TM  10-4610-241-10 TO   40W4-13-42 Table  2-2.  Operator  Preventive  Maintenance  Checks  and  Services Item No. 14 15 16 17 18 Interval During During During During During Location Item To Check/ Service RO  Pressure  Tubes PIPING Low  Pressure  Lines High  Pressure  Lines Filters (Multimedia  and Cartridge) Dioinization   Cartidges (If  installed) Procedure b. Check Chemical Feed Pump for correct  oil  level.  Add  oil  as  required. c.  Inspect  Chemical  Feed  Pump  for chemical leaks and oil leaks. d. Check to see if each Chemical Feed Head  operates  correctly.  Clean  poppit check valves as required. e.  Inspect  Chemical  Feed  Pump  for cracked  or  broken  hose  couplings, disconnected  flex  hoses  and  loose  or missing attaching hardware. a.  Inspect  RO  Pressure  Tubes  for  leaks. b.  Inspect  front  and  rear  Sampling Valves for leaks. a.  Inspect  Pipes,  Clamps  and  Fittings  for leaks. b.  Inspect  for  cracks,  corrosion  and  loose or missing hardware. a. Inspect Pipes, Clamps and Fittings for leaks. b.  Inspect  for  cracks,  corrosion  and  loose or  missing  hardware. c.  Inspect  High  Pressure  Relief  Valve and  Rupture  Disk  Assembly  for  leaks. a. Inspect  Filter  Tank  for  cracks  and loose  or  missing  mounting  hardware. b.  Inspect  for  leaks around  filter  and  connecting  pipes. Check  Flex  Hoses,  Fittings  and Cartridges  for  leaks. Not  Fully  Mission Capable  If: Oil  level  too  low Class III leaks Chemical  Feed  Heads inoperable Hose  Couplings  cracked or  broken Class III leaks Steady  stream  of  water Hardware missing Class III leaks Hardware   missing Class III leaks Mounting   Hardware missing Steady  stream  of  water Steady  stream  of  water 2-31