TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220-34 CHAPTER 4 CLEAN AIR SYSTEM ction I. DESCRIPTION. 4-1. General. 111e Clean Air System is composed of the Dust Detector System and the Dust Ejector System. 4-2. Dust Detector System. a. The dust detector system (figs. 4-1 through 4-3) provides dust detection capabilities when dust is being ingested into the engine air induction system. b. The system is composed of two turbosuper- chargers (figs. 4-2 and 4-3) equipped with special compressor housings. The compressor housings include the orifices and filters necessary for dust detection. 'nte compressor housings are connected to pressure switches (figs. 4-2 and 4-3) with high and low pressure hoses, which detect pressure differential. The pressure switches are energized by the engine starter (positive) electrical haess (fig. 4-1 ). c. 1e dust detector system uses engine air induction manifold pressure to circulate air through t he filter strips mounted in the compressor housings. When the filter strip(s) becomes re- stricted from dust ingestion, the pressure switch senses a change in differential pressure. The pressure differential trips the pressure switch plunger(s) (fig. 4-2) and activates the power plant wamfog lamp and special dust wajng lamp in the driver's compartment. Both waing lamps will Hght if either or both pressure switches detect a restriction in U1e filter strip(s). TA265581 Figure 4-1. -Starter, Smoke Generator and Dust Detector System Electrlcal Harness Change 3 1