SAAB WIS ONLINE

Vacuum pump

Vacuum pump

To increase the braking effect on Saab 9-5 2.0 and 2.3 with automatic transmission, these cars have been equipped with an additional vacuum pump. The pump provides the brake servo with negative pressure when the engine is unable to supply this fully.


The pump is ring type, mounted on the cylinder head and driven by the camshaft. Since it is connected to the camshaft, the speed of the pump is half that of the engine, and negative pressure is produced continually for the brake system.