IT62G Integrated Toolcarrier and 950G and 962G Wheel Loaders Fuel System - Prime Caterpillar


Fuel System - Prime
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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "AVSpare Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on AVSpare products.

Dispose of all fluids according to local regulations and mandates.


Note: The volume of the air in the water separator is small. Usually, it is not necessary to prime the fuel system if only the water separator element was changed.

  1. Stop the engine and open the engine hood. The fuel priming pump is located above the primary fuel filter on the right side of the machine.


    Illustration 1g00990031
    Manual Priming Pump


    Illustration 2g00700133
    Electric Priming Pump

    Note: Some machines may not be equipped with vent valve (1). In this case, proceed to Step 4.

  2. Open vent valve (1) at the fuel transfer pump and operate priming pump (2) until the fuel that flows from the hose has no air bubbles. This will fill water separator element (3) with fuel.

    Catch the fuel in a suitable container.

    Note: Approximately 100 strokes will be needed with a manual fuel priming pump in order to prime the fuel system to this point. Operate an electric fuel pump for approximately 30 seconds in order to prime the fuel system to this point.

  3. Close vent valve (1).

  4. Open drain valve (4) that is located toward the right side of the fuel filter base. Do not open the drain valve that is located toward the left side of the fuel filter base.

  5. Operate priming pump (2) until fuel that flows from the hose has no air bubbles. This will fill the secondary fuel filters with fuel.

    Catch the fuel in a suitable container.

    Note: Approximately 300 strokes will be needed with a manual priming pump in order to prime the fuel system to this point. Operate an electric fuel pump for approximately 60 seconds in order to prime the fuel system to this point.

  6. Close drain valve (4) on the fuel filter base.

  7. Start the engine.

Note: Additional priming may be needed if you are priming because of the following circumstances:

  • The engine will not start.

  • The engine starts but the engine continues to misfire.

  • The engine starts but the engine continues to emit smoke.

  • The engine has run out of fuel.

  • The fuel injectors have been removed from the engine.

This additional priming will take approximately 100 strokes with a manual fuel priming pump. Operate an electric fuel pump for approximately 30 seconds for this additional priming.

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