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Re: [T3] My front brake rotors turn with the pedal applied. HELP!

On 18 Aug 2001, at 12:47, Christopher  Stofer wrote:

> I noted while bleeding the front brakes, I only got a trickle of
> fluid, when the bleeder value was released (both sides).  I thought
> there was something wrong with the MC, so I disconnected the front
> brake line at the flexible hose and pressed the pedal and fluid shot
> across the driveway.  

I think this tells you that everything up to where you disconnected 
is working correctly. That leaves the calipers and/or the flex hoses, 
depending on which side of the flex hose you disconnected.

You might also want to check the bleed valves and just make sure 
that their passageways are clear. These can rust up if the rubber 
caps are left off.

> Could there be a massive amount of air in the 2nd circuit, which would
> not allow the caliper to compress, requiring a ăbench bleedâ? 
> Possibly, my calipers could be frozen, but this seems unlikely that
> both would freeze at the same time and they worked prior to the MC
> conversion.

You did put them back on the same sides didn't you? (bleed valves 
on top?)

> Any help would be greatly appreciated.

Whenever I replace a flex hose I cut off the metal ends and braze 
the female hose ends closed. This gives me caps that I can use to 
cap off any ends that might otherwise connect to a caliper or a 
wheel cylinder.

Using these caps I can bleed the MC and all the lines before I put 
the calipers and cylinders on. This is especially useful if I'm 
switching to DoT-5 silicone brake fluid, as it allows me to flush out 
the system without flushing thru my freshly rebuilt and clean 
calipers and wheel cylinders.

If you do the same thing, you can find out how your system feels 
without the calipers in place. Sometimes this is helpful.

Yes the calipers can be frozen, or the pads might just be rusted in 
place in the caliper. I've seen the latter happen when the pads were 
too tight and they had just been hammered in anyway.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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