TM 5-4320-302-146-9. VALVES, VALVE GUIDES, AND VALVE SEATS (CONT)Location/ItemActionRemarksWARNINGSevere burns, illness, or death may result if personnel fail to handle diesel fuel oilproperly. Observe the following precautions:·Do not inhale vapor.·Do not handle fuel near open flame, sparks, or excessive heat.·Work in a well-ventilated area.NOTEAlways use NEW valve in making valve seat insert ring measurements.b.Measure distance between installed valve headcenter and cylinder head seat with depth gage.Distance should be between 0.2047 inch (5.2mm) and 0.2323 inch (5.9 mm). If distanceexceeds upper limit, replace valve seat insert ring.6-52
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