Users of the PSX-3 Power Steering Fluid Exchanger from RTI Technologies follow three easy steps: Insert dual hose wand into reservoir, power up unit, and cycle steering wheel lock to “lock” until waste fluid matches color of new fluid. This fluid exchanger offers a dual pump process, using two positive displacement diaphragm pumps. The clear dual process hose provides an exceptional new/used fluid visual. A fast and easy changeover allows flexibility between multiple power steering fluid types.