MAHLE RTI Laser 4 - Manual (Page 13)

Page 12
STEERING AXIS INCLINATION (SAI) READING
(Laser 4)
SAI: The inward tilt of the ball joint or strut at the top
.
Proceed with the following steps to read SAI:
1) With the Spirit Level Gauge mounted on the left front
wheel clamp, turn the left front wheel outward at the
front for a 20 degree reading on the radius gauge. (See
Fig. 24)
2) Pivot the Spirit Level Gauge so that the SAI bubble reads
zero on scale “L”. (See Fig 26)
Note: The bottom scale marked “L” is for the left wheel
and the upper scale marked “R” is for the right wheel.
3) Turn the wheel inward at the front for a 20 degree
reading on the radius gauge. This is a total swing of 40
degrees. (See Fig. 25)
4) DO NOT RE-LEVEL THE ELECTRONIC GAUGE.
5) Read center of SAI bubble for SAI readout. (See Fig. 26)
If the SAI reading is higher than the scale on the gauge, turn
the wheel until an 8 degree reading is reached. Re-adjust the
gauge for a reading of zero and continue turning the wheel.
Add the 8 degrees to the final reading to obtain the actual
SAI reading.
6) Repeat the above procedure on the right front wheel. Use the
scale labeled “R”. (See Fig. 26)