[V8] well lets beat this brake acumulator to death again

[Ed Dekker]

Dave,
My hydraulic pump failed as you describe except that the wobble plate broke 
rather than a poppet valve sticking open..  The hydraulics trade calls this 
a "wobble pump' as an off-axis plate acts as the connecting rod.  The 
wobble plate broke where one piston was attached.  Repair failed and we 
replaced the pump.  Maybe find a used pump?

Ed Dekker
90 V8 Graphite
97 V6 Avant Pearl

----- Original Message ----- 
From: <dsaad at icehouse.net>
To: <v8 at audifans.com>
Sent: Tuesday, March 15, 2005 10:44 AM
Subject: Re: [V8] well lets beat this brake acumulator to death again


> WAG O THE DAY:
>
> I can't quite imagine how the brake section could fail completly - but as
> I
> recall, this is a plunger type pump - so maybe one of the poppet valves
> under
> the X caps is stuck open? If this is true then either some junk is
> floating
> around in the system and got stuck in the valve or the valve just failed.
> Neither seems likely to me but the thing to do is pull the pump and tear
> it
> down. What you find there will dictate the next step.
>
> If a line is plugged, it would have to be a serious plug. I think this
> pump
> makes around 3000 to 5000 PSI.
>
> What about the brake servo? How does that work?
>
>
> Dave
>
>
> Quoting R Broberg <rbroberg at wi.rr.com>:
>
>> My recollection is that the pump provides two separate services. One
>> higher
>> pressure than the other, for brakes and steering.  Presumably, one can
>> fail
>> without the other.
>> Roland
>>
>> Roland Broberg
>> Broberg Engineering-BECO
>> Delafield. Wisconsin USA
>> ----- Original Message -----
>> From: "Kneale Brownson" <knotnook at traverse.com>
>> To: <readytow at earthlink.net>; <v8 at audifans.com>
>> Sent: Monday, March 14, 2005 4:25 AM
>> Subject: Re: [V8] well lets beat this brake acumulator to death again
>>
>>
>> > Sounds like either the pump's internal plumbing or the hose to the
>> > accumulator is plugged somehow.  You might check the banjo bolt for the
>> > bomb hose to see if it has a screen plugged.
>> >
>> > At 07:09 PM 3/13/2005 -0800, kevin kyzar wrote:
>> > >to all who answered, thank you. in respones to your questions, the
>> > >power
>> > >steering works fine, the vehicle had been idled w/o the belt
>> > >installed.
>> but
>> > >the belt is now installed.  i pulled the "X" plugs on the front of the
>> pump
>> > >and verified the eccentrics in the pump are moving.  but still nothing
>> > >on
>> > >the brakes.  and with the belt installed, and the motor idling, no
>> > >fluid
>> > >from the pump to the bomb.  I'm stumped!
>> >
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>> >
>>
>>
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>
>
>
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> contributions welcome!
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