PUMP GP-PISTON 2885473 - Caterpillar

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The engine air filter primary element is located on the left side of the machine at the rear of the machine.
Open the left side engine compartment access door, if the machine is equipped with engine compartment access doors.
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Remove air cleaner cover (1) .
Remove the engine air filter primary element (2) from the air cleaner housing.
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Clean the inside of the air cleaner housing.
Inspect the primary element. If the pleats, the gaskets, or the seals are damaged, discard the primary element. Replace a damaged primary element with a clean primary element.
Do not clean the primary element by bumping or tapping them. Do not use primary element with damaged pleats, gaskets or seals. Engine damage can result.Make sure the cleaned primary element is completely dry before installing into the air cleaner housing. Water remaining in the primary element can cause false indications of contamination in Scheduled Oil Sampling test results.
If the primary element is not damaged, clean the primary element.The primary element can be cleaned by using the following methods:
Air pressure
Water pressure
Detergent washingWhen you use air pressure, the maximum air pressure is 205 kPa (30 psi). When you use water pressure, the maximum water pressure is 280 kPa (40 psi).
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When you clean the inside pleats and the outside pleats, direct the air along the pleats or direct the water along the pleats.The primary element can be washed in a solution that consists of warm water and of nonsudsing household detergent. Fully rinse the pleats. Allow the primary element to air dry completely.
Inspect the primary element after you clean the primary element. Do not use a primary element if the pleats, the gaskets or the seals are damaged.
Cover the clean primary element. Store the primary element in a clean, dry location.A primary element may be cleaned for a maximum of six times. Also replace the primary element if the primary element has been in service for one year.
Install a clean primary element.
Clean the cover and install the cover.
Reset the engine air filter service indicator.Start the engine. If the yellow piston in the engine air filter service indicator moves into the red zone, install a new primary element. Also if the exhaust smoke is black, install a new primary element. If the piston remains in the red zone after resetting and installing a new primary filter element, replace the engine air filter secondary element. See the Operation and Maintenance Manual, "Engine Air Filter Secondary Element - Replace".
Close the engine compartment access door, if the machine is equipped with engine compartment access doors.