Combines Hydralic pump leak on 4400

If its still leaking after replaceing the o-ring then there is a good chance you have a cracked housing.

Your dealer must be mistaken. The teflon you see on your tractor pump is a thin washer that protects the oring as the plug is screwed in. You can get them seperat, or they come in a overhall kit for your tractors hydralic pump. Talk to your part guys. As far as I know, you cannot get them in other sizes.

Thanks for the info, I will check with the parts guy again. Maybe I damaged the new o-ring screwing the plug in. I don't think the housing is cracked, at least if it has a crack in it, I can't see it.