22
Measuring SAI:
When measuring SAI, the Brake Pedal Depressor (TR-31) must be installed, so the wheel does not
rotate
.
Note:
If the car has power brakes, run the engine while performing this procedure.
1)
Hang the TR-30 the left front wheel clamp to measure camber, caster and SAI.
2)
Install brake pedal depressor and lock brakes so they do not rotate. With power brakes start
the engine to install brake pedal depressor.
3)
Release the pin on the turntable. This allows the wheel to pivot, or turn, freely.
4)
From a straight-ahead position, turn the wheel
out
20 degrees. (Use the scale of the
turntable to confirm swing.)
5)
Rotate the gauge left until the SAI scale (on the left side) is zeroed. (Note that there is a
right
and a
left
“zero” position of the scale; both of which are on the bottom half of the SAI
scale.) Lock the TR-30 in place using the thumbscrew, which is located just below the
scale. Do not turn the camber calibration screw, which is on the vertical bar of the TR-30.
6)
Turn the wheel
in
a total of 40 degrees, or until the wheel is 20 degrees
in
on the scale of
the turntable.
7)
Take the reading on the SAI scale; record and compare it to factory specifications.
8)
Repeat process on the right front wheel.
Note:
When performing step 4, rotate the wheel
right until the SAI scale (on the right side) is zeroed. For
all
of the other steps, follow the
same
procedure.
Note:
Any and all adjustments to caster or camber must be made before measuring toe.
Left
+
Right
+
0
0
16
16
8
8
SAI
Caster Adjustment
0
6
6
