I am looking at picking up a 2001 BX2200 and on my first inspection of the tractor I noticed the rear hydraulic fill cap has been replaced with a short galvanized pipe nipple with pipe cap, the Kubota cap is not there. Has anyone seen this before and is it something to be concerned about? One of my concern is if the pipe threads are different from the Kubota original threads they will be all buggered up and a new cap would likely not go back in the fill. Any other concerns with this I am missing?