Date:         Thu, 14 Sep 2006 22:18:39 -0400
Reply-To:     Helmut Blong <helmut.blong@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Helmut Blong <helmut.blong@GMAIL.COM>
Subject:      Fwd: Vacuum pump
In-Reply-To:  <450A0A46.7000305@verizon.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Good tips. Thanks.

---------- Forwarded message ----------
From: Mike Collum <collum@verizon.net>
Date: Sep 14, 2006 10:04 PM
Subject: Re: Vacuum pump
To:
Cc: Helmut Blong <helmut.blong@gmail.com>

One more thing, Helmut.

If the brake vacuum booster or a vacuum hose to it fails, your brakes
would just be much less responsive as the "Vacuum assist" wouldn't be there.

Mike


Mike Collum wrote:
> Helmut,
>
> Your sinking brake pedal is due to a bad master cylinder ... not the
> vacuum booster.
>
> They wear their seals so that brake fluid leaks past them "Internally"
> so you won't see a fluid loss.
>
> Mike
> '84 GL 7 pass
> '85 GL Westy
>
>
> Helmut Blong wrote:
>
>> Thanks very much. Since your clever like that, what do you think is
>> the most
>> common cause for a sinking brake pedal? I figure vacuum as I am not
>> losing
>> brake fluid anywhere. It's a long run from engine to brake servo and I'd
>> love to be able to narrow it down to common fault locations in that
>> vacuum
>> line.
>>
>> cheers,
>>
>> mordo
>>
>> ---------- Forwarded message ----------
>> From: Doug <vanagons@cox.net>
>> Date: Sep 14, 2006 9:27 PM
>> Subject: Re: Vacuum pump
>> To: Helmut Blong <helmut.blong@gmail.com>
>>
>> Helmut,
>> Yes, pump is for CC only, just follow the hose over to either the
>> accumulator or actuator.
>> Yes, vacuum from engine is ported through a one-way valve directly to
>> the power brake servo.
>> Good hunting,
>> Doug in CT
>>
>>
>>
>> Helmut Blong wrote:
>>
>>> So, my search of Bentley and the archives seems to bear out that the
>>> vacuum
>>> pump is exclusively for the cruise control on my 90 Carat but I would
>>> like
>>> it if someone on list would confirm this.
>>>
>>> Ken Wilford's excellent posts on CC repair will be helpful when I
>>> finally
>>> tackle that beast.
>>>
>>> Power brake servo uses engine vacuum exclusively?
>>>
>>> cheers,
>>>
>>> mordo
>>>
>>
>