PIN-PISTON 5247850 - Caterpillar

Always replace the secondary filter element. Never attempt to reuse it by cleaning.The secondary filter element should be replaced at the time the primary element is serviced for the third time.The secondary filter element should also be replaced if the yellow piston in the filter element indicator enters the red zone after installation of a clean primary element, or if the exhaust smoke is still black.
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The air filter housing is located on the left side of the machine. Open the access door.
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In order to remove the air cleaner housing cover (1), turn the eyebolts (2) in a counterclockwise direction.
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Remove the primary filter element (3) .
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Remove the secondary filter element (4) .
Cover the air inlet opening. Clean the inside of the air cleaner housing.
Uncover the air inlet opening. Install a new secondary element (4) .
Install the primary element (3) and the air cleaner housing cover (1). Tighten the cover bolts (2) finger tight. Do not use a tool in order to tighten the cover bolts.
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In order to reset the air filter element indicator, push down on the button on top of the indicator.
Close the engine compartment access door.