Help! My steering quit! (PROBLEM SOLVED)

All you guys lobbying for a problem with the flow control valve were right. My mechanic removed the pump from the engine, then removed and replaced the flow control valve in the output side of the pump. Problem solved. He said that the existing flow control valve had become stuck bottomed out and was contaminated with some crud, likely from the earlier replacement of both hoses and flushing new oil through the system. No problem with the existing pump. He just put in a new flow control valve and it steers like a new car now. Well not really like a new car. It steers like a 1974 Plymouth with the typically vague and overassisted steering feel from Mopars back then. Anyhow, all is well and I'm happy. Thanks for everyone's input! BOB