I order this part for my machine because it was acting up from side to side but this was not the part I needed.  It turned  out to be a bad wire in the cable from the control box up to the head.  I bought this from the SII store for $816.00  I'm trying to get some of my money back because, I do not need it.

Genuine SWF X-Motor Set (Type 103H71226-2853).

Part # 15100000T000

**Full Set required for machines manufactured before 2002.**

Known Machines: Full size single heads.