I have a JohnDeere 5310 tractor 4 wheel-drive and I changed hyd. oil and filter and pulled out the screene from behind the tractor cleaned and I started to put the screen back in and put my hand inside housing to clean and I got a short piece of metal it looks like a dowl pin about three-eights inch long round just like a wooden dowel pin , I SEARCHED and could not find where it went nor could I FIND ANYMORE what should I do johndeere don't know what it is and wants 3500. dollars just to start, would I be alright to install a magnet at the back where i found the dowel pin and drive it or what ,does anyone have any idea what this could be and where it came from Thanks holt50