C3.3 Industrial Engine Caterpillar

If air enters the fuel system, the air must be purged before the engine can be started. Air can enter the fuel system when the following events occur:

• The fuel tank is empty or the tank has been partially drained during normal operation.

• The low pressure fuel lines are disconnected.

• A leak exists in the low pressure fuel system during engine operation.

• The fuel filter or the fuel pump is replaced.

• The high pressure fuel lines are disconnected.

Delphi DP210 and DP310

The Delphi DP210 and DP310 fuel injection pumps will eliminate the air from the fuel system automatically. Position the starting switch to the RUN position for three minutes. Air in the fuel and the fuel lines will be purged from the system.