m900 project

[utopia]

Originally Posted by Capo

Once again it see this.
With the lever pulled, the system is sealed from the reservoir, no way for any air to escape, it may get dissolved and will come out of solution as soon as the pressure on the lever is removed and the piston retracts, note that if air is dissolved it will do so throughout the fluid and not just the bit at the top.

I don't know whether the air could go into solution in the brake fluid at higher pressure or not, but I have experienced similar effects in water (due to heat and/or pressure) in a previous employment testing and developing valves.
But assuming that it could, then could it be that the air is then free to mix throughout the entire fluid in the system, rather than being trapped in little nooks and crannies, high spots etc.......?
If so, on releasing the pressure, some of this dissolved air will now reappear in places where its easier to bleed out. ........???
Just a thought.
Then again, although it is claimed to work, I've never really needed to use it much myself so I couldn't say. But it is a widely held claim.
Personally, I might be inclined to remove the clutch slave cylinder from the cases and hold it higher than the master cyl, so the air can rise to the top more easily, then bleed it in that position. Careful with that lovely new paint though.