Nozzle Cleaning
- To disassemble, place upper section of nozzle in vise, loosen lower section. Reverse position of nozzle in vice and carefully remove parts from lower section. Do not interchange parts from one injector to another.
- Clean all parts in diesel fuel. Use brass brush to clean carbon deposits from outside of nozzle. Polish needle seat with a piece of close grained hardwood dipped in diesel fuel.
- Inspect needle valve and nozzle sleeve for damage or wear. A rough machined appearance on pressure shoulder is not a sign of wear.
- Dip needle valve in clean test fluid and insert into injector. Pull needle valve 1/3 of way out of injector. Allow needle to slide down under its own weight. If needle does not slide smoothly, clean and repeat test.
- Assemble all parts after cleaning. Tighten injector assembly cap to holder to specification. Install new heat shields with recess in shield pointing upward. See Fig 1 . Tighten nozzles to specification.