MAHLE RTI Laser 4 - Manual (Page 7)

Page 6
COMPENSATING WHEEL RUNOUT (Laser 4)
Wheel Clamps must be adjusted to compensate for wheel
runout. This adjustment is made using the three Wheel
Runout Adjusting Knobs.
1) Raise wheel and tire from turning gauge or rear wheel
slip plate. Turn wheel so the large wheel clamping
knob is at the top (12 o’clock position).
2) Mount the Spirit Level Gauge on the Wheel Clamp.
(See Figure 9) Center the magnet on the Wheel
Runout Compensating Adapter. Turn the Spirit Level
Gauge so it is level.
3) Zero the Caster Spirit Level using the adjusting knob
on the bottom of the unit.
4) Rotate the wheel so the wheel clamp adjusting knob
is at the 2 o’clock position. Turn the Spirit Level
Gauge so it is once again level. Note the amount of
movement of the bubble away from zero.
Repeat at the 4, 6, 8, and 10 o’clock positions. Re-
level the Spirit Level Gauge at each position.
5) Turn the wheel to the position where the largest
movement of the bubble was observed. Turn the
Runout Adjusting Knobs to decrease this reading by
one-half. Zero the Caster Spirit Level and repeat step
4, checking for the largest movement of the bubble
away from zero at each of the six positions.
6) The wheel clamp is properly adjusted when the
bubble does not move away from zero at all six
positions.