Dirt, heat, moisture and time. SOunds like you need a change. I would disconnect the low pressure return line( the one coming back from the steering box) and drain as much as you can. You can also buy a plastic type syringe at Walmart and draw the old fluid out of the resevoir. Reconnect the hose and refill it with some Lucas Power Steering addative and some power steering fluid. This might buy you some time on your power steering pump. The old fluid has probably lost some of it's additives and lubricants by now and the seals in your pump are not being protected as they would with new fluid. It's a simple and inexpensive do it yourself and it may save you a couple of hundred in a P/S replacement.
dirty oil in system not drained from previous pump
Check power steering fluid first, then take it to the shop if it is full.
it should be a black cylender cup thing that says power steering fluid
The power steering fluid for it is actually the transmission fluid. It should be Mercron. Is this suposed to go in the power steering chamber or the transmission chamber to work. The fluid in my 2006 Ford Escape XLT steering fluid tank is black.
Faulty power steering pump, bad power steering fluid, insufficient or excessive power steering fluid.
you may need more power steering fluid.
Air in a power steering system is caused by low fluid or a leaking seal. When the fluid is low, the pump becomes exposed to the air and causes large bubbles to form.
Low on power steering fluid. Loose or missing drive belt. Faulty power steering pump. Faulty power steering box.
Assuming you have power steering, you may have a loose belt or the power steering system has a leak and the power steering fluid reservoir is low or empty.
Low Power Steering Fluid
The power steering fluid goes in the resevor which is located on the passenger side of the engine. It has a black cap
your pump could be low on power steering fluid, your power steering belt could have came off if equiped with a separate belt and finally the pump could have failed from low fluid, or dirty fluid