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Yesterday I was mowing the yard and noticed that the 1872 began BILLOWING black smoke.  It turns out the front (PTO end) crankshaft seal is toast.  It sprayed almost all of it's oil all over inside the muffler-box.

 

[ATTACH=full]18908[/ATTACH]

 

After removing the PTO, I was able to spin this seal in the bore on the engine case.  You can see the marks on the face of the seal where I used a couple of small picks to pull the seal out of it's bore.  It came out very easily.

 

As you can see, this seal is encapsulated in rubber.  Two questions come to mind:

 

1) What caused this seal to loosen up in it's bore... Is the bore somehow damaged, (it looked fine) or does the rubber on the outside edge of this seal break down?

 

2) What can I do to keep this from happening in the future?  If it was a standard seal with a steel casing, I'd probably grease up the outside with some JB-Weld or Hi-Temp RVT before installing it.

 

Any thoughts are greatly appreciated.  As you can tell, this is my first go around with one of these.


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