Table. 3-1.1. ORGANIZATIONAL  PREVENTIVE  MAINTENANCE  CHECKS  AND  SERVICES--continued W-WEEKLY (40 HOURS) S-SEMIANNUAL (500 HOURS) ITEM NO. 7 8 9 10 11 12 13 14 15 s — l l l H l l M-MONTHLY(1O0 ITEM TO BE INSPECTED V-belts Air filters Deleted. Engine oil Oil filters Fuel  filters and  strainer: Hydraul sump Hydraul filter ic ic Hydraulic actuator HOURS  ) H-HOURS  (AS  INDICI PROCEDURES Inspect  for worn, frayed, oil soaked, or cracked belts. Check adjustment of V-belts. Pro- per adjustment for fan belt is a deflection of 9/32 inch with ap- plication of 12-14 lb pressure midway between accessory drive pulley. For alternator drive belt, a deflection of 9/64 inch with application of 3-5 lb pres- sure midway between alternator pulley and accessory drive pulley. (Fig. 3-35) This unit is equipped with an air filter condition indicating light that will indicate when the filter elements need cleaning. Clean elements when necessary as indi- cated  by  the  light. Drain engine oil and refill. (Para 3-4c) Change lubricating oil every 300 hours or 6 months. Replace lubricating oil filters. (Para 3-4d) Change lubricating oil filters every 300 hours or 6 months. Replace primary and secondary fuel filters, and clean fuel strainers every  100  hours. (Para 3-34, 3-36, and 3-165 a) Drain and refill hydraulic sump. (Para 3-44) Replace hydraulic filter. (Para 3-45) Clean actuator filter screen. (Para 3-175) ED) EQUIPMENT WILL BE  REPORTED  NOT READY (RED) IF: 3-10 Change 7