We ran AC motor/gear pumps for years and years ( without a diaphrame) and
never had a failure.
----- Original Message -----
From: "TeriAnn Wakeman" <twakeman@cruzers.com>
To: " FOT" <fot@autox.team.net>
Sent: Thursday, November 01, 2001 8:30 AM
Subject: AC fuel pumps - Prone to failure??
> Bill Babcock wrote:
>
> > I don't agree with TeriAnn about the TR3 mechanical
> > pump being ideal. It's prone to failure.
>
> Bill what kinds of failures have you been seeing?
>
> Rover ran the same AC fuel pump (different mounting flange though) on
> it's series Land Rovers. I've put over a half million miles on my 1960
> Land Rover since I bought her in 1978.
>
> During those 23 years, I've had two diaphram holes, no valve failures and
> no other failures on the pump. Diaphram holes result in a lower volume
> and lower pressure pumped but it will still pump enough to get you home.
> Just not under full throttle.
>
> Last Winter I rebuild the TR3's fuel pump because it was not deliveing
> enough fuel for full throttle operation. There was a small tare in the
> diaphram. It is the first time I had to do more than clean the sediment
> bowl since I purchased the car in 1986.
>
> Personally I'm not seeing anything I would call unreliable and the
> failure modes I have experienced left the vehicle drivable if one were
> careful.
>
> I have seen other people having failures with the later style AC pump
> that has the valves crimped into place. The failures resulted from too
> little crimping allowing the valve to fall out.
>
> I would like to learn about the failures you and maybe others have
> experienced that make you think the AC mechanical pump is prone to
> failure. Personally over 90% of the fuel pump failures I personally have
> expereinced have been with electric pumps.
>
>
> TeriAnn Wakeman If you send me direct mail, please
> Santa Cruz, California start the subject line with TW -
> twakeman@cruzers.com I will be sure to read the message
>
> http://www.cruzers.com/~twakeman
>
> "How can life grant us the boon of living..unless we dare"
> Amelia Earhart 1898-1937
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