4720 Power Steering Intermittently Locks Up

[mike48130]

Ah. My bad. Doesn't the front pump feed the hydro and steering and on the 4x10 series the pto and 4x4. I would check the steering psi. It has its own pressure relief. Could be sticking I would guess. I would pull it and clean it then test the pressure.

But to continue that thought maybe it is getting air in. Even with no pressure coming in your wheel should still be trying to push the fluid in the power steering valve. Any chance you have a mechanical issue with the steering column to the valve?

 

[RoyJackson]

But to continue that thought maybe it is getting air in. Even with no pressure coming in your wheel should still be trying to push the fluid in the power steering valve. Any chance you have a mechanical issue with the steering column to the valve?

Well, the thread is pretty old...but the first thing I'd check would be the front tires inflation pressure