Lycoming Adjustable Oil Pressure Relief Valve Assembly, 77808
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Lycoming 77808 is an adjustable oil pressure relief valve assembly for Lycoming engines. Lycoming's Illustrated Parts Catalogs list it under Crankcase Related Parts, one per engine, for the (L)IO-360-M1A, IO-360-L2A, IO-360-B4A, AEIO-360-B1F and O-540-F1B5.
- Adjustable type: Lycoming's catalogue note says to select the relief valve spring so a minimum of three threads are exposed on the adjusting screw to allow field adjustment, with spring identification in Table of Limits SSP-1776 Part I
- The relief valve spring, ball and annular gasket are listed as separate items in the same Lycoming catalogues
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