TM 55-1930-209-14&P-19 Table 3-3. Preventive Maintenance Checks and Services for ROWPU System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY * f.  Prime chemical metering pump after replacing coagulant or inhibitor. *  Set stroke and speed controls to 100. *  Set control station ONIOFF switch to ON. *  Connect hose to purge air purge valve to collect any air or liquid. *  While pump is priming open air purge valve. *  Close air purge valve when fluid is free of air. *  When pump is primed, turn control station ON/OFF switch to OFF. *  Set chemical metering pump control: STROKE STROKE LENGTH FREQUENCY Coagulant (P2) 50 35 Inhibitor (P4) 100 46 * g.  Make sure membrane cleaning agent (Hydrakleen) drums are full.  If not, replace drums in accordance with item 4 below. 3 * Chemical Agent a.  Check chemical agent drum.Replace if Drum necessary as follows: WARNING Wear safety goggles or face shield and rub- ber gloves while replacing chemical agent drums.  Immediately wash off agent that contacts skin.  If agent touches eyes, Imme- diately flush eyes at eye wash station.  Wash spills with water.  Dry mop to prevent slip- ping. 1)  Close valve RO13 on hose connected to large threaded drum bunghole. 2)  Disconnect hose containing valve RO13. Change 1      3-10