I agree that it probably does not do a lot, but I think the oil seal does
serve two functions.
1) It still does tend to keep engine oil in the engine. There is a small
port on the engine side of the diaphragm
which will let oil out of the pump body.
2) If the diaphragm leaks the gasoline might run into the crank cast and
cause problems. The seal will help keep
most of the gas out and let it spill out the port instead.
-Tony
Message text written by "Fred Thomas"
>
> I have an original TR4A fuek pump I'd like to rebuild. I saw in the moss
online
> catalog that the rebuild kit does not include the rubber gasket for the
diaphragm shaft.
> Is this true? Mine is ruined and needs to be replaced. Does anyone
know
a source for these parts?
>
> -Tony
==========================================================================
It's not needed as it really does not do anything, just a small rubber
gasket that goes over the pivot arm, oil still goes up into the fuel pump
as
always, the main diaphram is waht pumps the gas and keeps the oil in the
lower chamber, this gasket never did anything. "FT"<
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