Disconnect the drain hose (1).
Connect the hose (2) to the drain hose and drain the working fluid into a suitable container.
Disconnect the high tension center wire from the ignition coil.
To completely drain the working fluid, turn the starter on for several short periods while constantly turning the steering wheel left and right.
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Place the drain hose back in place and secure it with a clamp.
Fill the reservoir with the recommended fluid to the bottom position of the filter, then bleed the air from the power steering hydraulic system.