volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Power Brake Booster Overload Relay|Page 5732 > < Power Brake Booster Overload Relay|Page 5730
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Vacuum Brake Booster: Testing and Inspection

Vacuum system, checking

Preparation

Disconnect the negative battery lead

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 

Power Brake Booster Overload Relay|Page 5732 > < Power Brake Booster Overload Relay|Page 5730