GAUGE GP-CLUSTER 3168043 - Caterpillar

Never service the air cleaner element with the engine running since this will allow dirt to enter the engine.
Illustration 1 g00103777
Typical service indicator
Observe the service indicator. The air cleaner element should be cleaned or replaced when the yellow diaphragm enters the red zone or the red piston locks in the visible position. If the service indicator appears red at any time, clean the air cleaner element or install a new air cleaner element.An air cleaner differential pressure gauge may either be located in the engine compartment or located on the control panel. The air cleaner differential pressure gauge indicates the difference of the air pressure between the inlet (dirty) side and the engine (clean) side of the filter element. The pressure difference between the two sides increases as the filter becomes plugged.Replace dirty paper elements with new paper elements. Keep spare filter elements on hand for replacement. The element should be thoroughly checked for rips or tears at least every year. A supply of new air filter elements should be maintained.
Replace the air cleaner elements at intervals that are recommended by the air cleaner OEM.
If operating conditions consist of dust, dirt and debris, frequent maintenance of air cleaner elements is necessary.
Service the air cleaner when required by the air cleaner indicator.
Check the precleaner (if equipped) daily for any accumulation of dirt and debris. Remove any dirt and debris, as needed.