PUMP AS 5181860 - Caterpillar

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Open latches (1) on cover (2) and lift the cover.
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Remove retainers (3) from the cover. Remove fresh air filter (4) .
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Remove the filter cover behind the seat. Remove the recirculation filter.
Clean the filter elements with pressure air or wash the filter elements in warm water with a nonsudsing household detergent.
If water was used to wash the filter elements, rinse the filter element in clean water and allow the filter element to air dry thoroughly.
Install the recirculation filter and the filter cover behind the seat.
Install fresh air filter (4) and retainers (3). Close the cover on the outside rear of the cab and close the latches.