Tmoose
Mechanical
- Apr 12, 2003
- 5,633
I looked at a few online manuals for wheel alignment equipment from the 70s and newer.
Bear here - clamp and go.
This 1970s SnapOn manual just says attach the gage to the cleaned, machined wheel hub face.
This Windows 95 vintage Snap on aligner has runout detection on page 57, but it says "(.75°-1.5°)" is "not enough to influence the alignment results." But on a 185-75-14 inch tire 1/8 inch toe-in at the tread is less than 0.5 degrees.
Tru-Line has a runout correction procedure - page 13 here
I think using wheel features, especially steel wheel, or (gasp) tire features without establishing a true rotating CL brings potential errors greater than a typical toe-in tolerance whether done on an alignment rack or in my driveway.
Dan T
Bear here - clamp and go.
This 1970s SnapOn manual just says attach the gage to the cleaned, machined wheel hub face.
This Windows 95 vintage Snap on aligner has runout detection on page 57, but it says "(.75°-1.5°)" is "not enough to influence the alignment results." But on a 185-75-14 inch tire 1/8 inch toe-in at the tread is less than 0.5 degrees.
Tru-Line has a runout correction procedure - page 13 here
I think using wheel features, especially steel wheel, or (gasp) tire features without establishing a true rotating CL brings potential errors greater than a typical toe-in tolerance whether done on an alignment rack or in my driveway.
Dan T
