TM 5-4320-302-146-9. VALVES, VALVE GUIDES, AND VALVE SEATS (CONT)Location/ItemActionRemarksREMOVALCAUTIONDo not damage cylinder head.5.Valve seatInsert valve seat ring mandrel No. 122450 intoinsert ringscylinder head. Clamp down valve seat ringmandrel and cylinder head into milling latheand bore out valve seat ring inserts. Take carenot to bore into cylinder head counterbore.6-53
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