Looks like you have it assembled correctly. Can only re-iterate the bleeding procedure. If the front seal is working properly, it should work.
1) compress piston.
2) seal outlet
3) release piston
4) release seal on outlet
5) repeat
This should draw fluid into the space between the two seals and then into the space above the front seal. Even if the front seal is not working at all - like your old bad seal or even missing - you should draw fluid into the bore. Releasing the piston increases the trapped volume, so either air or fluid has to fill the increase. If the inlet hose has fluid in it and it does not fill with fluid, the air has to come in from somewhere else. You know the rear seal works, so the above procedure has to work unless there is some huge air leak. Your finger is replacing the one way valve action usually provided by the front seal. If the reverse problem has occurred, i.e. the seal is sealing tight in both directions, sealing the outlet after the piston is compressed should keep the piston from returning all the way to the extended position due to the vacuum.
Hopefully with the above information you can determine what the problem is. With no line on the master and using your finger, the master should fill very quickly and completely in just a few strokes.
1) compress piston.
2) seal outlet
3) release piston
4) release seal on outlet
5) repeat
This should draw fluid into the space between the two seals and then into the space above the front seal. Even if the front seal is not working at all - like your old bad seal or even missing - you should draw fluid into the bore. Releasing the piston increases the trapped volume, so either air or fluid has to fill the increase. If the inlet hose has fluid in it and it does not fill with fluid, the air has to come in from somewhere else. You know the rear seal works, so the above procedure has to work unless there is some huge air leak. Your finger is replacing the one way valve action usually provided by the front seal. If the reverse problem has occurred, i.e. the seal is sealing tight in both directions, sealing the outlet after the piston is compressed should keep the piston from returning all the way to the extended position due to the vacuum.
Hopefully with the above information you can determine what the problem is. With no line on the master and using your finger, the master should fill very quickly and completely in just a few strokes.