PUMP GP-FUEL PRM & SEC FILTER 1915054 - Caterpillar

Do not attempt to start the engine until the fuel injection pump has been primed with fuel and air has been removed from the fuel lines. Serious damage to the fuel injection pump can occur if the system is not correctly primed.
Repeat the priming procedure if the engine fails to start. If the engine starts but the engine continues to misfire, further priming is necessary. If the engine starts but the engine continues to emit smoke, further priming is necessary.If the engine starts but the engine runs rough, continue to run the engine at low idle until the engine runs smoothly.The fuel system does not need to be primed manually. The fuel system is primed automatically by an electric fuel priming pump. In order to activate the electric fuel priming pump, turn the engine start switch to the START position and release the key switch. This process will activate the relay for the electric fuel priming pump which allows power to reach the electric fuel priming pump.
Illustration 1 g01160589
Open the valve (1) in order to bleed air from the fuel system.Note: Allow any fuel to drain into a suitable container.