TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Disassemble 1. Remove two hose clamps (A) and two hoses. 2. Remove two nuts (B) with sleeves and remove long tube (C) and short tube (D) from drain valves. 3. Place the toggle type valve handles in the open position. Remove two nuts (E) and remove two valves from bracket. Assemble 1. Place the toggle type valve handles in the open position. Position two drain valves on bracket and install two nuts (E). 2. Position short tube (D) and long tube (C) in drain valves and install two nuts (B) with sleeves. 3. Install two hoses and hose clamps (A). b. Cleaning, Inspection, and Repair. Refer to paragraphs 6-2 through 6-4. (1) Pressure check fuel / water separator inlet and outlet hoses to a proof pressure of 500 psi. Replace hoses that do not withstand pressure check. (2) Flush drain valve tubes thoroughly with a high pressure cleaning device to assure tubes are cleaned and free of obstructions. Check tubes for cracks, dents, or signs of corrosive deterioration. Inspect tube fittings for burrs or mutilated sealing surfaces. Check drain valves for leakage. Valves that leak must be replaced. c. Assembly. Refer to figures 6-247 and 6-242. The mounting brackets, fuel hoses, and fittings are installed during engine assembly, Chapter 7. Figure 6-247. Disassembling or assembling secondary fuel filter and fuel / water separator drain valves. 6-208