Item No. 18 19 20 21 22 23 24 TM  10-4610-234-13 Table  2-1.  Operator  Preventive  Maintenance  Checks  and  Services.  (cont.) Interval Before Before Before Before Before Before Before Location Item To Check/ Service Tee  Assemblies Nozzle Stand Hypochlorina- tion Unit 350 GPM Pump Connection  Kit Tee  Assemblies Suction  Hoses Gate  Valves Procedure a.  Inspect  tee  fittings  for  cracks, breaks,  and  severe  corrosion. b.  Inspect  couplings  for  cracks  and bent or broken locking arms. in- spect  for  cut,  torn  or  missing  cou- pling  gaskets.  Check  for  missing dust caps and plugs. a. Inspect for bent legs and mis- sing  attaching  hardware. b. Inspect for broken or missing support  chains. Refer to TM 5-4610-233-13&P for operator  PMCS. Inspect  for  loose  coupling  connec- tions. Reconnect and lock loose couplings. a.  Inspect  tee  fittings  for  cracks, breaks  and  severe  corrosion. b.  Inspect  couplings  for  cracks  and bent or broken locking arms. in- spect  for  cut,  torn  or  missing  cou- pling  gaskets.  Check  for  missing dust caps and plugs. a.  Inspect  hoses  for  cuts,  tears, and  deep  abrasions. b.  Inspect  couplings  for  cracks  and bent or broken locking arms. in- spect  for  cut,  torn  or  missing  cou- pling  gaskets.  Check  for  missing dust caps and plugs. a.  Inspect  for  loose  or  missing hand  wheel. b.  Inspect  valve  couplings  for cracks  and  bent  or  broken  locking arms.  Inspect  for  cut,  torn  or  mis- sing  coupling  gaskets.  Check  for missing dust caps and plugs. c.  Rotate  hand  wheel.  Valve  stem should  turn  freely. d.  Check  for  loose  or  missing  bolts and nuts, Not Mission Capable  If: Tee  cracked  or  severely corroded. Coupling  or  gasket  dam- aged.  Gasket  missing. Legs  bent  or  hardware missing. Support  chain  missing, Tee  cracked  or  severely corroded. Coupling  or  gasket  dam- aged.  Gasket  missing. Hoses cut or torn. Couplings  cracked,  bent or broken. Hand  wheel  missing. Coupling  damaged. Gaskets  damaged  or missing. Valve  stem  sticks  or binds. Hardware  missing. 2-9