Hi Eugene, there are many things that can get out of order on KA DWs that keep them from working at their peak level.
Be sure that the lower arm is turning fast enough, we always saw a lot of KA DWs where the lower arm was slow, you can slightly bend the outer tips of the arms to angle the outer jets for better propulsion.
But you have to keep in mind that KA DWs do not have guaranteed wash temperature and the main wash cycles are too short, this is why WP, GE and MT all out performed any KA 21 series DW in the 80s.
John L.
Be sure that the lower arm is turning fast enough, we always saw a lot of KA DWs where the lower arm was slow, you can slightly bend the outer tips of the arms to angle the outer jets for better propulsion.
But you have to keep in mind that KA DWs do not have guaranteed wash temperature and the main wash cycles are too short, this is why WP, GE and MT all out performed any KA 21 series DW in the 80s.
John L.