Pro-Cut VBG640, Technical Manual, Page: 23 / 46

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Ø23
MACHINING ROTORS
STEP 3: COMPENSATE FOR LATERAL Run-out
(1 Minute)
CONTINUED
Note: you may notice a circular motion in the lathe body parallel to the vehicle centerline. This ‘scrubbing’ mo-
tion up and down is not harmful in any way.
If you notice that the dial indicator does not make an even back and forth motion like a windshield wiper, this
may be an indication of another problem. There may be foreign matter behind the rotor, causing a wobble, or
there may even be a driveline part that has been damaged. You will not be able to totally eliminate the runout if
it is not an even once per revolution sweep. Causes from lathe setup can include:
· Loose dial indicator or gooseneck
· Dial indicator tip is on an uneven surface or edge
· Loose dial indicator tip
· Vise-grip attached to a loose part on the vehicle
· The lathe is not fully engaged to the adapter
· The adapter is not fully seated
· Run-out screws were not backed off before you began.
· The lug nuts are loose on the adapter
Uneven motion can indicate other vehicle problems and warrants further investigation if one of the issues listed
above is not the problem.