TM-9-1200-215-34&P Technical Manual for M109 Automatic Fire Control System (AFCS) Download
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TM 9–1200–215–34&P 1–20 1–23. PURGE LRU CONTINUED a. SETUP CONTINUED NOTE If the nitrogen tank has already been set up with the regulator and hose assembly attached, skip to step 7. 1. Remove protective cover (1) from nitrogen tank outlet valve (2). 2. Open briefly, then close nitrogen tank outlet valve (2) by turning valve handle (3) to rid outlet valve of foreign matter. 3. Install regulator (4) and nitrogen tank adapter (5) on nitrogen tank outlet valve (2). 4. Install 9/16 inch x 18 tpi threaded adapter (6) in regulator outlet port (7). 5. Attach purging hose assembly (8) to 9/16 inch x 18 tpi threaded adapter (6). 6. Rotate regulator valve (9) to closed position. 7. Open nitrogen tank outlet valve (2) by turning handle (3) slowly until maximum tank pressure registers on regulator high pressure gauge (10). NOTE If the indicated pressure is less than 100 psig, obtain a replacement tank and start this procedure over. 8. Hold purging hose (8) at free end. 9. Open regulator valve (9) slowly until low pressure gauge (1 1) indicates 5 psig. 10. Allow gas to flow from purging hose (8) for approximately 5 seconds to clear hose of any foreign matter. 11. Rotate regulator valve (9) to closed position. 1 2 3 10 9 11 4 7 6 8 5