CYL GP-HYD 4717490 - Caterpillar

1. Clean the entire cylinder head area around the fuel injection lines.2. Remove the fuel injection nozzle retaining clamps.3. Disconnect the injection nozzle and the fuel injection line from the adapter. Remove the adapter.4. Lift the injection nozzle out of the cylinder head.
Pull nozzle straight out, by hand, to remove. Slight twisting action is permissible if necessary. Never attempt to pry out a nozzle with a screwdriver or other similar tool.
5. Remove the O-ring seals on nozzle. Remove the compression seal from nozzle. Using needle-nose pliers, remove the carbon seal dam.Install Fuel Injection Nozzles
1. Clean the nozzle bore in the cylinder head, nozzle inlet fittings and the gasket surfaces. Dirt or burrs on the gasket surfaces can cause body distortion, resulting in a sticking valve.
Never install an injection nozzle that has been dropped, without first testing it with the 8S2242 Nozzle Testing Group. The injector tips are very hard and brittle and break easily.
2. Install a new compression seal and carbon seal dam. Use tool (A) to install the carbon seal dam.3. Install a new O-ring seal on the injection nozzle and a new O-ring seal on the adapter.4. Install the nozzle into the cylinder head using a twisting motion. Do not use lubricant in the cylinder head bore or on the nozzle body.
Do not bend the injector inlet connection when installing nozzle into cylinder head. Bending of the inlet connection creates tension on the injector and causes binding of the needle in the guide.
5. Install the adapter and connect nozzle and injection line. Tighten retaining nuts to 30 5 lb. ft. (4,1 0,7 mkg). Install the nozzle retaining clamps.concluding step: a) install rocker shaft assemblies