Probably old news , I just repaired my high pressure power steer line. It was leaking at the pump. You can buy a new nut from Ford, then I drained the pump reservoir and disconnected the hose at the pump. I covered the complete engine bay and using my angle grinder with a 2mm thick cut off wheel gently ground into the nut. By grinding along the length of the nut in two cuts (opposite each other) the nut was weakened to enable me to use a screwdriver to split it in two halves. Once the nut is off a gold spring clip was still on the hose, it was removed (this is inside your new nut). Screw the new nut into the pump, put a little lube on the high pressure pipe and push it into the nut until it clicks into place. Done, refill the reservoir. The main thing to be aware of is not to grind the nut too deep, as if you nick the pipe within the nut it will not seal against the new O ring. You will then need a complete line. Took about an hour, now the bay looks like new again.
