TM 10-4320-344-244.4.2 Cylinder Head Assembly, Intake Valve, and Exhaust Valve Repair, Models 609-C and US636HCCD-l.This task covers:4 .4 . 2 . 1 D i s a s s e m b ly4.4.2.3 Assembly4 .4 . 2 . 2 R e p a i rINITIALSETUPToolsGeneral Mechanic’s AutomotiveTool Kit, Appendix B, SectionIII, Item 1Drill, Appendix B, Section III, Item 3Micrometer, Appendix B, Section III,Item 3Vernier Calipers, Appendix B, Item 3Valve Spring Compressor, Appendix B,Section III, Item 20Cutting Device, Appendix B, SectionI I I,Item 21Reamer, Appendix B, Section III,Item 22Mandrel (Intake), Appendix B, SectionI I I,Item 23Mandrel (Exhaust), Appendix B, SectionI I I , Item 24Mandrel,Appendix B, Section 111,Item 25Tools(Continued)Cutter, Appendix B, Section III,Item 26Pilot Pin, Appendix B, Section III,Item 27Material/PartsRags, Appendix C, Item 20Tags, Appendix C, Item 31Locating Ring (TM 10-4320-344-24P)Valve (TM 10-4320-344-24P)Equipment ConditionsCylinder Head Assembly removed, paragraph3 .8 .20.General Safety InstructionsDo not work on equipment that is notsecurely stabilized to prevent rollingo r s l i d i n g.To prevent burns do not work on hotengine components.Allow engine to cool.Do not work on equipment without follow-ing standard shop safety practices.4.4.2.1 Disassembly.a.b .c .d.Install cylinder head (Figure 4-2, 1) in clampingUsing valve spring compressor, remove two taperedspring retainers (3), and springs (4).s t a n d.valve spring locks (2),Valve rotator is mounted on exhaust valve.Remove one valve rotator or retainer (5).Tag and remove valves (6 and 7) from cylinder head (l).4.4.2.2 Repair.a.Inspect cylinder head assembly components for obvious defects.Replacedefective components.b.Measure length of valve springs (4).Minimum length is 2.205 inches (56 mm).Replace valve springs (4) if less than minimum length.4-8
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