B  -  Before Item No. W 5 6 7 8 9 TM10-3930-660-10 PREVENTIVE   MAINTENANCE   CHECKS   AND   SERVICES B Interval A D  -  During A-   After W - W e e k ly Item  To  Be  Inspected Procedure:   Check   for   and   repair, fill  or  adjust  as  necessary ENGINE   OIL   LEVEL Check  oil  level  on  dipstick.  Maintain oil  level  to  between  the  “ADD”  and the   “FULL”   marks.   Refer   to LO10-3930-660-12. HYDRAULIC   CYLINDERS Check   the   external   hydraulic   lines   and fittings  for  damage  and  leaks. BATTERIES Do  not  smoke  or  allow  any  open  flame or  spark  in  the  vicinity  while  checking or   filling   batteries.   The   batteries generate   hydrogen   gas,   a   highly explosive   gas.   Personal   injury   or death   can   result. a. b. Check   batteries   and   battery   box for   corrosion   and   obvious   damage. Check   the   electrolyte   level. If  the  level  of  electrolyte  is  below the  top  of  the  battery  plates, notify    Unit    Maintenance. WINDOWS Check   windows   for   obvious   damage and  broken  or  cracked  windows. SEAT  AND  SEAT  BELT a.   Check   seat   belt   for   damage. b.   Check   seat   adjustment   latch. Equipment   Is   Not   Ready/ Available   If: Class  Ill  leaks  are evident. Corrosion   damage   to batteries. Vision  is  distorted  due  to crack   in   windshield. Seat   belt   torn. Seat   latch   inoperative or   broken. 2-19