146877-1420 ZEXEL 9 461 615 588 BOSCH PLUG 9461615588 1468771420 8971443630

Air Cleaner
Check Service Indicator
Typical service indicator, mounted on the air cleaner housing. Your engine may be equipped with a different indicator.Some vessels are equipped with an inlet air pressure differential gauge. The gauge reads the difference between inlet air pressure before and after the air cleaner. As the air cleaner filter element becomes dirty, the pressure differential rises. If your vessel is equipped with a gauge or some other type of air cleaner service indicator, follow the vessel or air cleaner OEM recommendations for servicing the air cleaner.A service indicator may be mounted on the air cleaner or in a remote location. A colored piston showing in the window indicates the need for servicing the air cleaner.
Typical service indicator.Observe the air cleaner service indicator. Clean or replace the air cleaner filter element when the yellow diaphragm enters the red zone or the red piston locks in the visible position. If the air cleaner indicator shows red at any time, clean the filter element or install a new element.Test Service Indicator
Air cleaner service indicators are inexpensive but important instruments.* Check for ease of resetting. The indicator should reset in less than three pushes.* Check the movement of the yellow core when the engine is accelerated to rated speed. The yellow core should latch approximately at the greatest vacuum that is attained.If the indicator does not reset easily, or if the yellow core does not latch at the greatest vacuum, the indicator should be replaced. If the new indicator will not reset, the indicator sensor hole may be plugged.Severely dusty environments may require frequent indicator replacements. Replace the indicator yearly, regardless of operating conditions. Replace the indicator at Overhaul, and whenever major engine components are replaced. When you install a new indicator, excessive force may crack the top of the indicator. Tighten the indicator to a torque of 2 N m (18 lb in).Service Air Cleaner
Never run the engine without an air cleaner installed. Never run the engine with a damaged air cleaner. Do not use filter elements with damaged pleats, gaskets or seals. Dirt entering the engine causes premature wear and damage to engine components. Air cleaners prevent airborne debris from entering the engine through the air inlet.
Never service the air cleaner with the engine running since this will allow dirt to enter the engine.
If your air cleaner element becomes plugged, the air can split the element filter material. Unfiltered air will drastically accelerate internal engine wear. Your Caterpillar dealer has air filter elements to service this unit. Contact your Caterpillar dealer for the correct filter element.If the air cleaner indicator shows red at any time, clean the filter element or install a new element. Clean or replace air cleaner filter elements at least Every 250 Hours. Severely dusty environments may require more frequent air cleaner service.Refer to the Air Cleaner topic in the Every 250 Hours section of this manual.Air Starter
Check Lubricator Oil Level
Never allow the lubricator bowl (if equipped) to become empty. The starting motor will be