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Describe how the oil filter system works on a double reduction fan drive?

The filtering system used on a double reduction fan drive utilizes a positive displacement pump that is driven by the intermediate shaft.  The pump forces oil through the filter mounted on the outside of the gear case.  The filter contains a 75 micron, acrylic fiber element that has a low-pressure drop.  The filter housing has a built-in bypass valve to ensure oil flow with a clogged filter.  After filtering, the oil is routed inside the gear case where it is distributed to the bearings and gears using a manifold system. 


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