TM 5-4320-215-12 Section II.  PREVENTIVE MAINTENANCE SERVICES 30.  General To    insure    that    the    equipment    is    ready    for operation at all times, it must be inspected systematically  before  operation,  during  operation,  and after operation, so that defects may be discovered and corrected   before   they   result   in   serious   damage   or failure. The necessary preventive maintenance services  will  be  performed  before  operation.    Defects discovered during operation of the unit will be noted for future  correction  to  be  made  as  soon  as  operation  has ceased.  Stop operations immediately if a deficiency is noticed    during    operation    which    would    damage    the equipment if operation were continued.  After-operation services  will  be  performed  at  intervals  based  on  the normal   operations   of   the   unit.      Reduce   intervals   to Compensate    for    abnormal    conditions.        Defects    or unsatisfactory    operating    characteristics    beyond    the scope of the operator to correct must be reported at the earliest possible opportunity to organizational maintenance.          Responsibility     for     performance     of preventive maintenance services rests not only with the operator,  but  with  the  entire  chain  of  command  from section chief to commanding officer (AR 750-5). 31.  Operator's Daily Services a.  General.  The intervals at which the operator's daily services are to be performed are indicated by an x in  the  appropriate  column,  on  the  small  tab,  located  at the  bottom  of  each  illustration  in  figure  10.    The  tab columns   are   B   (before),   D   (during),   and   A   (after) operation of the equipment.  The intervals and services not illustrated are prescribed in the following subpararaphs. b.  Before-Operation Services. (1)  Visual  Inspection.    Visually  inspect  the entire   pumping   unit   for   damaged   or missing    parts    or    insecure    mounting. Correct all discrepancies or report them to organizational maintenance. (2)  Publications.  Make sure that a copy of this    manual,    TM    5-2805-215-12,    the current  lubrication  order,  and  DA  Form 285,   are   on   or   with   the   unit   and   in serviceable condition. (3) Lubrication.  Lubricate the pumping unit in accordance with the current lubrication order.  For lubrication of the engine, refer to TM 5-2805-20912. (4)    Leaks,    general.        Inspect    the    entire pumping  unit  for  evidence  of  fuel  or  oil leaks.    Correct  all  deficiencies  or  report them to organizational maintenance. c.  During-Operation Services. (1)     Visual     inspection     and     observation. Visually   inspect   the   pumping   unit   for loose  mountings.   Observe  the  pumping unit,   while   in   operation,   for   excessive vibration,   unusual   noises,   overheating, and    smoking.        If    any    of    the    above discrepancies  are  noted,  shut  down  the pumping   unit.      Correct   or   report   the discrepancies to organizational maintenance. (2)  Leaks,  general.      Inspect   the   pumping unit  for  fuel  or  oil  leaks.    Inspect  the suction   and   discharge   lines   for   leaks. Correct or report all leaks to organizational maintenance. d.  After-Operation Services. (1) Lubrication.  Lubricate the pumping unit in accordance with the current lubrication order. (2) Cleaning.  Clean all dirt and grease from the pumping unit. (3)   Protection.      See   that   all   doors   and covers are installed on the pumping unit. If outdoors, cover with a suitable waterproof cover. 32.  Organizational Maintenance a.      Preventive   maintenance   is   performed   by organizational  maintenance  at  quarterly  intervals.    The quarterly interval is equivalent to 3 calendar months .or 250     hours     of     operation,     whichever     occurs     first. 23