Do you have to raise the tires to do the powersteeri g bleed? If there is a lot of froth on top of the fluid during the bleed what does that mean? Might is be necessary to do this for a prolonged period to get the result of removing all the air?

 

Lots of froth means that there is still air in the system.
I didn't raise mine, I just kept an eye on it and added more when the level dropped.
And when bleeding go from lock to lock _ gently.
ALWAYS bleed when the truck is running, NEVER when it's not.
DO NOT turn the steering wheel when the truck isn't running.

 

Ok. I get some improvement when I do it. I can't stop the whine. It gets worse near the passenger side closer to lock. I was at it awhile. I think my cap tool got a leak. So I have to fix that before I can try more. It is more quiet now. Noticably. But it will get loud again. Very difficult to get the stock cap on. I did. But it might not have been in tight before.

 

There may be an O-ring on the cap that needs replacing, they do get hard.
When turning from lock to lock, do it steady and slowly, don't stop and start, the air should work it's way out.
They are noisy, give it a few days and watch that things don't get hot, it should not get so hot that the oil is boiling or smoking, that's for sure.

Some posts here mention that some use some sort of bleeding device, but I never had to use such a thing on any power steering units.

I tore my box all apart and put a kit in it and replaced all the O-rings on the lines _ they were leaking badly.
Some of the O-rings in the kit were the wrong size, they had to be metric, I had to go to a place where they rebuild hydraulic equipment to get the right O-rings.
It still was fairly noisy afterwards.