Versatile compact air precleaner, air cleaning method and disposable air filter cartridge for air precleaner

A disposable air filter cartridge for use in a powered air precleaner having a motor-driven fan with a fan blade located in a flow path in the powered air precleaner, the disposable air filer cartridge forming part of a separator chamber of the powered air precleaner wherein particulate debris laden air is centrifugally separated and removed from a rotating flow of debris laden air through at least one ejector port located within a wall of the separator chamber, the disposable air filter cartridge comprising:

• a tubular air filter for forming an inner wall of the separator chamber in the powered air precleaner and filtering air from the innermost orbits of a rotating flow of debris laden air in the separator chamber, the tubular air filter having a longitudinally extending internal passage for flowing filtered air from the separator chamber toward an outlet of the powered air precleaner,
• a separator chamber end section securely connected to one end of the tubular air filter as an integral part of the disposable air filter cartridge with said tubular air filter, the separator chamber end section extending radially outwardly from the tubular air filter for forming a portion of the wall of the separator chamber,
• at least one ejector port formed in the separator chamber end section for removal of debris laden air from the rotating flow in the separator chamber, and
• means permitting releasable connection of the disposable air filter cartridge to the powered air precleaner.