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Removing and installing brake master cylinder > < Vacuum pump for brake booster (diesel vehicles) - Assembly overview|Fitting

Leon Mk2

Checking the retention valve
   
Checking the retention valve
t  The retention valve -A- must allow air to pass in the direction shown by the arrow.
t  In the opposite direction the valve should remain closed.
Make sure the valve is fitted in the correct position.
  N47-0046

Removing and installing brake master cylinder > < Vacuum pump for brake booster (diesel vehicles) - Assembly overview|Fitting