This afternoon I had a load of fun changing the power steering fluid on my '97 900. Even though the VIN was well past the one where they switched over to CHF-11S fluid, what was in my car was completely brown. That's bothered me for a while, so I finally changed it all to CHF-11S. I initially pulled off the supply hose to the pump, thinking it was the return hose, and blew oil all over the place when the pump sucked in air and compressed air was blown into the reservoir for a second. ;oops: For future reference, the return line is the small one on the bottom of the reservoir with the kink at the end. I attached a short foot long hose to the return line nipple on the reservoir with a plug at the end, then stuck the return hose in an empty 2-liter pop bottle. The pump sucks up the fluid so fast that I went through an entire bottle of fluid before I knew it. It took another before it was all coming out green, and half of a third to fill the reservoir up again. Word of advice: order the Febi-Bilstein fluid from eEuroparts if you're going to flush your old stuff all out. It's half the cost of Pentosin at NAPA. Once the air worked its way out of the system (keep the reservoir cap open and turn the wheel lock to lock a couple of times), the pump stopped making funny noises, so I don't think I did any damage running it dry, but only time will tell... The steering does seem a little lighter than it did, which is a plus.