TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 4-166. 4-17. Removal and Testing a. General. The fuel injector nozzle and holder assemblies are generally removed while troubleshooting the fuel system, particularly when a fuel injection pump has failed. The nozzles should be tested on a nozzle tester for opening pressure, spray pattern, leakage and nozzle chatter before reinstalling in engine. Check the nozzle retaining spring to dimensions shown in figure 4-166, as springs that have been installed over a period of time tend to take a permanent “set”. The nozzles are to be replaced 100% at time of overhaul. Nozzle pressure adjusting shims are furnished in shim set FSN 5365-235-1941. 4-81