TM 9-6115-670-14&P 5-35 5.13.  INJECTION NOZZLE ASSEMBLY. This Task Covers:  a. Test b. Replace INITIAL SETUP Tools General Mechanic's Tool Kit (Item 1, Appendix B) Injection Pump Pressure Tester (Item 19, Appendix B) Gloves, Chemical and Oil Protective Goggles, Rubber Apron, and Mask (Item 34, Appendix B) Suitable Container for Fuel Equipment Conditions Engine off and allowed to cool for thirty minutes. MASTER ON-OFF switch on APU control unit set to OFF. Injection lines removed (para 4.35., steps h, i, j). Materials/Parts Injection Nozzle Assembly Injection Nozzle Washer Gasket (Item 21, Appendix J) TEST a.  Remove injection nozzle assembly (perform steps a, b, and c of REPLACE). b.  Test nozzle spraying condition. (1)    Install injection nozzle (1, Figure 5-7 (sheet 1)) to injection pump pressure tester (2). (2)    Pump the tester handle until fuel fully sprays out from the nozzle. (3)    Observe the spray (3). If uneven or defective, replace the nozzle. WARNING Ensure that NO IGNITION SOURCE is within 50 feet of the   10   kW   APU.   The   fuel   in   this   APU   is   highly flammable. Do not smoke. Do not splash fuel on hot components.  Failure  to  observe  this  warning  could result in severe injury to personnel or DEATH. WARNING Avoid fuel contact with skin. Wear protective gloves, goggles,  apron,  and  mask.  Failure  to  observe  this warning could result in severe injury to personnel or DEATH. WARNING Always point fuel spray away from direction of personnel. Contact with the fuel spray could cause blood poisoning and   cell   damage.   Always   aim   spray   into   a   suitable container.  Failure to observe this warning could result in severe injury to personnel or DEATH.