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Page Title: REPLACE/REPAIR VALVES, VALVE GUIDES, AND VALVE SEATS (Continued)
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TM 5-4320-306-24 4-7.  REPLACE/REPAIR VALVES, VALVE GUIDES, AND VALVE SEATS (Continued) g.  Inspect installed valve seat insert rings (1) for nicks, burrs,    or    other    minor    damage    to    valve    mating surfaces.  Very carefully smooth out any nicks, burrs, or other minor damage with valve guide mandrel No 122305,   valve   seat      ring   cutter      No.   122302   (2), mandrel  handle  122306  (3),  and  holder  No  122304 (4). h.  Check valve head/cylinder head seat clearance with NEW valve in accordance with procedure in CLEANING/INSPECTION step 10. Maximum clearance is 0 2520 inch (6.4 mm) Minimum clearance is 0.2283 inch (5.8 mm) i.   If maximum clearance is exceeded, replace valve seat insert rings again Follow procedure described in step d.  If clearance is below minimum, remachine valve seat insert rings with valve seat ring cutter No. 122302 and holder No 122304 Reconfirm that clearance falls within limits after remachining. NOTE If  remachining  will  cause  either  limit  to  be  exceeded,  replace  valve  seat  insert rings or valves, respectively. WARNING Death or serious injury could occur if diesel fuel oil is not handled carefully.  Use in   a   well-ventilated   area   away   from   open   flame,   arcing   equipment,   ignition sources,   heaters,   or   excessive   heat.      Always   store   fuel   in   proper,   marked containers.  DO NOT SMOKE. Death or serious injury could occur if compressed air is directed against the skin. Do not use compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.11 kgcm2) or less.  When working with compressed air always use chip guards, eye protection, and other personal protective equipment. j.  Clean valve seat insert rings with diesel fuel oil and dry with low pressure compressed air 4-54

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