The diphragm travel on SU type pumps should be set by screwing in the
diaphragm until the contacts don't 'throw over', unscrewing until they just
do, then unscrewing another 1/4 turn (4 holes). An air leak on the suction
side can cause a noisy pump.
PaulH.
----- Original Message -----
From: Enrique Claure <spanlab@ceibo.entelnet.bo>
To: <mgs@autox.team.net>
Sent: Sunday, May 28, 2000 5:23 AM
Subject: Fuel pump very noisy
> Hi list, I got my stubborn fuel pump to work. I had to disasemble the head
> because it would not move. I unscrewed the the head and loosend it. It now
> works but it makes a lot of noise. Seems that I'll have to sightten it a
> bit more. Are these fuel pumps pretty silent? more like a hum? Enrique
>
>
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