Steve
did you use the double lip seal? If not don’t worry about it. The single seal should last 20 years.
I had sent this out some time ago.
The Original front seal behind the flywheel is an Onan 509-0040. (The rear seal is an Onan 509-0041). The 509-0040 crosses to a National 470162R or SKF11806.
Those are a single lip Viton seal.
I found a double lipped seal that should be much better than the original single lip. It is made of Nitrile rubber which is better than Viton for this application.
CR SKF 11801 (CR = Chicago Rawhide)
I got it at a local bearing supplier but it was a Harwal box.
1.187 x 2.000 x .437
Type: BDL Material: NBR
BDL = Double Lipped
NBR = Nitrile Rubber
It fits right into the opening when tapped into place.
I greased up the lips and the outer metal of the seal and then used a piece of 1-1/2” pipe (OD=1.9”) to drive in the new seal until it seated.
The double lipped seal would help prevent leakage at the seal. Especially if the old single lipped seal has worn a tiny groove into the shaft.
For a discussion on the difference between a Viton seal and a Nitrile Rubber seal see:
http://www.easternseals.co.uk/viton-fkm-vs-nitrile/ http://www.easternseals.co.uk/viton-fkm-vs-nitrile/
Emery Stora
emerystora
>
> Hi Emery -
>
> Thanks for your advice on the Onan crankshaft seal... I got it squared up.
>
> No leaks !!
>
> So... I prolly should send you some ebay gift certificates - but I didn't get that email
>
> SW
>
>
> --
> Steve W
> 1973 : 23'
> Southern California
>
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