Ignition compltely off, pump brake pedal ten times. This relieves the pressure in the PM system and returns the fluid to the PM side of the reservoir. Remove your old accumulator and install the new one. Turn the ignition on and check for leaks. PM motor should not run for more than 20 seconds. If it does, turn the ignition off and loosen the hose below the accumulator (DON'T COMPLETEY REMOVE THE HOSE, IT IS UNDER EXTREME PRESSURE), until brake fluid flows. This bleeds the PM side of the master cylinder. Tighten hose and turn ignition on again, PM motor should not run for more than 20 seconds.