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 * * * * a.  Check RO block for cracks and leaks. Class III leaks. When replacement of pressure tube seals is necessary, notify shift leader or bargemaster. * b.  Spray end cap on RO block with silicone spray to protect against rust. * * * c.  Check system wiring for damage and Damaged wire. loose connections.  Tighten or replace as required. * d.  If the HP pump diesel engine is operating: 1)  Position valve RO15 from product water flow to overboard flow. 2)  Gradually reduce HP pump diesel engine throttle setting to IDLE.  Leave engine idling. 3)  Open throttle valve R07. 4)  Stop coagulant pump and inhibitor pump at control station by setting ON/ OFF switches to OFF. * e.  Clean RO block membrane: WARNING Wear safety goggles or face shield and rubber gloves while replacing chemical agent drums.  Immediately wash off agent that contacts skin.  If agent touches eyes, immediately flush eyes at eye wash station.  Wash spills with water.  Dry mop to prevent slipping. 1)  Install full drum of membrane cleaning agent (Hydraldeen-20). 2)  Close valve RO13 on hose connected to large threaded drum bunghole. 3)  Disconnect hose containing valve RO13. 4)  Close valve RO14 on hose connected to small threaded drum bunghole. Change 1      3-16