yeah i was thinking bench bleeding it before fitting it to the car.
put the master in a vice, grip it where one of the bolts goes through
- fill the resivoir with fluid.
- grab a large philips head screw driver
- gently push the piston in all the way (watch out, fluid shoots out pretty quick)
- before allowing the piston to return, hold your fingers over the ports so that they are pretty much air tight.
- allow the piston to return, you will see the fluid go down and air bubble.
- repeat this several times
then fit the master back to the car and refit the lines.
complete another brake bleed, have some one sit in the car, open the bleed nipple, pump pedal 10 times, close nipple (ensure pedal is still pushed down when you close the nipple)
pump the pedal up hard, while the pedal is being pushed, open the bleed nipple once more, close nipple while pedal is pressed down