LUBRICATION SYSTEMSYSTEMS OPERATIONcounterbore on each side that the hollow dowel goesthrough. An O-ring is in each counterbore to preventoil leakage around the hollow dowel. Oil flowsthrough the hollow dowel into a vertical passage inthe cylinder head to the rocker arm shaft bracket.The rocker arm shaft has an orifice to restrict the oilflow to the rocker arms. The rear rocker arm bracketalso has an O-ring that seals against the head bolt.This seal prevents oil from going down around thehead bolt and leaking past the head gasket or spacerplate gasket. The O-ring must be replaced each timethe head bolt is removed from the rear rocker armbracket.All the riming gear bearings get lubricant underpressure from the oil manifold through connectingdrilled passages.TM 5-3805-263-14&P-2Oil goes to the components and attachments onthe outside of the engine through supply lines whichconnect to the oil manifold. These components andattachments are: turbocharger, air compressor andothers.After the lubrication oil has done its work, it goesback to the engine oil pan.1-17
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