TM  10-4930-204-13 Table  4-1.  Organizational  Preventive  Maintenance  Checks  and  Services Item No. 1 2 3 4 5 Item To Be Inspected Hoses,   Nozzles, and  Reels Grounding  Cable and Reels Filter/Separator Magnets Spark  Plug Quarterly  Schedule Procedures Check  for  and  have  Repaired, Replaced,  Adjusted  as  necessary Check  hoses  for  leaks,  breaks,  crack cuts  and  worn  areas.  Replace  leaking, worn,  or  damaged  hose.  Check  nozzles for  distortion,  corrosion  and  leaks. Clean  or  replace  distorted,  corroded, or  leaking  nozzles.  Check  reels  for alignment and ease of operation. Check screen in refueling nozzle, (para. 4 -20) Check  cable  for  worn,  frayed  or  cor  - roded  condition.  Check  reel  for  ease of  operation.  Replace  worn,  frayed, or  corroded  cable  and  clips,  (para.  4- 29). Check  for  leaks,  cracks,  or  other damage.  Check  for  leaking,  cracked or  dirty  sight  glass.  Remove  and clean  a  dirty  sight  glass.  Replace washers  to  correct  leaking  condition. Replace  cracked  or  broken  sight  glass Drain  water  as  required.  Observe pressure   gages   during   operation.   Re- place  filter  elements  and  dome  gasket when  discharge  gage  (upper)  has  pres- sure  reading  of  20  psi  less  than  in gage (lower) with engine at full throttle and  both  nozzles  open  (para.  4-27). Replace  pitted  or  burned  magneto points.   Proper   gap  adjustment   is 0.015 inch (0. 038 cm).(Check adjust- ment  every  500  hours.)(para.  4-2). Replace  spark  plugs  that  have  cracked insulators  and  burned  electrodes, Clean  and  set  spark  plug  gaps  for 0.030  inch  (0.076  cm).  Replace  leads which  are  frayed  or  broken.  Clean  and tighten  lead  connections,  (fig.  4-11). For  Readiness  Reporting, Equipment is Not Ready/ Available  If: Evidence  of  fuel leakage.   Nozzles are   inoperative   or leaking  fuel. Broken  cable  or clamp  which  would not  allow  a  proper ground. Evidence  of  leakage. Defective   magnets. Faulty   ignition circuit. 4-8 Change  2