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BN2 Brake Problem

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stevebn2bj7

Jedi Warrior
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Just getting my BN2 back on the road for the first time in 3 years and am having some trouble getting the brake lines free of air. I have rebuilt or replaced all of the wheel cylinders in the last 6 months. I did not rebuild the master cylinder as it was used about 2 years ago and kept sealed after that time. The problem I have is that I cannot get any pedal after bleeding the system five or six times. There always seems to be air getting in. However there are no leaks or fluid loss anywhere. Is it possible for air to enter the master or have fluid circulating in the master giving the impression of air?

Steve
 
How are you bleeding it? Are you using someone to push the pedal and replenishing the resevoir as you bleed each wheel cylinder, or are you pushing fluid in at the wheel cylinders with a pressure pot (being careful to not overflow the resevoir. I've had better luck doing the latter. I use a small (1 qt) garden spray pump with tubing adapters to fit on the bleed screws at the wheel cylinders. I had to bleed the heck out of it before I got all the air out of mine. It took several sessions and it was especially difficult to keep the threads on the bleed screws sealed while I pumped fluid in. I started with the wheel cylinder furthest (in terms of piping) from the master cylinder and then reversed that sequence because I couldn't rationalize doing it one way or the other. Eventually I got it done. Not a quick job from empty of fluid.
 
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