Product review (5 stars): Just the ticket!!!
Exact fit for the Centennial washer.  After running the diagnostic program on the machine, it indicated a faulty actuator.  Once this was installed in about five minutes, the thing worked PERFECTLY.  Reviews online about the washer pointed out that this part is often a problem.  As a note: while you have the guard off the belt in order to replace this part, tighten the nut for the pulley if needed.  Apparently this can come loose in time.