TM10-4320-315-244-3. MAINTENANCE OF FUEL INJECTORSThis task covers: a.Disassemblyc.Assemblyb.Repaird.TestINITIAL SETUP:ToolsGeneralSafetyInstructionsGeneral Mechanics Tool KitItem 1, Appendix B)WARNINGMaterials/PartsDiesel fuel is flammable. Keep sparks, cigarettes,and open flame away from fuel system componentsFuel (Item 9, Appendix C)while working on engine.EquipmentConditionsFuel injectors removed (para. 2-50).a.DISASSEMBLE. (Figure 4-1)(1)Remove injection cap (1) from nozzle holder (2).(2)Remove nozzle assembly (3), intermediate piece (4), plunger (5), spring (6), and shims (7).b.INSPECT.(1)Wash all parts with clean diesel fuel.(2)Inspect intermediate piece for scratches, burrs, or wear on the seating surfaces. Replace damaged intermediate piece.CAUTIONDo not touch needle seating surface. Needle can be damaged.(3)Remove needle (8) from nozzle assembly (3).(4)Insert needle (8) into nozzle assembly (3). Hold nozzle assembly vertical. Allow needle (8) to slide slowly, under its own weight, down on seat. If needle does not seat, replace nozzle assembly.c.ASSEMBLE.(1)Insert shims (7) in the nozzle holder (2).(2)Refer to injector test (task d). Add or subtract shims (8) as necessary to obtain correct opening pressure.(3)Insert spring (6) in nozzle holder (2).(4)Install plunger (5) on spring (6) with beveled side of plunger away from spring.4-2
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
