Master is from a 74 Mav, manual disc (1in bore). Many have used the master with good results. There is no facyory residual valve in this master. The explorer rear has both bleeder screws pointing down. The cobra calipers up front have one pointing up and the other pointing down.
Just bled the front right which had the bleeder pointing down, It had a ton of air. Did the left front which had a little as well. It's a little better but not safe. I checked the right front again and found more air. There must be an internal leak somewhere. After double checking the rear calipers, the bleeder points out not down. I left those alone since they were just bled recently.
Are they at the 'top' of the caliper or at the bottom? They need to be higher than the caliper pistons to bleed properly.
Man I hate to sound like a broken record, but I thought the very same thing about a leak, make sure the bleeders are at the top and bleed then reinstall.
ok you said the front right has the bleeder pointing down? this is your problem. the bleeders have to be in the highest point on the calipers hydraulic system. take the caliper off. put something between the pads that is at least as thick as the rotor. turn the caliper into a position with the bleeder at the highest point. then bleed the brakes. then put the caliper back on.
just read the earlier posts. you need to switch the rear calipers on the rear to get the bleeders on the top. it sounds like you have a drivers side caliper on the passenger side and need to get a passenger side caliper. if thats not possible then do as i said above.
I stuck a piece of wood in between the pads. The odd thing was I removed all of the air from the side that had the bleeder pointing down and moved on to the driver side. Removed the air from that side and went back to the side with the bleeder pointing down and it had air in it again. When I removed the air I submerged a hose attached to the bleeder with brake fluid so I could see the air bubbles come out.
you have to bleed from the furthest caliper away from the M/C first, which is the RH rear, then LH rear, RH front and finally the LH front....good luck!
Sounds like you are making good progress! If you are looking at purchasing a really good bleeder kit, this is the one I use. http://www.summitracing.com/int/parts/mvp-0252/overview/ probably can get cheaper, I got mine not too far from you, www.SkywayTools.com in Chico, CA. this thing works great and you don't have to keep on checking/filling M/C!
And I even went that route also lol, I made my own, ran a clear hose from my carb vacuum into the lid of a jar, ran another hose from the jar to the bleeder, started the car and instant vacuum pump, still had all the issues you describe, finally bled the calipers with the bleeder screws at the top and I had brakes! I also went through 5 MC, looked for leaks, tightened everything up, drove me crazy for over a week.
