Measurement Of Toe-Out On Turn (Toot) - JOSAM AM34 A Manual

JOSAM laser AM
Measuring system
18
2
54

Measurement of toe-out on turn (TOOT)

Measuring toe-out on turn with the turn angle
gauge AM135.
To check if the angle of the steering arm is correct
or if the arm has been damaged, the toe-out on
turn must be measured.
Some manufacturers determine the toe-out on turn
by turning the inner wheel to 20° and then taking a
reading on the outer wheel. Some determine the
toe-out on turn at the maximum turn.
Hang the frame gauges, gauge extensions and
measuring scales.
Jack up the front axle.
Attach the wheel adapter and laser projector.
Compensate for run-out of the wheel with the
adjustment knobs on the adapter.
Place the turn angle gauges AM135 on the floor for
both the left and right sides, with a centered scale
and in the middle of the wheels.
Put the left wheel on left-steered or the right wheel
on right-steered vehicles in a straight ahead posi-
tion with the laser projector. Equal values on the
front and rear measuring scales.
Position the turn angle gauges on both sides with
the laser dot on the 0-line of the measuring scale.
Turn the inner wheel 20
Then check the angle of the outer wheel on the opposite
side. Position the laser dot on the measuring scale.
Aim the laser dot on the scale and read the value.
Example: left wheel:
right wheel:
Difference:
Write down the value on the Test Report Sheet and
calculate the toe-out on turn.
Repeat the procedure on the opposite side.
The maximum allowed difference is 0.5° (30´ )
between the left and right sides.
°
outward.
°
20 (outward)
°
18 (inward)
°
2
17,5
2,5