Re: [DML] Brake saga........

[Todd Nelson <tan5732@xxxxxxx>]

I recently rebuilt all four of my calipers, replaced the master cylinder and 
installed new SS lines as well.  When I went to bleed the brakes the first 
time I used the standard pump and bleed technique, after that the pedal 
simply dropped to the floor, so something had obviously gone awry in the 
bleeding process.  I talked to a mechanic friend of mine and he lent me a 
bleeding tool he made with an old reservoir cap with a schrader valve (like 
the valve on tires).  He would connect a low pressure manual tire pump to 
this to build up pressure in the reservoir (not too much!).  Then you simply 
run around to all of the calipers (in the right order) and open the bleed 
screw until solid brake fluid comes out.  You might want to have someone man 
the reservoir to make sure it doesn't run empty and to work the pump once 
and a while to keep the pressure built up.  I ran the process once and the 
brakes worked great after that.  So bottom line I think you are having a 
problem bleeding the system.  You should also bleed the master cylinder, I 
did this by making sure the master cylinder was level with fluid in the 
reservoir, then I would loosen the two brake lines and let some fluid run 
out.  You can also connect a couple short hoses to the ports and run those 
into the full reservoir and pump the peddle a few times to rid of any air. 
Just try and make sure the MC is level throughout the process.

Good Luck,
Todd Nelson
1561, Vermont


----- Original Message ----- 
From: "basfe25" <dmcman73@xxxxxxxxxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Tuesday, September 27, 2005 9:13 PM
Subject: [DML] Brake saga........


> Ok, a while ago I posted that I was having front brake problems. A
> reminder: Master cylinder is brand new, front calipers are rebuilt and
> all lines are new. The only difference in the car is the fact that I
> have the SS braided brake lines rather then the old rubber ones.
>
> For the life of me....I can't get my front brakes to work!!! Rear
> brakes work great but the fronts just won't clamp down and grab. At
> first I though it was a defective Master cylinder so Rob at PJ Grady
> exchanged it for me, still no luck. I next thought that maybe I didn't
> rebuild the front calipers properly so I purchased a pair that were
> rebuilt professionally, still won't work. I have gone through 6
> bottles of brake fluid trying to bleed the system......still WON'T
> work. Again, back brakes work great but the front won't work.
>
> I've used compressed air in the system to see if there was blockage
> and there wasn't, air moved through it freely with no restrictions. I
> then connected my compressor to the end of the brake line that
> connects to the master cylinder and shot some air in it, front brakes
> grabbed the rotor tight.
>
> What in the heck could it be???? I have tried to power bleed it,
> gravity bleed it, brake pedal pump bleed it you name it! Maybe I am
> not doing it right? I've rebuilt brake systems before on 8 other cars
> and none ever gave me a problem like this. This is the most basic and
> simple setup I have ever worked on.....can anyone help?
>
>
>
>
>
>
>
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