BUMPER AR-REAR 4934250 - Caterpillar

Clean Air Filters
Clean the filters after 90 days of operation. If the environment dictates, the filters should be cleaned more often. Guidelines for cleaning of the filters are in the following list:
There is excessive dust buildup in the filters.
The filters are deflecting excessively, due to blockage of the air flow.
There are warnings that the system temperatures are steadily increasing.Removal
Open the outer screen door to gain access to the filters. Use a Philips head screwdriver, to loosen the screws in the top and bottom corners of the screen doors.
Remove the air filter. Installation
Place the air filter in the open section of the door. Note: Be sure that the filter is dry, before you install the filter in the door.
Close the outer screen door. Tighten the screws at the top and bottom of the outer screen door, to secure the filter in place.