I took the unit out to find a leak, found leak and fixed. it was the o ring in the back of the pump cover thing. Put it back in and now the unit wont pressurize the system. the motor turns on and just runs constantly. but the pedal has no power assist to it. everything worked fine before i did this, except for the leak that is. did i forget to do something before i turned it on? i'm at a total loss here.