REPLACE/REPAIR VALVES, VALVE GUIDES, AND VALVE SEATS (Continued)

TM 5-4320-306-24 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