330C Excavator Caterpillar

Prime the fuel system in order to fill the fuel filter, and prime the fuel system in order to purge trapped air. The fuel system should be primed under the following conditions:

• The fuel tank is running low.

• The machine is being stored.

• The fuel filter is being replaced.

Electric Priming Pump

(S/N: CGZ1-541CAP1-1257JCD1-298JNK1-259)

1. Open the access door on the left side of the machine.

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Illustration 1	g01172643
(1) Fuel Priming Pump (2) Fuel Filter (3) Drain Valve (inlet) (4) Drain Valve (outlet)

Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.

2. Open the drain valve (3). Allow the fuel to drain into a suitable container.

3. Turn the start switch key to the ON position. Keep the start switch key in the ON position until a steady flow of fuel comes out of the drain hose. Then, close the drain valve.

4. Open the drain valve (4). Allow the fuel in the filter (2) to drain into a suitable container.

5. Turn the start switch key to the ON position in order to fill the filter element with fuel. Keep the start switch key in the ON position until a steady flow of fuel comes out of the drain hose. Then, close the drain valve.

   Note: The fuel system should be primed within ten minutes. If the time was more than ten minutes, change the filter element and repeat the priming procedures.

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NOTICE
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.

6. Start the engine. If the engine starts but the engine runs rough, allow the engine to run at low idle. Continue to run the engine at low idle until the engine runs smoothly.

7. Close the access door on the left side of the machine.

Manual Priming Pump

(S/N: CGZ542-UPCAP1258-UPJCD299-UPJNK260-UP)

1. Open the access door on the left side of the machine.

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Illustration 2	g01172857
(1) Fuel Filter (2) Fuel Drain (inlet) (3) Fuel Drain (outlet) (4) Priming Pump

Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.

2. Open the drain valve (2). Allow the fuel to drain into a suitable container.

3. Unlock the fuel priming pump (4) and operate the fuel priming pump plunger until fuel flows out of the drain hose. Then, close the drain valve (2) .

4. Open the drain valve (3). Allow the fuel in the fuel filter (1) to drain into a suitable container.

5. Operate the fuel priming pump plunger until fuel flows out of the drain hose. Then, close the drain valve (3) .

6. Push in the priming pump plunger and lock the pump plunger by hand.

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NOTICE
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.

7. Start the engine. If the engine starts but the engine runs rough, allow the engine to run at low idle. Continue to run the engine at low idle until the engine runs smoothly.

8. If the engine does not start, or if the engine misfires, additional priming may be required. Repeat steps 2 through 6.

9. Close the access door on the left side of the machine.