PUMP GP-PISTON 2508337 - 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 g01104322
(1) Fuel filter
(2) Plug
(3) Fuel priming pump Priming the fuel system fills the fuel filters. Priming the fuel system also removes air from the fuel system. This procedure is used primarily when the engine runs out of fuel.Note: DO NOT remove plug (2) in the fuel filter base in order to release air from the fuel system during periodic service of the fuel filter. Periodic removal of the plug will result in increased wear of the threads in the fuel filter base. This can lead to fuel leakage. However, the plug in the fuel filter base can be used to purge air from the fuel system if the engine runs out of fuel.
Open fuel priming pump (3) and operate the fuel priming pump until a strong pressure is felt on the fuel priming pump and until the check valve clicks. This procedure will require considerable strokes. Lock the fuel priming pump.
Crank the engine after the system is pressurized.
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, open fuel priming pump (3) and repeat Steps 1 and 2 in order to start the engine.