I have a b7300 with a La 271 loader on it. It has a bad leak that I cannot seam to fix. The local dealers told me that it was a discontinued item. I did find a dealer in a different town that found me a seal kit that i ordered and replaced the o-ring that appears to be leaking and it did not hold. I have been working on this on and off for 1 year and I have had it. I'm thinking of replacing the control valve. The problem is that i do not know what specifications the new model must meet to replace mine. I have seen different gpm etc. on different models. I also would like to find one that might bolt right up. Mine is a double spool with one handle if that helps. I will take any advice. Thank you in advance.