My 1020 is leaking oil out of the flywheel housing. I assume it's the crank seal gone bad since the tractor is almost 50 yrs old. Has anyone done a crank seal on a gas JD 1020? I was hoping to do it without any specialized tools since I can't seem to find a place that rents the seal removal/installer tool. Any tips would be appreciated. I was hoping that a slide hammer attached to the seal with screws would help removal. And was wondering if I could make some type of instillation tool with a large PVC pipe and some sort of mounting plate that I can screw into. Directions mention a cold chisel to remove, but that seems likely to damage the crank sealing surface if not carefull. Should I do the front seal as well even though it's not leaking? or do you think I have another 20 yrs left in that one. I'm not one to mess with something thats not broken.