New power steering pump issues....

[vibrancy]

Just installed a new power steering pump because I was getting a loud whine out of it when turning, but the new one is doing it too - plus when I do turn from the wheel cut hard right, then going straight/left the whole truck stutters and shakes... never kills the engine but puts a lot of strain on it - any ideas what it could be? I checked and rechecked the levels, first time go I was a little low but not by much... any help would be greatly appreciated!!

[g_k50]

Did you try a new belt first?

[vibrancy]

Brand new belt on it, had to replace the timing belt the other day so threw a new serpentine at the same time...

[tomw]

Did the installation instructions mention a break in period for the pump? If so, then you may have to live with the whine for a while until the 'slippers' seat themself to the pump body. You can also get whine when the pump is pumping aerated fluid. More of a moan, I'd say. Mmmmmrrrwwwarrrrhh. Well, I tried...
If the instructions don't mention break in, then remove it and take it back. But, I'd bet that the next one you get will whine also. If you are adventurous, you can take it apart and look for worn parts, or parts with excessive 'grooves', almost like file marks. The gizzards should be relatively smooth. Some 'rebuilders' use parts that are a little too worn, you might say.
Many pumps that work fine are replace because they leak. What you get may not be as good as what you return as a core. Seal kits are available from factory and parts houses, and most leaks can be handles w/o taking the pump apart.
tom

[vibrancy]

hmm if i am interpreting your sound correct then that is the sound, what can I do about aerated fluids? normally on brakes i know u can bleed it but can u do the same on the power steering?

[tomw]

There are several methods preached... With the engine running, wheels raised off the ground, slowly cycle the steering from lock to lock. Stop the engine, wait a while for any bubbles to come to the surface of the reservoir, and repeat. Make sure the level stays up, but do not overfill.
Some say do the same with the engine off, just turn the steering wheel back and forth lock to lock several times.

I figure it is like the fluid has 'the bends', and there is air dissolved into the fluid that will come out over time. I more or less ignore it until it goes away. As long as you don't get the fluid so aerated that it will foam out of the reservoir when you turn off the engine, you will eventually get all the embedded bubbles out over time.
tom

[vibrancy]

Ok thanks for the help - I figure ill just cruise around and let it air out on its own and cross my fingers that it will stop! Thanks again!

[g_k50]

Perhaps something was re-attached slightly out of alignment when the timing belt was changed.