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TM 5-4320-305-24
4-7. REPLACE/REPAIR VALVES, VALVE GUIDES, AND VALVE SEATS (Continued)
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.
Clean valves with brush and diesel fuel oil. Dry with low pressure compressed air.
4 Replace compression springs that are pitted, fractured, excessively worn, or damaged. Replace any
compression spring that has an unloaded fatigue length of less than 2.2047 inches (56 mm).
5 Replace valve cones and caps that are fractured, excessively worn, or damaged.
6 Replace snap rings.
INSTALLATION:
1 Install compression springs (3) and spring caps (2) in
cylinder head (6).
2 Apply lubricating oil to stems of valves (4 and 5) and
insert valves in cylinder head (6).
3 Compress springs (3) and insert valve cones (1).
NOTE
Be sure valve cones are properly and firmly
seated.
4-57
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