volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Vacuum Brake Booster|Testing and Inspection|Page 6126 > < Diagram Information and Instructions|Page 6121
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Vacuum Brake Booster: Testing and Inspection

Vacuum system, checking

Preparation

Disconnect the battery lead 

See VCC-104452.

Preparations for checking the check valve

Remove: 
-

the mounting screws for the torque rod

-

the screw and nut for the engine mounting in the torque rod

-

the torque rod.

Check the vacuum hose

Check: 

-

the vacuum hose connections at the manifold and the check valve

-

that the vacuum hose is not crimped or rubbing anywhere

-

that the vacuum hose inner weave has not broken and blocked the through flow. Disconnect the hose. Start the engine. Check the vacuum.

Check the check valve 

Vacuum Brake Booster|Testing and Inspection|Page 6126 > < Diagram Information and Instructions|Page 6121