Vacuum reservoir

During operation, the vacuum reservoir ensures a certain stored supply of partial vacuum.

The vacuum reservoir must be checked for the following faults: 

• Leak-tightness: 

  Check the leak-tightness of the vacuum reservoir by applying a partial vacuum.

• Leaking connections 

  The O-rings of the connections can be defective and thus cause leaks.

  Fig 1: Locating Defective O-Ring Of Vacuum Reservoir

  Courtesy of BMW OF NORTH AMERICA, INC.

  Defective O-ring at the connection of the vacuum reservoir.