NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 DUST DETECTOR SYSTEM (MODELS AVDS-1790-2CA AND AVDS-1790-2DA) 0035 00 OVERHAUL —Continued Table 2. Overhaul Inspection Procedure for Differential Pressure Switch (OIP 12275842) (Item 3, Figure 1). QA NO. REF. CHARACTERISTIC INSP. REQUISITE REQ. LTR. METHOD 1 Cracks Visual None allowed 2 Loose or missing Visual None allowed screws 3 Loose thread inserts Visual None allowed and damaged or missing threads 4 Damaged threads on Visual None allowed connector 5 Pressure ports for Visual None allowed damaged threads and gouges, nicks, or raised metal on seats 6 Functional test Measure Circuit is normally open. The circuit must close and pop-up button extend when the “HI” pressure exceeds the “LOW” pressure by 5.5 ±.5” Hg. Reset pop-up button and reopen circuit when the differential pressure drops below 3.5” Hg. Electrical rating: 3 amps resistive, 2 amps inductive, at 28 volts dc. 0035 00-5