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Why is the Schrader valve on the C2 bus not pumping the air tanks up as before when air is applied?

April 26, 2017air applied bus C2 pumping schrader tanks valve

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Why is the Schrader valve on the C2 bus not pumping the air tanks up as before when air is applied?

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The Schrader valve allows for air to be introduced into the air tanks in the event of air compressor failure. The Schrader valve is located at the top of the engine on the driver side and looks like a tire valve stem. Some valves were not plumbed correctly during factory installation. The correct plumbing is run with black tubing. Gray tubing indicates incorrect plumbing. Call Carolina Thomas for repair if incorrect plumbing is observed.