1. Drive the car in a straight line
far enough to establish the straight-
ahead position of the front wheels,
and then mark the steering wheel hub
and the steering column collar (Fig.
43). Do not adjust the steering
wheel spoke position at this time.
If the front wheels are turned at any
time during the inspection, align the
marks to bring the wheels back to the
straight-ahead position.
2. With the car in position for the
front end alignment inspection and
adjustment, install the alignment
spacers as follows to establish th.::
curb height.
Insert the pin in the spacer hole
marked for the model being checked.
Raise the front of the car and
position the alignment spacers be-
tween the suspension upper arm and
the spring tower as shown in Fig. 44.
The lower end of the spacer should
be placed over the head of the ball
joint front outside attaching rivet.
Position the alignment spacers for
the rear of the car between the rear
axle and the side rail as shown in
(Fig. 45).
3. Install the wheel alignment
equipment on the car. Whichever
type of equipment is used, follow
the installation and inspection in-
structions provided by the equipment
manufacturer.
Caster. Check the caster angle at
each front wheel.
The caster is the forward or rear-
ward tilt of the top of the wheel
spindle. If the spindle tilts to the
rear, caster is positive. The spindle
tilts to the front, caster is negative.
See Part 3-7 for the correct caster
specifications. The maximum differ-
ence between both front wheel caster
angles should not exceed
f
0
•
How-
ever, a difference of not more than
!
o
is preferred.
Camber. Check the camber angle
at each front wheel.
Camber is the amount the front
ALIGNMENT MARKS
FIG. 43-
Straight
Ahead
Position Marks -
+
3
Typical
Tool -
3000- A
or
B
FIG. 44-
Alignment Spacers
-
Front
CASTER ADJUSTMENT
FIG. 45-
Alignment Spacers-
Rear
wheels are tilted at the top. If a
wheel tilts outward, camber is posi-
tive. If a wheel tilts inward, camber
is negative. Correct camber specifi-
cations are given in Part 3-7. The
maximum difference between both
front wheel camber angles should not
exceed
to
.
However, a difference of
not more than
!
o
is preferred.
Toe-In. Before attempting to
check toe-in, remove all the align-
ment spacers. Toe-in should only be
checked and adjusted after the caster
and camber have been adjusted to
specifications. Check the toe-in with
STRUT
FIG.
46-
Caster
and
Ca.mber Adiustments
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