Steering system, bleeding after reconstructing

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

After steering system reconstruction, system must be bled differently depending on extent of reconstruction.

After exchanging entire steering system or exchanging steering gear:

Check hydraulic fluid level and top off if necessary.
Raise vehicle until front wheels are off the ground.
Briefly start engine (max. 2 sec.)

Pump must not draw in any air and steering wheel must not be turned under any circumstances.

Approx. 30 sec. wait between individual engine starts.

Check hydraulic fluid level and top off if necessary.
Repeat this process until oil level remains constant.
Turn steering wheel from lock to lock 10 times, with engine switched off.
Check hydraulic fluid level and top off if necessary.

Start engine.
Turn steering wheel 10 times from stop to stop.
Check hydraulic fluid level and top off if necessary.

Any remaining air in steering system will dissipate by itself when driving over the next 10 to 20 km.

When reconstruction a component of the steering system besides the steering gear (pump, hoses, etc. ):

Check hydraulic fluid level and top off if necessary.
Briefly start engine (max. 2 sec.)

Pump must not draw in any air and steering wheel must not be turned under any circumstances.

Approx. 30 sec. wait between individual engine starts.

Check hydraulic fluid level and top off if necessary.
Repeat this process until oil level remains constant.
Start engine and allow to run 2 - 3 minutes, do not turn steering wheel.

Any remaining air in steering system will dissipate by itself when driving over the next 10 to 20 km.