FixVault
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Ford
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2004
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Escape 2.0 B
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Brakes
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Brake System - General Information
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Diagnosis And Testing
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Brake System
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Check Valve
Check Valve
Remove the vacuum booster hose from the power brake booster.
Apply 57.3 kPa (17 in-Hg) of vacuum to the vacuum booster hose. If the vacuum does not leak off after ten minutes, the check valve is OK. Otherwise, install a new check valve.