If they had, the workshop mechanics would have had fewer excuses for reversing over the pumps.

I don't do it all that often, but I think you can hear the air as you press on the front of the car and the fluid moves from front to back.

If I have my doubts I just drain and refill. My unit only takes 20 pumps from empty to full.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

When I was trying to remove the air I would let it down with an air chuck and a hose into a jar, when it stops blowing bubbles as you let it down you know all the air is out of the system.
It usually took about 4 to 6 goes at filling it till I was happy.

That's just ingenious Doc. Lucky I don't live 5 minutes from Minisport. It would be like buying handbags and shoes with the missus.

Then you could use the clutch master cylinder as a hydro pump and you could sit in the drivers seat while you pumped it up.

Thanks everyone