How do you change power steering fluid?

Answer 1

Simply withdraw only the fluid that's readily accessible in its small reservoir, and replace that portion with fresh fluid. You'll be doing this several times over a week or so until the fluid color looks normal. To use this technique, you first have to acquire the proper tool. It's sold as a "fluid removal/transfer tool" or battery filler, and resembles a turkey baster (but that's made of different materials, so don't use one of those from your kitchen). You'll also need to purchase the proper type and amount of Power Steering fluid and refill to the proper level, start your engine then cycle the steering left then right and recheck level.
Unless you have contaminated fluid (or several 100K miles), you should not need to change it. How to answer:

The following procedure will work in most cases (no vehicle specifics given)

If you're asking how to do it you should give vehicle specifics, year, make model & engine size. On most vehicles the best way is to drain the reservoir if you can then disconnect the return line at the reservoir. Get a few feet of hose the same size as the return line and use a hose connector or vacum line connector and connect the length of hose to the return line. Put the end of the hose in a large (1 Gal.) container. Make sure the line connector won't come apart as you will have a flood of oil everywhere if it does. Open the lid on the reservoir and fill it up with new clean p/s fluid and start the car. Keep filling the reservoir as the pump pushes it out into the container. When clean fluid comes out into your dirty fluid container have someone turn the wheel left to right slowly a few times while you keep adding fluid. Try not to let the pump run dry as you can damage or shorten the life of the pump. Once you're satisfied with the fluid color then you're done. Reconnect the return line and put the lid back on with the correct fluid level in reservoir and turn the wheel fully from side to side a few times to make sure the air is bled out. This flush may take 2 -3 qts depending on contaminants in the system and capacity of system. Get rid of the old oil properly (most garages & automotive suppliers will take it). If in doubt get a professional repair person to do it for you (it's not that expensive). You may want to add a power steering fluid conditioner (eg: Lucas) when you're done.