830044 9 Mercury ECU, Engine Control Unit

Never service the air cleaner element with the engine running since this will allow dirt to enter the engine.
Servicing the Air Cleaner Elements
Note: The air filter system may not have been provided by Caterpillar. The procedure that follows is for a typical air filter system. Refer to the OEM information for the correct procedure.If the air cleaner element becomes plugged, the air can split the material of the air cleaner element. Unfiltered air will drastically accelerate internal engine wear. Refer to the OEM information for the correct air cleaner elements for your application.
Check the precleaner (if equipped) and the dust bowl daily for accumulation of dirt and debris. Remove any dirt and debris, as needed.
Operating in dirty conditions may require more frequent service of the air cleaner element.
The air cleaner element should be replaced at least one time per year. This replacement should be performed regardless of the number of cleanings.Replace the dirty air cleaner elements with clean air cleaner elements. Before installation, the air cleaner elements should be thoroughly checked for tears and/or holes in the filter material. Inspect the gasket or the seal of the air cleaner element for damage. Maintain a supply of suitable air cleaner elements for replacement purposes.Dual Element Air Cleaners
The dual element air cleaner contains a primary air cleaner element and a secondary air cleaner element. The primary air cleaner element can be used up to six times if the element is correctly cleaned and correctly inspected. The primary air cleaner element should be replaced at least one time per year. This replacement should be performed regardless of the number of cleanings.The secondary air cleaner element is not serviceable. Refer to the OEM information for instructions in order to replace the secondary air cleaner element. When the engine is operating in environments that are dusty or dirty, air cleaner elements may require more frequent replacement.
Illustration 1 g00736431
(1) Cover
(2) Primary air cleaner element
(3) Secondary air cleaner element
(4) Air inlet
Remove the cover. Remove the primary air cleaner element.
The secondary air cleaner element should be removed and discarded for every three cleanings of the primary air cleaner element. Note: Refer to "Cleaning the Primary Air Cleaner Elements".
Cover the air inlet with tape in order to keep dirt out.
Clean the inside of the air cleaner cover and body with a clean, dry cloth.
Remove the tapefrom the air inlet. Install the secondary air cleaner element. Install a primary air cleaner element that is new or cleaned.
Install the air cleaner cover.
Reset the air cleaner service indicator. Cleaning the Primary Air Cleaner Elements
Refer to the OEM information in order to determine the number of times that the primary filter element can be cleaned. When the primary air cleaner element is cleaned, check for rips or tears in the filter material. The primary air cleaner element should be replaced at least one time per year. This replacement should be performed regardless of the number of cleanings.
Do not tap or strike the air cleaner element.Do not wash the primary air cleaner element. Use low pressure (207 kPa; 30 psi maximum) pressurised air or vacuum cleaning to clean the primary air cleaner element.Take extreme care in order to avoid damage to the air cleaner elements.Do not use air cleaner elements that have damaged pleats, gaskets or seals.
Refer to the OEM information in order to determine the number of times that the primary air cleaner element can be cleaned. Do not clean the primary air filter element more than three times. The primary air cleaner element must be replaced at least one time per year. Cleaning the air filter element will not extend the life of the air filter element.Visually inspect the primary air cleaner element before cleaning. Inspect air cleaner elements for damage to the pleats, the seals, the gaskets and the outer cover. Discard any damaged air cleaner element.Two methods may be used in order to clean the primary air cleaner element:
Pressurized air
Vacuum cleaningPressurized Air
Personal injury can result from air pressure.Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.
Pressurized air can be used to clean primary air cleaner elements that have not been cleaned more than three times. Use filtered, dry air with a maximum pressure of 207 kPa (30 psi). Pressurized air will not remove deposits of carbon and oil.
Illustration 2 g00281692Note: When the primary air cleaner elements are cleaned, always begin with the clean side (inside) in order to force dirt particles toward the dirty side (outside).Aim the air hose so that air flows along the length of the filter. Follow the direction of the paper pleats in order to prevent damage to the pleats. Do not aim the air directly at the face of the paper pleats.Note: Refer to "Inspecting the Primary Air Cleaner Elements".Vacuum Cleaning
Vacuum cleaning is a good method for removing accumulated dirt from the dirty side (outside) of a primary air cleaner element. Vacuum cleaning is especially useful for cleaning primary air cleaner elements which require daily cleaning because of a dry, dusty environment.Cleaning from the clean side (inside) with pressurized air is recommended prior to vacuum cleaning the dirty side (outside) of a primary air cleaner element.Note: Refer to "Inspecting the Primary Air Cleaner Elements".Inspecting the Primary Air Cleaner Elements
Illustration 3 g00281693Inspect the clean, dry primary air cleaner element. Use a 60 watt blue light in a dark room or in a similar facility. Place the blue light in the primary air cleaner element. Rotate the primary air cleaner element. Inspect the primary air cleaner element for tears and/or holes.