I have found a couple threads that describe a leak in the main body of the control valve on a 1533. There seems to be a small hole on the underside that is about 3/16 in diameter and hydraulic fluid started leaking out of it. According to the posts there was a rivet in that location that breaks off and a leak results. Can anybody post a picture of the offending hole or a drawing from a repair manual that shows the rivet? There seems to be a service bulletin that say to drill the remained of the rivet out, tap the hole and put a bolt in there. I contacted 2 dealers and direct to AGCO and none could give me the info. I just need to know if the broken rivet issue is my problem so I can drill and tap rather than trailer the tractor 150 miles to a dealer.