0311020 JOHNSON SCREW,Silencer

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Do not let the tops of fuel nozzles turn when the fuel line nuts are loosened or tightened.The nozzles will be damaged if the top of the nozzle turns in the body.The engine will be damaged if a defective fuel injection nozzle is used because the shape of fuel (spray pattern) that comes out of the nozzles will not be correct.
Illustration 1 g00818680
Typical example
Disconnect the union nuts (1) for the fuel injection lines (2) from the fuel injection nozzles.
Disconnect the union nuts (1) for the fuel injection lines (2) from the fuel injection pump.
Remove the fuel injection lines (2) from the engine as a unit. Note: Place identification marks on all tube assemblies for installation. Plug all tube assemblies in order to prevent contamination.
Install suitable plastic plugs to the outlet connections of the fuel injection pump.
Disconnect the union nut from the banjo piece.
Illustration 2 g00824793
Typical example
Remove the nut (5) from the fuel injection nozzles (7).
Remove the fuel return line (3) from the engine and remove washers (6) from the fuel injection nozzles (7). Discard the washers.
Install suitable plastic plugs to the fuel injection nozzles. Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Do not let the tops of fuel nozzles turn when the fuel line nuts are loosened or tightened.The nozzles will be damaged if the top of the nozzle turns in the body.The engine will be damaged if a defective fuel injection nozzle is used because the shape of fuel (spray pattern) that comes out of the nozzles will not be correct.
Illustration 3 g00824793
Typical example
Remove the plastic plugs from the fuel injection nozzles (7). Install new washers (6) to the fuel injection nozzles (7) and install the fuel return line (3) to the fuel injection nozzles. Note: The washers (6) have two small holes.
Install the nuts (5) to the fuel injection nozzles (7).
Connect the fuel return hose to the banjo piece and tighten the union nut.
Tighten the nuts (5) to a torque of 27 N m (20 lb ft).
Illustration 4 g00818680
Typical example
Remove the plastic plugs from the fuel injection lines (2) and remove the plastic plugs from the outlet connections of the fuel injection pump. Install the fuel injection lines to the engine as a unit.
Connect the fuel injection lines (2) to the fuel injection pump.
Connect the fuel injection lines (2) to the fuel injection nozzles (7).
Tighten the union nuts (1) to a torque of 23 N m (17 lb ft).
Prime the fuel system. Refer to Systems Operation, Testing and Adjusting, "Fuel System - Prime" for more information.