The present invention relates to an air cleaner assembly for heavy construction equipment, the air cleaner housing; And a filter member mounted in the housing; Is fixed to one side of the housing, the detector is supported in contact with one side of the filter member; According to the present invention comprising an electronic control controller being electrically coupled to said detectors, installed between the housing and the filter element of the air cleaner state, for example, by detecting a sealing state and the displacement state due to a malfunction of the air cleaner system It can be prevented from occurring an excessive consumption of the wear ttona engine oil in the engine and engine system, when the installation condition of the filter member and the air cleaner housing is detected to be inadequate over a predetermined range to generate an alarm signal quickly cause the driver the repair or replacement can be carried out and maintenance. Excavators, engines, air cleaner, detectors