[s-cars] Power steering pump resistance?

[McCall, Randy]

Aaron,

I wasn't aware that serpentine belts used retired people on pensions for
bearings - I can certainly see why they would wear out as old as they
must be; but I'll assume that's just an amusing typo ;-) 

After just finishing up a t-belt R&R this past weekend due to a failed
water pump, I can tell you that the PS pump on my 95.5 S6 turns with
relatively light resistance - I believe its a piston pump, so perhaps
one of the valves controlling pentosin flow is not functioning correctly
in your pump (although pentosin is not a compressible fluid, so I'm not
completely sure about how pressure is acheived - spring loaded
checkvalves?). In any case even with the pulley removed, the pump flange
was relatively easy to move through a rotation, and I can't recall any
portion of the rotation cycle that was high resistance (clear
compression areas in the pulley rotation cycel are there, but not at
high resistance).

-Randy
95.5 S6A

Date: Wed, 28 May 2008 08:20:46 -0700 (PDT)
From: Aaron Ryba <aaronryba at yahoo.com>
Subject: [s-cars] Power steering pump resistance?
To: s-car-list <s-car-list at audifans.com>
Message-ID: <207244.24888.qm at web51410.mail.re2.yahoo.com>
Content-Type: text/plain; charset=us-ascii

O-holy S-list,

I am trying to troubleshoot why I am prematurely wearing down serp belt
pensioners/bearings.

Can anyone tell me what kind of resistance if any should be expected on
rotating a power steering pump by hand (all hooked up with fluid, belt
off, etc.)?

I am getting some significant resistance for about 60 degrees of
rotation.

TIA
Aaron Ryba
95 S6



      

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