D250E Series II and D300E Series II Articulated Trucks Caterpillar

Note: Replace the engine air filter secondary element when you service the engine air filter primary element for the third time. If a clean primary element has been installed and the window of the engine air filter service indicator is red, replace the secondary element. Also if the exhaust smoke remains black and a clean primary element has been installed, replace the secondary element.

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Illustration 1	g00600244

1. Release retaining clips (1) .

2. Remove the air cleaner cover and the primary element.

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Illustration 2	g00600142

3. The secondary element is a tight fit in the air cleaner housing. Carefully release the secondary element seal by rocking or twisting the secondary element. Remove the secondary element from the air cleaner housing.

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Illustration 3	g00600143

4. Cover the air inlet opening. Clean the inside of the air cleaner housing.

5. Uncover the air inlet opening. Install a new secondary element.

6. Install the primary element and the air cleaner housing cover. Fasten the retaining clips.