[TR] Fuel pump oil seal

[tom white]

Look in your area for a "Hose shop'.  These place sell industrial hosing to
heavy equipment operators and the commercial marine industry.  They usually
have a wide selection of fuel resistant o-rings and other essential pieces.

Best regards,
Tom

> From: tr3driver at ca.rr.com
> To: triumphs at autox.team.net
> Date: Wed, 19 Mar 2008 15:03:14 -0700
> Subject: Re: [TR] Fuel pump oil seal
>
> > Any experiences with or without this seal?
>
> Angelo, I believe the seal serves two purposes.  The first purpose is
> probably no longer necessary, that of keeping crankcase fumes away from the
> pump diaphragm.  Modern diaphragms now have nitrile rubber in them (in
order
> to withstand modern fuels, which the original diaphragms would not), which
> also makes them more resistant to crankcase fumes.
>
> The second purpose is not all that critical either; when the diaphragm does
> develop a leak, the seal helps keep the leaking fuel out of the crankcase
> (and dripping from the weep hole where it will hopefully be noticed).
>
> I found an old brake rubber in the junk bin that made an approximation of
> the seal, and after a few tries to find a diaphragm compatible with
> "reformulated" gasoline, the result lasted quite well.
>
> Randall
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