Thanks, Paul,
Yes, they are two different types of vents, the one by the base is barbed,
the one on the contact end is smooth. However, the diameters appear to be about
the same. They will be plumbed in. The puzzler, though, is why the SU's on
TD's don't require such vents?
Bud Krueger
52TD
77MGB
Paul Hunt wrote:
> > (1) The new SU pump has what appear to be two small vents, one at the
> base of
> >the body and the other on the electrical cover. Can anyone tell me what
> these
> >are for? Are they to be plumbed in somehow, or are they just superfluous?
>
> Because the pump consists of a diaphragm moving back the air spaces behind
> the diaphragm and in the contact space at the other end of the solenoid
> plunger need to be vented to the air to stop the cavities pressurising and
> adding resistance to the operation of the solenoid and diaphragm. In both
> cases they have plastic tubes routed to the boot/trunk and terminated in
> washer tees. They are secured in the forward lower right-hand corner. On
> my 73 the pipes are of two different diameters, that at the contact end is
> larger and actually fits over the plastic housing for the metal connector,
> rather than the metal connector itself.
>
> PaulH.
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