Brake drag - fixed!

[John Lagnese]

Expensive, but happy ending!

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
On Behalf Of Richard van der Hoff
Sent: Friday, August 05, 2011 6:55 AM
To: quattro at audifans.com
Subject: Re: Brake drag - fixed!

Hi folks,

[sticking brakes on a 1984 200]

Just wanted to report a successful conclusion to this tale. We sourced a

new MC from http://www.quattrocorner.com/. The old one, upon removal, 
turned out to be full of rusty gunk, so that was a definite improvement.

The old brake fluid looked as though it had been there a couple of 
decades...

We also found that one of the rear calipers was seized (and given the 
state of the pads, must have been that way for some time...) so we ended

up replacing that with a rebuilt unit too.

At the end of all that, the brakes are working great! We took it for its

MOT (annual inspection) yesterday, and it just failed on a couple of 
minor things like headlight aim and tyres, so we're really hopeful that 
with another half-day of fettling the old girl will finally be 
road-worthy again :).

Best

Richard



On 04/07/11 15:34, Richard van der Hoff wrote:
> Thanks everybody for advice so far...
>
> Huw: certainly the fan was blowing away (the resistor pack had
> disintegrated, so currently it's jury-rigged to jet-engine or
> nothing...). But the failure mode is that there was about a 50/50
chance
> of the brakes sticking on after you released the pedal - as opposed to
> an incremental increase in drag, which is what I'd expect from
> brake-fluid expansion.
>
> cobram: good tip on checking if it's one or all wheels. It certainly
> felt like all of them (it was jammed on pretty hard!). I was just
> parking up so didn't get a chance to see what happened when I took it
> for a drive... it's not really road-legal atm!
>
> I'm still thinking a good starting place is a new or rebuilt MC...
> obviously that will give me a chance to flush out the old brake fluid
> and check the rubber brake hoses carefully.
>
> Any listers on this side of the pond got any recommendations for
> suppliers? I was given the name of a guy with a warehouse full of
> quattro parts, but damned if I can remeber it now. Incidentally, my
> etka's dead - anyone able to tell me which models shared an MC?
>
> Richard
>
> PS: and yes, T44s arrived here in 1983 :).
>
>
>
>
> On 03/07/2011 20:29, Huw Powell wrote:
>> '83 in Europe, '84 in US.
>>
>> And IIRC, people have reported this before and blamed heat from the
>> radiator fan causing expansion of brake fluid?
>>
>> Huw
>>
>> On 7/3/2011 1:17 PM, urq wrote:
>>> ... there was no T44 in '83 ... I believe '85 was the first year for
>>> the T44
>>> ...
>>>
>>> The behavior you describe sounds more to me like moisture in the
brake
>>> system ... which may well have damaged the brake M/C. I'd recommend
that
>>> you try replacing the brake fluid to see if it makes a difference.
>>>
>>> I'm not so sure what the problem with rebuilding brake M/C or wheel
>>> cylinders would be ... assuming you can buy rebuild kits. As long as
the
>>> pistons and cylinder bores aren't damaged a rebuilt M/C should be
safe.
>>> Most of the parts you will find will likely be rebuilt anyway ...
and I
>>> think I'd trust my rebuild over many of the ones available in the
>>> stores.
>>> If you don't trust your skills you can find a local rebuilder who
can
>>> rebuild your M/C.
>>>
>>> Steve Buchholz
>>>
>>> -----Original Message-----
>>>
>>> Recently acquired a 1983 Type 44 200. It seems that once it gets
warmed
>>> up, the brakes start sticking heavily. You can get them to release
by
>>> jabbing at the brake pedal a bit, but they'll soon stick again.
>>>
>>> I seem to recall this is a symptom of a bad master cylinder. I also
seem
>>> to recall that the received wisdom is that rebuilding the MC is a
false
>>> economy - is that right? (I'm afraid I'm not gunning for longevity
here
>>> - it needs to last a few months and then the interesting bits will
get
>>> lifted for spares for a quattro).
>>>
>>> Thanks for help,
>>>
>>> Richard
>>>
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