it's interesting to read all the messages
... there are a lot of reasons behind each comment, no matter how you say it... i really appreciate it.
it all started from two symptoms - 1) i felt steering wheel pulsing while making sharp turns; 2) on a straight road, it tended to turn to left or right that i had to correct it constantly (it's not about a driving technique though; the alignment was done 10kmi ago). i thought it might be because of low in steering fluid or its filters need to be replaced. that are the simplest things to start with, but i couldn't find where the ps reservoir was... anyway i know it now (thanks Steve Ownby correcting the concept of shared fluid). i topped it off with dexron iii but seems no improvements. next i'll order the filters and see if that makes difference.
i asked a mechanic about the air compressor, which is attached to engine body being directly gear driven. the ps pump is next to it, no belt either. so that is good as i don't need to touch them.
for newbies, there will be a lot questions; to gurus, some might appear idiotic... well we are learning; we will overcome "growing pain" and get there