D3-Series Compact Track Loaders (CTL), Multi-Terrain Loaders (MTL), and Skid Steer Loaders (SSL) Caterpillar

Two examples that may cause the fuel system to lose prime are listed here:

• The machine runs out of fuel.

• The Fuel System Filter/Water Separator Element is replaced.

Follow the steps below to prime the fuel system.

Electric Fuel Transfer

1. Ensure that the engine start switch is in the OFF position. Turn the engine start switch to the ON position.

   Note: Do not start the engine. This operation only starts the fuel pump. The pump will run approximately 30 seconds.

2. Attempt to start the engine. If the engine starts and the engine runs rough or the engine misfires, operate the engine at low idle until the engine runs smoothly.

   Note: If the engine fails to start or if the engine continues to misfire or smoke, stop the engine and repeat the procedure. If the problem persists after repeating the procedure, consult your Cat dealer.

Note: Do not open any high-pressure lines to purge air from the fuel system.

Manual Fuel Transfer

Illustration 1	g03822107

1. Open the engine access door. Refer to Operation and Maintenance Manual, "Access Doors and Covers".

2. Push down on the top of the fuel priming pump plunger and release the fuel priming pump plunger to operate the fuel priming pump. Operate the fuel priming pump plunger to fill the new filter element with fuel. Continue to pump until increased resistance is felt. This resistance will indicate that the filter element is full of fuel.

3. Attempt to start the engine. If the engine starts and the engine runs rough or the engine misfires, operate the engine at low idle until the engine runs smoothly. If the engine fails to start or if the engine continues to misfire or smoke repeat the priming procedure.

4. Close the engine access door.