MTS 709 Alignment System - Manual (Page 103)

Angular Adjustments
709 Alignment System Alignment Wizard 103
If the Y coordinate is positive
1. Initially loosen A180.
2. Tighten A0 until the Y coordinate reading is slightly negative.
3. Tighten A180 to bring the adjustment back to an Y coordinate reading of
0; or as close to 0 as practical.