904B Compact Wheel Loader Caterpillar

Note: Clean the filter elements more often in dusty conditions. If there is a noticeable reduction in the airflow from the air vents, check the filter elements.

Clean External Filter Element

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Illustration 1	g01144815

1. Remove the thumb screws (1) that hold the external cab air filter in place.

2. Remove the filter element. Clean the filter element with compressed air.

3. Install the filter element and replace the thumb screws.

Clean Internal Filter Element

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Illustration 2	g01144817

1. Remove the two nuts (2) that hold the internal cab air filter in place.

2. Remove the filter element. Clean the filter element with compressed air. You can also wash the filter elements with a solution of warm water and of a nonsudsing household detergent.

   Do not wash the filter element while the filter element is installed on the machine.

3. Rinse the filter element in clean water. Air dry the filter element thoroughly.

4. Install the filter element and replace the nuts.