Today, after two hours of bleeding more air out of the system, I capped off the lines to all three landing gear, as well as the dump valve. The only things left in the system at that point were the pressure gauges. When I ran the pump in either direction, I still got no pressure - the gauges just barely lifted off the pegs. So something is wrong with the pump. I cut the wires, undid the fittings, and removed the pump from behind the baggage bulkhead. Now what? I can't buy a new one and I have no idea where to send the old one for repair. Nuts!