PLATE 2809455 - Caterpillar

Service the air filter only with the engine stopped. Engine damage could result.
Always replace the secondary element. Do not attempt to reuse it by cleaning. Engine damage could result.
Note: Replace the secondary element when you service the primary element for the third time. If a clean primary element has been installed but a warning for the air filter still occurs, replace the secondary element. Also replace the secondary element if the exhaust smoke remains black after installation of a clean primary element.
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Open the engine access door on the right side of the machine.
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Remove cover (1) and primary element (2). Reference: Refer to Operation and Maintenance Manual, "Engine Air Filter Primary Element - Clean/Replace" for the correct procedure for servicing the primary element.
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Remove the secondary filter element.
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Cover the air inlet opening. Clean the inside of the air filter housing.
Inspect the gasket between the air inlet pipe and the air cleaner housing. Replace the gasket if the gasket is damaged.
Uncover the air inlet opening. Install a new secondary filter element.
Install a clean primary element and install the cover on the air filter housing. Fasten the clips in order to secure the cover.
Close the engine access door.