RING-BACKUP 3674976 - Caterpillar

Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
Note: Refer to Testing and Adjusting Manual, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.Ensure that all adjustments and repairs are performed by authorized personnel that have had the correct training.If air enters the fuel system, the air must be purged from the fuel system before the engine can be started. Air can enter the fuel system when the following events occur:
The fuel tank is empty or the fuel tank has been partially drained.
The low-pressure fuel lines are disconnected.
A leak exists in the low-pressure fuel system.
The fuel filter is replaced.Use one of the following procedures in order to remove air from the fuel system. If your machine is equipped with a fuel priming switch, then use the Type II procedure. If your machine is not equipped with a fuel priming switch, then use the Type I procedure.Type I
Turn the keyswitch to the RUN position. Leave the keyswitch in the RUN position for 3 minutes.
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Typical example
Crank the engine with the throttle lever in the CLOSED position until the engine starts.Note: If necessary, loosen the union nuts (1) on the fuel injection lines at the connection with the fuel injector until fuel is evident. Stop cranking the engine. Tighten the union nuts (1) to a torque of 30 N m (22 lb ft).
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.
Start the engine and run the engine at idle for 1 minute.
Cycle the throttle lever from the low idle position to the high idle position three times. The cycle time for the throttle lever is one second to 6 seconds for one complete cycle.
Check for leaks in the fuel system.Type II
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Note: The priming pump can only be used when the battery disconnect switch is ON, and the engine start switch key is OFF.
Move switch (2) for the electric fuel priming pump to the ON position. Allow the pump to run for 60 seconds.
Release the switch in order to turn the electric fuel priming pump OFF.
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.
Start the engine. If the engine does not start, or if the engine continues to misfire or smoke, additional priming may be necessary. The electric fuel priming pump will only operate if the engine start switch key is in the OFF position. Shut off the engine before additional priming.
Run the engine at the LOW IDLE position until the engine runs smoothly.