Explorer Power Steering Pump to Reservoir Pressure?

[ntsqd]

Back when Lee PS was owned and run by Tom Lee they had a steering system test bench to test their parts & systems with. I know that I saw it once, but I have no memory of it. I tend to take their suggestions seriously because of that.

 

[Yeller]

All of the power steering companies hate it, they say it’s too thick, but I’ve run Amsoil tractor fluid for a couple of decades. But it has cured nearly every noisy pump I’ve put it in and have yet to have a pump or hardware failure of new parts. However, Ive had seal and pump drive failures on very well used parts. As @ntsqd stated even plain hydraulic oil works fine. I’ve even used hydraulic oil as shock oil, I know way off topic lol.