Air cleaner having scavenger arrangement for precleaner and filter thereof

An air cleaner construction comprising:

• (a) a precleaner arrangement constructed and arranged for direction of air flow therethrough and selected separation of particulate material from air flow directed therethrough before the air flow is directed outwardly from said precleaner arrangement;
• (b) a filter assembly constructed and arranged to receive selected air flow from said precleaner arrangement and to direct same through a filter arrangement;
• (i) said filter assembly including at least two filter packs therein;
• said at least two filter packs comprising a first filter pack and a second filter pack separated by an intermediate wall panel;
• (c) a scavenger arrangement constructed and arranged to selectively withdraw separated particulate material from both of said precleaner arrangement and said filter assembly;
• said scavenger arrangement including:
• (i) at least one perforated scavenger duct having scavenge apertures oriented to collect particulate material from a space between said first filter pack and said intermediate wall panel;
• and,
• (ii) at least one perforated scavenger duct having scavenge apertures oriented to collect particulate material from a space between said second filter pack and said intermediate wall panel.