[s-cars] Bleeding Pressure from the hydraulic boost system

[Jerry Scott]

I replaced my o-ring years ago and as I remember it failed again 2 years later.  I have heard that removing about .001 in. ( don't take off too much) off the bottom of the plug, with a grinder will fix the problem.  It allows more clamping force on the new o-ring.  Jerry

-----Original Message-----
From: S-CAR-List [mailto:s-car-list-bounces at audifans.com] On Behalf Of Larry
Sent: Tuesday, September 06, 2016 6:57 PM
To: Tony
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Bleeding Pressure from the hydraulic boost system

Not looking to bleed the system. As you put it, it pretty well (at the point of the X-plug on the pump) will "self" bleed since its at the top of the system. The issue is, so long as the pressure accumulator (a.k.a. B_mb) is functioning correctly, opening ANY part of the system (rack, pump, booster, b_mb, lines) will cause very high PSI green gold (CHF 11S) to spew out, potentially with enough force to cause serious injury. So it's a REQUIREMENT to bleed off system pressure before opening the system, which in my case is to replace the O-ring under the X-plug.


Sent from my pocket electronic thingy

> On Sep 6, 2016, at 8:09 PM, Tony <tony.curran at sympatico.ca> wrote:
> 
> Hi Larry,
> 
> I believe the power steering hydraulics is self leveling. Just have to turn on and let it run for a while. 
> 
> Can someone else chime in if it's different.
> 
> Cheers,
> 
> Tony
> 96 S6
> 
> -----Original Message-----
> From: S-CAR-List [mailto:s-car-list-bounces at audifans.com] On Behalf Of Larry
> Sent: September-06-16 6:54 PM
> To: s-car-list at audifans.com
> Subject: [s-cars] Bleeding Pressure from the hydraulic boost system
> 
> I'm in need of replacing of my hydraulic pump's X-plug.
> 
> How do I bleed off the system pressure before removing the old O-ring.  Pump the brake pedal until the pedal goes hard?
> 
> LL-NY
> 
> Sent from my pocket electronic thingy
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