78 SEBU7899-05 Maintenance Section Engine Air Cleaner Element (Dual Element) - Inspect/Clean/Replace Pressurized Air Inspecting the Primary Air Cleaner Elements Personal injury can result from air pressure. Personal injury can result without following prop- er procedure. When using pressure air, wear a pro- tective 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 two times. Pressurized air will not remove deposits of carbon and oil. Use filtered, dry air with a maximum pressure of 207 kPa (30 psi).
g00281693 Illustration 39 Inspect the clean, dry primary air cleaner element. Use a 60W 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. Inspect the primary air cleaner element for light that may show through the filter material. If necessary, compare the primary air cleaner element to a new primary air cleaner element that has the same part number. Do not use a primary air cleaner element that has any tears and/or holes in the filter material. Do not use a primary air cleaner element with damaged pleats, gaskets, or seals.
Discard damaged primary air cleaner elements. g00281692 Illustration 38 Note: 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). Storing Primary Air Cleaner Elements If a primary air cleaner element that passes inspection will not be used, the primary air cleaner element can be stored for future use. To help prevent damage to the paper pleats, aim the hose so that the air flows inside the element along the length of the filter. Do not aim the stream of air directly at the primary air cleaner element. Dirt could be forced further into the pleats. Note:
Refer to “Inspecting the Primary Air Cleaner Elements”. Vacuum Cleaning Vacuum cleaning is a good method for cleaning primary air cleaner elements which require daily cleaning because of a dry, dusty environment. Cleaning with pressurized air is recommended prior to vacuum cleaning. Vacuum cleaning will not remove deposits of carbon and oil. g00281694 Illustration 40 Note: Refer to “Inspecting the Primary Air Cleaner Elements”.