146670-7520 ZEXEL 9 461 617 191 BOSCH SWITCH 9461617191 1466707520

Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.
1. Remove the bolts holding gasket assemblies (1) and (2) to the cylinder head. 2. Disconnect six fuel injection line nuts (3).
Do not allow the tops of nozzles (4) to turn while the fuel lines are loosened. The nozzles will be damaged if the top of the nozzle turns in the body. Defective fuel nozzles will damage the engine due to incorrect spray patterns.
3. Hold the tops on the fuel nozzles (4) with a wrench and loosen the fuel line nuts at the nozzles.4. Disconnect the fuel injection line nuts at the nozzles and remove the fuel injection lines.5. Install caps and plugs on the nozzles, fuel lines and in the fuel injection pump to keep dirt from contaminating the fuel system. The following steps are for installation.
Do not let the tops of nozzles (4) turn while the fuel lines are tightened. The nozzles will be damaged if the top of the nozzle turns in the body. Defective fuel nozzles will damage the engine due to improper spray patterns.
6. Remove protection covers from the fuel line connections. Place the fuel injection lines in position and install the fuel injection line nuts finger tight. 7. While holding the tops of fuel nozzles (4), use tool (A) and tighten the fuel injection line nuts to a torque of 40 7 N m (30 5 lb ft).8. Tighten the six fuel injection line nuts (3) at the fuel injection pumps to a torque of 40 7 N m (30 5 lb ft).9. Install the bolts that hold brackets (1) and (2) to the cylinder head. Remove the air from the fuel lines*. See the topic, Priming The Fuel System, in the Maintenance Manual.