[Vwdiesel] squishy brakes?

[mark shepherd]

It is a little ambiguous, but I latched onto the rapid pumping using up the 
vac, and this resulting in a firm, but hard to actuate pedal. A bit like 
repeated pumping with engine off IMO.

Mark
...Bill where's that Quantum ;o)


----- Original Message ----- 
From: "Patrick Dolan" <pmdolan at sasktel.net>
To: "mark shepherd" <mark at shepher.fsnet.co.uk>
Cc: "vw fans" <Vwdiesel at vwfans.com>
Sent: Tuesday, August 03, 2010 9:21 PM
Subject: Re: [Vwdiesel] squishy brakes?


>
> We don't have enough information.  If the pedal is going down as vacuum 
> dies off (possible) but not all of the way to the floor, it would be as 
> you suggest.  If it keeps on going, hydraulic.   Also possibility of both 
> systems in trouble.
>
> ----- Original Message -----
> From: mark shepherd <mark at shepher.fsnet.co.uk>
> Date: Tuesday, August 3, 2010 1:38 pm
> Subject: Re: [Vwdiesel] squishy brakes?
>
>> Slow sinking does signify a slight leak, but the running out of
>> pedal power,
>> is a sign that the vaccuum pump is not replenishing vaccuum fast
>> enough. On
>> the Mk2  setup that could be either low oil in sump , or faulty
>> [chipped or
>> sticky] vanes  in the pump. Attach a vac gauge in 'boost/servo' line.
>>
>> Mark
>>
>>
>> ----- Original Message ----- 
>> From: "Will Taygan" <william at taygan.com>
>> To: <vwdiesel at vwfans.com>
>> Sent: Tuesday, August 03, 2010 7:00 PM
>> Subject: [Vwdiesel] squishy brakes?
>>
>>
>> >
>> > I'm wondering if I have a vacuum leak?  94' 1.6TD FrankenJetta
>> > (originally gas).  Pedal sinks if pushed slowly.  Works great if
>> pushed> quickly.  Lots of pumping leads to a nice hard pedal but
>> with very very
>> > little braking power.
>> >
>> > Bled rear brakes, no effect (although the right parking brake
>> cable was
>> > stuck on - I've got new cables on order, although i suppose it
>> *could*> be that rebuilt caliper I put on last year)  Front brake
>> bleeders are
>> > stuck/rounded.  Power lock vacuum is working fine.  Couldn't
>> find any
>> > obvious leaks between the vac pump and the brake booster.  I put
>> some> RTV silicone around the grommet at the brake booster, just
>> in case that
>> > might help.
>> >
>> > Ideas?
>> >
>> > Thanks,
>> >
>> > Will in Alaska.
>> >
>> > P.S. I'm thinking about just pulling this engine and putting it
>> in the
>> > '82 diesel Westy, but I gotta figure out how much work that
>> actually is
>> > first..  Winter is coming!
>> >
>> > _______________________________________________
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>> > Vwdiesel at vwfans.com
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>> >
>>
>>
>>
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>
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