GASKET-BELL 3B6799 - Caterpillar

Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately.
Illustration 1 g00395938
Fuel supply connections
The fuel system should be primed after a unit injector is changed or when the fuel system is totally dry.Note: The fuel system does not typically need to be primed when the primary fuel filters or secondary fuel filters are changed or when an Electronic Control Module (ECM) is replaced. When the engine is started under these circumstances, the engine may momentarily run rough until the air is purged from the system.
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over any disconnected fuel system components.
Loosen a fuel supply connection to the regulating valve, as shown. Note: The fuel priming pump is located on the primary filter/water separator. Operating the fuel priming pump without loosening a fuel connection upstream of the regulating valve can cause a failure of the fuel transfer pump seal.
Open the fuel priming pump and operate the pump until air is purged and the fuel appears at the fuel connection. Tighten the fuel connection.
Crank the engine after pressurizing the system.
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
If the engine does not start, repeat Steps 1 through 3 in order to start the engine.