I think I have found the source of a leak on my D14 and am wondering if anyone can tell me if I have to split the tractor to fix it. It appears that the O-ring on the PTO shift lever is the source of my leak. The previous owner welded an extension on the handle, probably distroyed the O-ring. Can I replace this O-ring without splitting the tractor by going through one of the access ports on the torque tube or due I have to split the tractor. Any help would be appreciated.