Master Cylinder problems

["Bruce Moxon" <bamxn@triad.rr.com>]

  Just purchased a TR250 after a 20 year absence with Triumphs.
  I rebuilt the master cylinder and have tried to bleed the brakes to no
avail. I am able to flush the air out of the rear brakes but get no air out of
the front brakes.I also noticed that I am getting fluid flowing back into the
mc on the front brakes.Does this have something to do with the tipping valve ?
When reinstalling the tipping valve, should it be behind the primary plunger ?
Any help is appreciated.

Bruce Moxon
CD7158LO