Hofmann Pro42, Operator'S Manual

Page: 27 / 66

Chapter III Operation
Runout Compensation
Compensating for the amount of runout of the
wheel assemblies is an important factor in the
alignment process. If not correctly determined,
there may be errors in the displayed camber
and toe angles.
The Aligner calculates the plane of the rear
wheel assemblies by measuring variations
in toe and camber during a four position
360-degree rotation of the wheel.
The left rear wheel compensation is taken 9,
6, 3 and 12 o’clock. The right rear wheel is
taken at 3, 6, 9 and 12 o’clock.
Front wheels with targets are compensated by
rotating the assemblies forward 25 degrees,
then rearward 25 degrees from vertical, then
back to the vertical position.
NOTE:
If the display monitor is not visible for
position indication, watch the blinking LED(s)
on the Pod during runout. As each of the four
positions are initiated, the runout indicator LED
begins blinking slowly. The blink will increase
in speed as the proper position is approached.
The LED will stay on continuous when the
proper position is achieved. When runout
has been measured, the LED will again begin
blinking indicating to the operator to proceed
to the next position.
To begin wheel runout compensation, begin
by raising the vehicles rear wheels off the
alignment rack surface using jacks or other
method to allow the wheels to rotate freely.
NOTE:
Jacks should be rigid and not
allow movement during the compensation
procedure.
NOTE:
Runout always begins with the left rear
wheel followed by the right rear, then the right
front target, the left front target will be last.
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