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Re: [T3] master cylinder conversion


On 15 Dec 99, at 10:13, work wrote:

> So, I went for the 1967 dual circuit master cylinder to replace my single.
> 
> To complete the installation, I inserted a T-fitting in the hose from the
> resivor to branch out to the cylinder.  After installation and fighting with
> the bleeder valves, I bleed the brakes.  It took a while, but I got good
> pressure on the back brakes.  The front brakes are a different story.  I
> bleed them but had very little pressure when I released the valve and after
> trickling about 1/2 the fluid out of the resivour I assumed the air was out
> of the system. 

By "good pressure" I assume you mean that you got good flow/pressure 
out of the bleed valves on the back wheels, but not out of the front 
wheels. If this is what you meant, then you need to find, and fix, 
the reason that you aren't getting flow to the front wheels.

There might be a problem any number of places, but if it is poor on 
BOTH front wheels then there is probably a problem in some common 
spot. The only common spots that I can think of are where the fluid 
enters the MC. Perhaps the input hose, or the Tee, or rust/dirt in 
the "new" MC inlet point.

I'd disconnect one of the steel lines from the MC to one of the front 
wheels and work forward or back, depending on the results. See if 
there is good flow right out of the MC. If so, the rubber lines may 
be deteiorating and may just need to be replaced
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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