In a message dated 2/6/01 10:49:50 AM, ewoenker@KCONLINE.COM writes:

<< Can anyone help me in identifying the cause of this? >>

Ed,

Opening a hydraulic system can be like the children's storybook "If You Give
a Mouse a Cookie".  If you have never had the pleasure of reading this a
hundred times, it goes something like this: If you give a mouse a cookie, he
will want a glass of milk.  If you give him a glass of milk, he will want a
straw.  If you give him a straw, he will want . . .  It goes on like that for
about 30 pages until the entire house is turned upside down.

Although it is frequently ignored in automotive garages, cleanliness is next
to Godliness whenever a hydraulic system needs to be opened.  Dirt entering
the system or sediment within the system which is dislodged can cause all
manner of problems.  If I were you, I would remove the reservoir, after first
cleaning the connections, and flush at least a gallon (2 would be better) of
new fluid through the system while turning the steering wheel lock to lock.
Of course, whatever you use as a reservoir for the flush must be perfectly
clean.  The spent fluid cannot be used again.  Then wash out the reservoir
well enough that you would not hesitate to drink from it and fill your
system.  From my experience, the system is self-bleeding and working the
steering wheel purges the air.

With some luck you will have flushed out any caa-caa which may have been
causing the noise.

Rich