

| Subject: | Re: Air in Brake Circuit |
| From: | Michael A. Radtke |
| Date: | Mon, 15 Dec 1997 08:09:07 -0700 |
Thanks, all of you who responded to my note.
I have not gone back to the problem yet, but I have spent some time considering what you all have written.
1) Bleeding. The technique that I used was two person:
a) Hose from bleeder into jar with some brake fluid in it. The hose
below the surface to show bubbles, and to stop air from entering.
b) Open bleeder / depress brake pedal / close bleeder / slowly release
brake pedal. Repeat ...
I do believe that pressure bleeders and other such aids offer
convenience, but I can't see how they would be an improvement over my
technique as far as effectiveness or reliability.
2) Bench bleeding. Well, this is a weak spot, I must admit. I did a
minimum of this before I installed the master cylinder just to lube the
parts since the fluid leaks out anyhow. I didn't re-bleed the master in
the car either since plenty of fluid was being pumped. Both the rear
and front circuits pumped out all the old discolored fluid and got to
new clear fluid.
3) Air leak. I have no doubt that there is an air leak. The problem is
that I can't figure out just where.
I will wet the reservoir connections with brake fluid to see if the leak
is there.
Any other air leak that I have has to act like a check valve. I have no
fluid leaks. Yet the front system is full of air. Perhaps another
clue. If I pump the pedal a few times and then release it, I definitely
can hear sound from the master cylinder of air squirting around in
fluid.
Both front wheels act exactly the same. If one slave cylinder was
admitting air, wouldn't one bleed differently from the other?
In summary, I do believe that my brake bleeding technique is OK. What I
need is advice on how to find the air leak.
Still asking for help,
Mike
Michael A. Radtke - Z74 Voice: 602-862-4897
Bull FAX: 4853
13430 N. Black Canyon Hwy.
Phoenix, AZ 85029 Email: m.radtke@bull.comHave something to add on this topic today? Revive this thread in the forum »