TM 9-4310-394-13Figure 5-1. Fuel Injector Valve Assembly Replacement.b.Test.The fuel injector valve is tested by checking the spray pattern ejected from the nozzle of the valve. Whenfuel is forced through the injector nozzle, it should have the following characteristics.(1)Spray pattern should be equal with the spray from each of the four nozzle ports coming out at the sameangle.(2)The spray from the nozzle should be a very fine mist.(3)The spray should be smooth and steady without any pulsing.c.Installation.(1)Install new fuel injection nozzle gasket (4) and spacer (5) onto fuel injection nozzle (3) before installingnozzle into cylinder block.NOTEMake sure nozzle and sleeve surface is clean. Carbon deposits will build up on nozzle in theform of flowers. Flowering lowers combustion performance significantly.5-5
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