I have an early 1020 that had a hydraulic system contaminated with metal. The transmission screen had a whole in, and the main filter was being bypassed due to the cone at the bottom not holding the filter against the transmission case. So the metal went through the transmission, power steering pump, and main hydraulic pump. I have the rear apart to repair and clean as well as everything else. I'm replacing the trans and main hydraulic pump. The power steering pump is very expensive to repair, or if parts are even available. Is there any cost effective option to fix the power steering. The newer 1020's have a closed center steering unit. What all is involved in retrofitting from open center unit to closed center? Another option I thought of was using an aftermarket power steering kit. I could use the belt driven pump and reservoir and plumb to my existing open center column to make it work. They don't recommend their steering cylinder for loader tractors, plus their mount goes where my loader mounts. Any thoughts, help would be appreciated.