TM 5-4310-451-14 NOTES: 1. ARMY    OIL    ANALYSIS    PROGRAM    (AOAP). For Active Army units, obtain samples from engine every 50 hours of operation or 90 days (whichever comes first). Reserve and  National  Guard  activities  will  use  50  hours or 180 days as the prescribed sample intervals.  Reserve and  National  Guard  equipment  in  frequent  use  during active   training   period   will   adhere   to   the   schedule   for Active  Army  units.    As  a  minimum,  one  sample  from each item of equipment will be submitted for each units’ two week active training period.  Send these samples to the  nearest  AOAP  laboratory.    Refer  to  TB  43-0120  for sampling   instructions.      When   or   if   AOAP   laboratory support is unavailable, hard time intervals will apply. NOTE DO NOT hold oil samples.  Submit oil samples as soon as they have been taken. Seasonal     oil     changes     will     be made due to expected temperatures (see KEY). 2. FOR  OPERATION   OF   EQUIPMENT   IN   PRO- TRACTED  COLD  TEMPERATURES  BELOW  -15°F  (- 26°C).        Remove    lubricants    prescribed    in    Key    for temperatures   above   -15°F   (-26°C).      Relubricate   with lubricants specified in Key for temperatures below -15°F (-26°C).       If    OEA    lubricant    is    required    to    meet    the temperature ranges prescribed in the Key, OEA lubricant is  to  be  used  in  place  of  OE/HDO-10  lubricant  for  all temperature  ranges  where  OE/  HDO-10  is  specified  in the Key. 3.    OIL  CAN  POINTS.    Each   50   hours,   lubricate side    door    hinges,    front     door     hinges,     hand     brake assembly, and linkage with OE/HDO. 4.    ENGINE  OIL  LEVEL  CHECK.    Engine  oil  level should be between "HIGH" and "LOW" marks on dipstick (allow to sit five minutes before checking). 5.    ENGINE.    Oil  is  to  be  changed  each  time  an engine oil change is directed by AOAP laboratory.  When AOAP   laboratory   support   is   not   available,   change   oil each 100 hours.  Drain when oil is warm. 6.    ENGINE  OIL  FILTER.    Filter  is  to  be  replaced each  time  an  engine  oil  change  is  directed  by  AOAP laboratory.        After    installing    new    filter    element,    fill crankcase  and  operate  engine  five  minutes.    Check  for leaks,  check  crankcase  oil  level,  and  bring  to  full  mark. When  AOAP  laboratory  support  is  not  available,  install new filter element each 100 hours. 7.    OIL   SEPARATOR   LEVEL.      Each   10   hours, check level.  Maintain level to full mark with OE/HDO. 8.    OIL SEPARATOR.  Each 500 hours, change oil. Drain when lubricant is warm.  After refill, operate for five minutes, check for leaks, and bring to full mark. 9.    AIR  COMPRESSOR  OIL  FILTER.    Each   100 hours,  remove  filter  element,  clean  housing,  and  install new filter element.  After installing new filter element, fill air compressor, operate for five minutes, check for leaks, and bring to full mark. WARNING DO NOT attempt to clean the element or  reuse  the  element  because  of  its clean   appearance.      Metal   salts   are deposited on the element as the oil is separated  from  the  air.    Pollution  of metal salts on the element will lower the flash point and can cause a fire in the separator.  Destroy used element to pre- vent accidental reuse. 10.    OIL    SEPARATOR    ELEMENT.       Each    4000 hours, replace oil separator element. 11.    WHEEL  BEARINGS.    Annually  remove,  clean, and   pack   wheel   bearings   with   GAA   (see   TM   9-214). 3-6