I am replacing some clutch parts. The tractor is split and I'm trying to remove the release bearing. I can't get it to come off the end of the release bearing holder and I can't tell if it is just stuck with rust and dirt or is there still something attaching it to the holder that I am unable to see from the front. Lots of the other parts were stuck, rusty, packed in dirt or all three. I'm afraid to use much force without knowing for sure. Any information or suggestions will be very welcome. Thanks.