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Grinding noise....??

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Old 05-23-2012, 06:03 AM
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60DRB 60DRB is offline
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As you sped up the vacuum pressure changed (normal). The re-occurance of the grinding at that time indicates there is still a leak somewhere in the 4x4 vacuum lines, or a bad IWE internal seal. Have you checked the two (one way air flow) check valves? They are often overlooked when trouble shooting.
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