Bleeding the power steering system (Mondeo 4)

Bleeding (removing air) of the hydraulic system of the power steering is necessary after any work related to depressurization of the system (replacing the pump or pipelines). A sign of the presence of air in the system is the jamming of the steering wheel when trying to turn it sharply. In addition, the pump makes increased noise when turning the steering wheel, and the liquid in the tank usually foams.



1. Fill the power steering system with working fluid up to the "MAX" mark (see Checking the level and adding working fluid to the power steering reservoir).

2. Start the engine and turn the steering wheel all the way to one side.

WARNING: Do not hold the steering wheel in the lock position for more than 10 seconds.

3. Turn the steering wheel all the way in the opposite direction.

4. Turn the steering wheel to the center position and turn off the engine.

5. Check the level of working fluid in the power steering reservoir and top up if necessary.

NOTE: When the engine is warm, the working fluid level in the tank should not be above the "MAX" mark; when the engine is cold, it should not be below the "MIN" mark.

6. Repeat steps 2–5 until the working fluid level in the tank stops decreasing.