INSPECTION OF VALVE SEATS

VALVES, VALVE GUIDES, AND VALVE SEATS (CONT) - TM-5-4320-302-14_384

TM-5-4320-302-14 Forward Area Water Point Supply System (FAWPSS) Model WP55100 NSN 4320-01-168-1629 and Model 9095-91 NSN 4320-01-338-3305 Manual
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TM 5-4320-302-14 5-21. VALVES, VALVE GUIDES, AND VALVE SEATS (CONT) Location/Item Action Remarks INSPECTION OF VALVE SEATS NOTE Always use a NEW valve in making valve seat insert ring measurements. 8. Valve seat Measure distance between installed valve head center insert ring and cylinder head seat with depth gage. Distance should be between 0.2047 inch (5.2 mm) and 0.2323 inch (5.9 mm). If distance is less than specified, or if any valve seat insert rings show excessive wear, cracks, pitting, or improper valve seat angle (greater or less than 45 degrees), notify general support for repair or replacement. INSTALLATION/REPLACEMENT 9. Valve rotators Install rotators on valve guides. NOTE Make sure valve rotator recess is on top to accommodate springs. 5-98

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