I just installed new wheel cylinders onmy 1992 Cadillac deville. I was going to gravity bleed them but now I have my brother to help me. When I go to bleed them does he need to pump the brakes and then push the pedal down or does he just push the pedal down. Also if he needs to pump the brakes does he only have to do it once on that side. Also does he need to pump the brakes every time we switch to another bleeder. Thanks.