TM 5-6115-593-12 TO 35C2-3-463-1 Section III.  REPAIR PARTS; SPECIAL TOOLS; SPECIAL TEST MEASUREMENT AND DIAGNOSTIC EQUIPMENT (TMDE); AND SPECIAL SUPPORT EQUIPMENT 4-6.    TOOLS  AND  EQUIPMENT.    No  special  tools  or equipment  are  required  by  organizational  maintenance personnel for maintenance of the generator set. 4-7.  MAINTENANCE REPAIR PARTS.  Repair parts   and   equipment   are   listed   and   illustrated   in   the Organization,  Intermediate  (Field)  (Direct  and  General Support)   and   Depot   Maintenance   Repair   Parts   and Special Tools List, (A) TM5-6115-593-24P. Section IV.  LUBRICATION INSTRUCTIONS 4-8.        GENERAL.        This    section    contains    special organizational lubrication instructions not included in the lubrication  order.    Army  personnel  should  refer  to  DA PAM  310-4  and  Marine  Corps  personnel  to  SL-1-3  to ensure  the  latest  edition  of  the  lubrication  order  L05- 6115-593-12 is being used. WARNING To avoid accidental engine cracking or startup, place MAINTENANCE LOCKOUT switch in the MAINTENANCE LOCKOUT position prior   to   servicing   the   generator   set. Return switch to OPERATION position only after completion of service procedures. a. Lubrication Information. (1) When  the  engine  is  not  running,  the  oil level gauge (dip stick) (figure 4-40) allows the  operator  to  check  the  oil  level.    The gauge  is  stamped  with  an  "H"  (high,  full) and  an  "L"  (low)  level  mark  to  indicate lubricating    oil    supply.        The    crankcase should  be  filled  to  the  "H"  mark  on  the dipstick. CAUTION Never  fill  crankcase  above  "H"  mark on dipstick. (2) When the engine is running, check the oil level   using   the   sight   gauge.      Set   sight gauge  high  level  marker  (2,  figure  4-43) while  engine  is  not  running  and  dipstick shows oil at "H" (full).  Set sight gauge low level marker (4, figure 4-43) to indicate oil level  while  engine  is  running.    The  sight gauge  will  then  show  both  operating  and nonoperating levels.  Recheck oil level on dipstick  after  setting  sight  gauge  markers to  ensure  that  no  oil  was  leaking  during the  setting  of  the  markers.    After  setting sight  gauge  level  markers,  use  the  sight gauge  rather  than  the  dipstick  to  monitor oil levels. (3) Keep  oil  free  of  water  and  abrasives  by proper handling and storage. (4) Inspect engine for evidence of oil leaks. (5) After each operating interval of 300 hours, remove  breather  and  clean  with  cleaning solvent,   blow   out   with   compressed   air, and reinstall on engine.  See figure 4-8A. b. Lubricating  Instructions.    Oil  shall  be  changed every 300 hours or 3 months, whichever comes first.  Oil may require changing more frequently than   usual   because   contamination   by   dilution and  sludge  formation  will  increase  under  cold weather operation conditions. (1) Before   draining   the   oil   system,   operate the engine 4-15