TM 5-3895-382-24 Long Life Coolant/Antifreeze Cooling System Maintenance NOTICE Use only Caterpillar products or commercial products that have passed Caterpillar's EC-1 specification for premixed or concentrated coolants. Use    only    Caterpillar    Extender    with    Long    Life Coolant/Antifreeze. Mixing    Long    Life    Coolant/Antifreeze    with    other products  reduces  the  Long  Life  Coolant/Antifreeze service  life.    Failure  to  follow  the  recommendations included  in  this  section  can  reduce  cooling  system component life. In order to maintain the correct balance of antifreeze and additives,  care  should  be  taken  to  maintain  the  proper Long  Life  Coolant/Antifreeze  concentration.    Reducing the    amount    of    antifreeze    lowers    the    proportion    of additive,  thus  lowering  the  coolants  ability  to  protect  the cooling   system   from   pitting,   cavitation,   erosion,   and deposits. Proper Long Life Coolant/Antifreeze Additions NOTE:   DO   NOT   add   Long   Life   Coolant/Antifreeze Concentrate as a makeup solution for routine cooling system top-off.  Adding concentrated Long   Life   Coolant/Antifreeze   increases   the concentration     of     glycol     in     the     cooling system. During  normal  maintenance,  use  a  premixed  solution  of approved  water  and  Long  Life  Coolant/Antifreeze  as  a top-off  to  the  cooling  system  to  bring  the  coolant  to  the proper   level.      Use   Long   Life   Coolant/Antifreeze   or   a coolant  that  meets  Caterpillar's  EC-1  specification.    If  a coolant that meets EC-1 is not available, use distilled or de-ionized  water  as  a  make-up.    Check  the  glycol  level of  the  cooling  system  with  the   1U-7298  Coolant  Tester (C) or the  1U-7297 Coolant Tester (F).  Use Long Life Coolant/Antifreeze   Concentrate   to   restore   the   proper glycol   concentration   before   the   engine   is   exposed   to freezing temperatures. NOTICE Do not use conventional coolant to top off a cooling system using Long Life Coolant/Antifreeze. Do   not   use   supplemental   coolant   additives   other than  extender  in  cooling  systems  filled  with  Long Life Coolant/Antifreeze. If  a  cooling  system  using  Long  Life  Coolant/Antifreeze has been topped off with a small amount of conventional coolant  or  if  a  supplemental  coolant  additive  was  added to the system by mistake, the system will not be harmed. Should  the  cooling  system  become  contaminated  with conventional   coolant   or   supplemental   coolant   additive exceeding   10   percent   of   the   cooling   system's   total capacity, perform one of the following actions: Drain  the  cooling  system  and  refill  the  cooling system with Long Life Coolant/Antifreeze, or Maintain   the   cooling   system   as   if   the   cooling system is filled with conventional coolant. Long Life Coolant/Antifreeze Cooling System Cleaning NOTE:   No  cleaning  agents  are  to  be  used  when  a cooling system using Long Life Coolant/Antifreeze   is   drained,   flushed,   and refilled. Clean  water  is  the  only  system  cleaning/flushing  agent required  when  Long  Life  Coolant/Antifreeze  is  drained from the cooling system. Long   Life   Coolant/Antifreeze   can   be   recycled.      The drained  coolant  mixture  can  be  distilled  to  separate  the ethylene   glycol   and   water   for   reuse.      Contact   your Caterpillar dealer for more information. After  draining  and  refilling  the  cooling  system,  operate the  engine  with  the  radiator  filler  cap  removed  until  the coolant  reaches  normal  operating  temperature  and  the coolant    level    stabilizes.        Add    coolant    mixture    as necessary to fill the system to the proper level. Maintenance Section Cooling System Specifications 1-26