Problem Solved!
Thank you everyone for your advice and recommendations.
The problem was the pressure relief valve. I took the power steering pump apart and realized that the housing portion that holds the gears is reversible but in only one direction does the hydraulic fluid flow through the port into the pressure relief valve. I had it backwards so no fluid would flow into the valve, thus building up too much pressure and blowing the seal. I reassembled the pump correctly and now everything works fine.
I don’t know if I assembled it wrong the first time I installed it or if it came out of the box that way. Anyway, all is good now. Thanks again…
Rick