Quote:
Originally Posted by tyl604
The last time I did it I just sucked out the power steering fluid with a turkey baster and replaced the filter. 1981 300SD.
Does it need to be more complicated than that?
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You only changed about 1/3 of the fluid. No different from changing the coolant or the brake fluid - only a small amount exists in the reservoir, most of the fluid is in the other parts of the system.
The majority of the fluid is out of reach, down inside the pump, steering box, and hoses. To do a full power steering fluid exchange, you disconnect the return line from the fluid reservoir. Aim the return line into a catch can, and plug the return line flange in the reservoir. Put the front wheels on jack stands. Have a helper turn the steering wheel from lock to lock a couple times (with engine OFF), while you keep the reservoir topped up. Once the fluid flowing into the catch can starts looking clean, you're done, the system is fully flushed with new fluid.