Power Steering doesn't work on my 1991 Dodge W250 Cummins Truck
I have a 1991 Dodge W250 with the Cummins Diesel Engine. My problem is the power steering. It has never worked for several years. The previous owner said it had a leak so he replaced the Power Steering pump, the gearbox and both lines. But there is still no power assist. The reservoir is full and there is no air in the system as far as I can tell (No foaming). When I have the front of the truck jacked up, turning the wheels lock to lock it will blow fluid out of the reservoir and actually turn the cap. Not sure what the problem is. Everything is new. Maybe there is a faulty part? Bad pump?