V70 XC AWD L5-2.4L Turbo VIN 56 B5254T (1998)
Vacuum Brake Booster: Testing and Inspection
Vacuum system, checking
Disconnect the negative battery lead
Preparations for checking the check valve
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
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