Fuel System/Fuel Injection Nozzles CLEAN FUEL INJECTION NOZZLE NOTE: Before testing a fuel injection nozzle with a nozzle tester, remove both sealing rings and thoroughly clean outside of injection nozzle. body and tip with brass wire brush. NEVER use a steel wire brush or scraper for this purpose. Remove the carbon stop seal from groove in nozzle body using suitable pliers. Pull seal washer from the nozzle body and discard carbon stop seal and seal washer. IMPORTANT: When removing sealing rings and cleaning the nozzle, take care not to damage the Teflon coating of the nozzle body above the groove for the carbon stop seal.
Place fuel injection nozzle in solvent or clean Diesel fuel until accumulated deposits are saturated. Clean CD,CTM125,198 -19-01DEC97 CTM3274 (01JUL99) 40-60 Saran Liter Engines 060799 PN=305 FUEL INJECTION NOZZLE TEST NOTE: Testing the performance of a nozzle while the engine is running is just a rough test. To obtain a true check of nozzle performance, use a nozzle tester JT25510 (1) and pressure line KJD10109 (2), as shown under Special Tools. Use only carefully filtered diesel fuel for testing the injection nozzles, since dirty fuel will severely -UN-08AUG89 damage the precision parts of a nozzle. N CAUTION: The nozzle tip must always point away from the operator.
The fuel issuing from an orifice can penetrate clothes and skin and L30741 thus cause severe infection. Connect the nozzle to the tester so that the axis of the nozzle forms an angle of approx. 30˚ to the vertical and the spray of fuel is directed downwards. Check all connections for leaks. Close the gauge shut-off valve and flush (bleed) the nozzle by operating test pump rapidly. CD,3274,G40,40 -19-27APR92 40 60