Brake drag

[Richard van der Hoff]

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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