Have your fan belt checked. You can replace it yourself if needed, it's pretty straight forward.
Does it whine or howl? A howl is the classic "turn your wheels and the wolves start singing". That is a loose belt. A whine in my experience is low fluid, cavitating right above the impeller, top it off and you should be OK. There is a pump and rack rebuild kit on craigslist for 10 bucks plus shipping! All the soft parts you need, looks like a bunch of O-rings. Couldnt hurt.
Hi,
Sorry for my ignorance but could you provide a link for "craigslist" as doing a PS pump rebuild.
Thanks