Replaces the worn piston rod for the Binks Humdinger. The rod needs replacement if your old rod has more than .004 inch wear in the middle of the seal area, or if you can catch your fingernail on a vertical grove in the rod.
Not replacing a bad the rod will result in early or instant failure of the packing/seals. This is the piston rod only.
Dont forget the repack kit you will need during replacement of this rod # 41-12815. Make your unit perform like new!