S70 L5-2.4L VIN 61 B5244S (2000)
Vacuum Brake Booster: Testing and Inspection
Vacuum system, checking
Preparation
Disconnect the battery lead
See VCC-104452.
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