'83 brake problem

imported post

I have a 1983 Interstate with 36,000 miles. I rebuilt the rear brake caliper last winter and did not test ride until this spring. First trip out the I discovered the caliper was not releasing as it it should. I felt this problem was developing for a long time which is why I rebuilt the rear caliper. I removed the caliper and everything seemed perfect. I then did a search on this forum and learned about the plugging of the return port in the master cylinder. I then removed and rebuilt the rear master cylinder. I put everthing back on the bike and attempted to bleed the system with a vacuum bleeder starting with the right front caliper. I was unable to pull any fluid thru the right front caliper. I ended up removeing that caliper and rebuilding it and also removing the master cylinder and and bench testing it. Both calipers and the master cylinder reinstalled and again I tried bleeding. Still no luck pulling fliud thru the right front caliper. I pumped the foot pedal with vacuun applied. I was able to pump the vacuum bleeder to the pointwhere it would not pump anymore. I then disconnected the brake line from the master cylinder and the right front caliper and tried to blow air from the master cylinder end of the line to the caliper.... nothing. I then blew air from the caliper end was able to push out all the brake fluid with ease. Again I tried blowing air from the master cylinder end with no luck. I have stopped at this point before I put fluid back to see if anyone has any ideas as to why the system flows great in reverse and nothing in the correct direction.



Thanks for your help.