I have a grease seal that leaked on my Exmark caster. I have an arrow pointed at the seal so you can see what I'm talking about. I bought a seal driver and messed up several trying to get it to go into place. It seems to be very hard to get it started strait. I finally go one in, put it back together and it wants to fall out again. I have searched the web over for instructions on how to properly drive the seal in with no luck. It seem that as soon as I begin to tap on it it start to go in crooked and if I try to straiten it or adjust it it bends. My friend gave me the seals, I'm beginning to wonder if the size is off a little. If someone would give me detailed step by step instructions on how to seat this seal properly I would appreciate it. I'm really out of my element on this repair. Thanks, picture follows. The only Exmark dealer here I trust with the repair is pretty backed up with work. I need to learn this myself if possible. Thanks!