does the pump moter even run? it should run full-out as soon as you loosen the blue canister. if it does not, your switch is bad. The switch is the square white block located along the top of the pump housing. If the pump does not run when you open the canister, give the housing a rap with the end of a screwdriver. If it starts to run a little after that, the switch is sticky, and needs to be replaced. If it still does not run at all, the motor is bad ( locked rotor ) you can exchange the pressure pump for the vacuum pump, just be mindful of where the tubing connects to the housings ( vacuum connects to input, pressure connects to the output ) otherwise they are the same. If that works, you just need one of those motors ( google them, because you can't buy them from HP individually. )
LIke I posted earlier, this was a bank repo and it has sat for a year now before I got it.. Have replaced the vacuum sensor, regulator and that little brass thing.
I just need some quality pics of a know working system. It looks like my lines have been tampered with.