TM 9-2320-387-24-l a. Unit   maintenance, assisted    by  operator/crew, will  perform    checks   and  services   contained     in  table   2-l at  the   following   intervals: (1)  Semiannually. Every    6 months    or  3,000   miles   (4,828   km),   whichever     comes   first. (2)   Annually.     Every  12 months    or  6,000   miles   (9,656   km),   whichever     comes   first. (3)   Biennially. Every    24  months    or  12,000   miles   (19,310   km),   whichever comes   first. b. Refer   to  following    steps   when   performing lubrication checks   and   services: (1)  Intervals. Lubrication services    coincide   with   the   vehicle’s   semiannual preventive maintenance service.    For   this   purpose,    a  10%  tolerance     (variation) in  specified    lubrication point    mileage    is  permissible. Those   vehicles    not   accumulating 1,000  mi  (1,609   km)  in  a  6-month    period   will  be  lubricated at  the   time   of semiannual preventive maintenance service. (21  For  Operation    of  Equipment     in  Protracted    Cold  Temperatures     Below   -15°F   (-26°C). Remove   lubricants prescribed in  lubrication table   for  temperatures above   -15°F   (-26°C).   Relubricate with lubricants specified    in  lubrication table   for  temperatures below   -15°F   (-26°C).   If  OEA  lubricant     is  required, see  the   temperature ranges    prescribed in  the   lubrication table.    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   lubrication table. c. Perform    all  semiannual inspections in  addition    to  annual    inspections at  the   time   of the   annual inspection.     Perform     all  annual    and   semiannual inspections in  addition    to  biennial     inspections at  the   time   of the   biennial    inspection. 2-10. REPORTING REPAIRS - All  vehicle    shortcomings will  be  reported     on  DA form   2404   (DA  Pam   738-7501,   Equipment Inspection     and Maintenance Worksheet, immediately after    the   PMCS,   and   before   taking    corrective action.   All  vehicle deficiencies     will  be  reported     in  the   equipment record. 1    2-l   1.    GENERAL   SERVICE  AND   INSPECTION     PROCEEI a.     While   performing specific   PMCS   procedures, ensure    items   are   correctly     assembled, secure,    not  worn, serviceable, not   leaking,    and   adequately lubricated as  defined    below: (1)  An  item   is  CORRECTLY    ASSEMBLED     when   it  is  in  proper    position    and   all  parts    are   present. (21  When   wires,   nuts,   washers,     hoses,   or  attaching hardware cannot    be  moved    by  hand,   they   are SECURE. (31  An  item   is  WORN   if  there    is  too  much   play   between    joining    parts    or  when    marking    data,   warning, and   caution    plates    are   not   readable. (4)   An  item   is  UNSERVICEABLE if  it  is  worn   beyond    repair    and   is  likely   to  fail  before   the   next scheduled    inspection. (5)   LEAKS.   TM  9-2320-387-10     contains    definitions of  class   I,  II,  and   III   leaks    and   their    effect   on vehicle   operation. (61  If  an  item   meets    the   specified    lubrication requirements, then    it  is  ADEQUATELY     LUBRICATED. b.     Where   the   instruction tighten     appears    in  a  procedure,     you   must   tighten    with   a  wrench    to  the   given torque    value   even   when   the   item   appears     to  be  secure. - 2-3