I have a yale erc060vgn36teo90 and have no power steering unless I call for a hyd function at the control valve which is ramping up the motor and increasing my pressure, I have checked the steering sensor located under the steering wheel and have a smooth count on my display analyzer, so I am guessing my sensor is good, my pump and motor seem fine as it lifts and my other functions are working, I am suspecting their should be a priority valve somewhere for this unit but I have no hyd schematics or literature on the this unit, any help would be greatly appreciated