Thought I was done

[jlord]

Mac,
You didn't mention the grit of the abrasive used, but from what you say there is a worn spot where the seal lips run. If it's not too deep and is free of rough spots or burrs then the seal should be able to do its job OK.
If there were any burrs on the shaft that the seal has to slide over to get to where it "lives", then that may have caused a little groove or tear on the sealing edge that caused the last one to leak. Sounds like you are taking all the appropriate action and steps needed to address the issue.
Be sure to check to see if there is any axial "play" or movement of the shaft which would indicate a worn bearing. If so, then the shaft might move beyond the range of the elasticity of the seal to do it's job. With the shaft having a grooved and worn section where the seal rides, it wouldn't take much movement to make a leak.
I have successfully chucked-up a worn shaft in my lathe and used my MIG to build up a worn area, then turned it down to factory specs before. That was a piece for my 1936 bulldozer that is no longer available. Any competent machine shop can do this.
Best of luck and hope you have success.

 

[user 19288]

Mac,
You didn't mention the grit of the abrasive used, but from what you say there is a worn spot where the seal lips run. If it's not too deep and is free of rough spots or burrs then the seal should be able to do its job OK.
If there were any burrs on the shaft that the seal has to slide over to get to where it "lives", then that may have caused a little groove or tear on the sealing edge that caused the last one to leak. Sounds like you are taking all the appropriate action and steps needed to address the issue.
Be sure to check to see if there is any axial "play" or movement of the shaft which would indicate a worn bearing. If so, then the shaft might move beyond the range of the elasticity of the seal to do it's job. With the shaft having a grooved and worn section where the seal rides, it wouldn't take much movement to make a leak.
I have successfully chucked-up a worn shaft in my lathe and used my MIG to build up a worn area, then turned it down to factory specs before. That was a piece for my 1936 bulldozer that is no longer available. Any competent machine shop can do this.
Best of luck and hope you have success.

Thanks! I have several different grit crocus, and after radii sing the pin hole enough to guarantee no sharp edges I worked on it a little initially with 240, finished with 600. I’ve plowed and tilled with it since installing the CR seal and doesn’t leak a drop.

 

[jlord]

Mac,

I just knew you would be able to get it squared away. The extra effort is worth it. Seals last longest on really smooth shiny surfaces. Pistons/rings do best with cross-hatched surfaces, seals not so much.