Just turn the wheel one way about a full turn of the steering wheel and remove the drain plug. The steering box won't drain in the center position, but you don't need to go far to get to an open position on the working piston.

Please get another person to fill it back up. You want to fill the reservoir as high as you can (engine will jostle it a bit and might spill), then have someone sit at the wheel and start the engine. The wheel needs to be turned from lock to lock moderately slow while someone else fills the reservoir back up. You don't want the pump to run dry.

Lock to lock twice should be more than enough to bleed the system.

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I recondition w123/w126/w124/w140/r107/r129/ steering boxes!


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