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volvo Workshop Repair Guides


V70 GL L5-2.4L VIN 55 B5254S (1998)

Brakes and Traction Control > Power Brake Assist > Vacuum Brake Booster > Component Information > Description and Operation > Page 5246

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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: 

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the mounting screws for the torque rod

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

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the torque rod.

Check the vacuum hose

Check: 

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the vacuum hose connections at the manifold and the check valve

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that the vacuum hose is not crimped or rubbing anywhere

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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 

Brakes and Traction Control > Power Brake Assist > Vacuum Brake Booster > Component Information > Description and Operation > Page 5246

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