Cap off, leave pedal at top, undo nipple, push pedal down and hold down, do nipple up, pull pedal back up, undo nipple, push pedal down and hold down, do nipple up, pull pedal up, repeat 5000 times until pressure can be felt in pedal with nipple done up. Don't let the reservoir become empty as it does very quickly, use a length of clear pipe attached to nipple with the other end submerged in a glass milk bottle half filled with fluid so you can see exactly what is being pushed through the system and to prevent air being sucked back up through the pipe.