Hydraulic pumps can growl for other reasons besides the pump. A bad rack can
also make a pump growl. Any restriction on the inlet will also cause pump
noise as the fluid aerates under vacuum.
It can also be a bad rebuilt pump! Very common as the core was probably sent
in noisy and they did not find out why during the so called rebuild.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
John Rodgers
Sent: Saturday, July 30, 2011 7:03 PM
To: vanagon@GERRY.VANAGON.COM
Subject: How much noise

  is acceptable in a rebuilt power steering pump? I just installed a new
pump on OL' Red, my 88GL daily driver, and the pump is nearly as loud as the
one I took off the van. The old one was really growling, and the new one is
only a bit better - still loud. This is a Beck/Arnley rebuilt and I've had
good success with that product line, but this particular one sucks!!

Any ideas on what sound levels are acceptable for rebuilt pumps?

Thanks,

John

--
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com