i hate when i have to take out a brake from a dead motor to put it on a new motor, always trying to keep everything in one piece but these fking spacers keeps moving and loosing allignement.... But this isnt adjustment here, you are supposed to use a gauge to check the gap with the brake plate. Or personally i just activate and desactivate the brake, and if i dont hear it moving its too tight, i unscrew 1 turn (1.5mm) then try again untill i have a clack when activating the brake