This is a New 13gpm MCV /power steering pump for IH 786 through 1586 tractors and also 3088 , 3288 and 3688. This high volume pump will work on older series tractors and make them steer much better than the original 9gpm pump ,but the flow control orifice must be enlarged. ( Email for details) I also offer a new 9 gpm mcv pump for direct replacement for the older tractors Check out my store for other IH hydraulic related parts. I have over 25 yrs. experience of rebuilding IH tractor and motors and have many parts available . Email your questions and I can probably help you.