Figure 1-66. Fuel injector nozzle and holder assembly

Check the nozzle retaining spring to dimensions

4-17. Removal and Testing

shown in figure 4-166, as springs that have been

a. General. The fuel injector nozzle and holder

installed over a period of time tend to take a

assemblies are generally removed while

permanent "set". The nozzles are to be replaced

troubleshooting the fuel system, particularly

1 0 0 % at time of overhaul. Nozzle pressure

w h e n a fuel injection pump has failed. The

adjusting shims are furnished in shim set FSN

nozzles should be tested on a nozzle tester for

5365-235-1941.

opening pressure, spray pattern, leakage and

n o z z l e chatter before reinstalling in engine.

4-81