pump->bomb, round 2; overpressure?

Bernie Benz b.m.benz at prodigy.net
Wed May 22 13:57:04 EDT 2002

Opps again!  I ment no relief valve in the PB section of the pump.

Opps! Wrong hose.  Thanks.

The old 5K Bentley shows more detail on the pump and its hoses than does the
200 manual.  It shows that the damper hose, the plastic tube, goes up into
the upper steel tube with the restrictor end, as you called it, being
clamped in position at the coupling between the tube and hose.  Having had
many of thses pumps apart, I don't believe that there is any specific relief
valve in the pump for the PS section.  Maybe pressure is just limited by the
volumeteric efficiency of the pump.


> From: Brett Dikeman <brett at cloud9.net>
> Date: Wed, 22 May 2002 14:53:21 -0400
> To: Bernie Benz <b.m.benz at prodigy.net>
> Subject: Re: pump->bomb, round 2;  overpressure?
> At 11:49 AM -0700 5/22/02, Bernie Benz wrote:
>> There is an overpressure relief valve within the pump that limits the peak
>> output pressure and thus the max pressure delivered to the rack,
>> but it has nothing to do with the normal hose pressure.  Hose pressure is
>> determined soley by the rack's demand for power steering effort.  When
>> steering assist is not in demand hose pressure is near zero with full pump
>> flow capacity thru the rack valving and back to the reservior.  Do you like
>> to hold the steering wheel against the stop while parking?  A big NO-NO!
>>> Last question...which hose does the long end of the plastic
>>> restriction tube go into?  The lower or upper hose?
>> I have not seen this "delux" hose kit of which you describe, and was not
>> aware that apparently, from your description, this replacement kit is a two
>> piece hose sepperable at a middle joint.
> Please re-read the subject line.
> Brett
> --
> ----
> "They that give up essential liberty to obtain temporary
> safety deserve neither liberty nor safety." - Ben Franklin
> http://www.users.cloud9.net/~brett/

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