ENGINE AR-CORE 3021542 - Caterpillar

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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.
Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately.
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 disconnected fuel system component.
Illustration 1 g00954029
(1) Vent screw on the fuel filter (2) Vent screw on the fuel injection pumpUse the following procedures in order to remove air from the fuel system:
Loosen the vent screw (1) on the fuel filter.
Illustration 2 g00954031
Fuel transfer pump (A) Fuel flow from the primary fuel filter (B) Fuel flow to the fuel injection pump (3) Priming lever
Operate priming lever (3) of the fuel transfer pump untilthe flow of fuel from vent screw (1) is continuous and free of air bubbles.Note: The priming lever of the fuel transfer pump cannot be operated if the cam is at the maximum lift position. If this occurs, the crankshaft must be rotated one revolution.
Tighten vent screw (1) .
Loosen vent screw (2) on fuel injection pump (4) .
Operate the priming lever (3) for the fuel transfer pump until the flow of fuel from vent screw (2) is continuous and free of air bubbles.
Tighten vent screw (2) .
Crank the engine. Start the engine. The engine may run rough. Run the engine at low idle until the engine runs smoothly. If the engine will not start, further priming may be necessary. If the engine starts and if the engine continues to misfire or smoke, one or more of the following conditions may be present:
The fuel system requires more priming.
There may be an air leak in the fuel system.