TM 5-3895-383-24 ELC Cooling System Maintenance Caterpillar ELC Extender Caterpillar ELC Extender is a liquid that is added to the cooling system halfway through the ELC service life. NOTICE When using Caterpillar ELC, do not use standard SCA's or SCA   filters.      To   avoid   SCA   contamination   of   an   ELC system,  remove  the  SCA  filter  base  and  plug  off  or  by- pass the coolant lines. The  cooing  system  should  be  treated  with  Extender  at  3000 hours (one-half of the service life).  Use Table 19 to determine the required amount of the Caterpillar Extender. Table 19 Amounts of the Caterpillar ELC Extender by Cooling System Capacity Cooling System Capacity Recommended Amount of Caterpillar Extender 22 to L (6 to 8 US gal) 0.57 L (20 fl oz) 31 to 38 L (8 to 10 US gal) 0.71 L (24 fl oz) 39 to 49 L (10 to 13 US gal) 0.95 L (32 fl oz) 50 to 64 L (3 to 17 US gal) 1.18 L (40 fl oz) 65 to 83 L (17 to 22 US gal) 1.60 L (54 fl oz) 84 to 114 L (22 to 30 US gal) 2.15 L (72 fl oz) 115 to 163 L (30 to 43 US gal) 3.00 L (100 fl oz) 164 to 242 L (43 to 64 US gal) 4.40 L (148 fl oz) Changing to Caterpillar ELC To change from heavy-duty coolant/antifreeze to the Caterpillar ELC, perform the following steps: NOTICE Care  must  be  taken  to  ensure  that  fluids  are  contained during  performance  of  inspection,  maintenance,  testing, adjusting and repair of the product.  Be prepared to collect the   fluid   with   suitable   containers   before   opening   any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500 "Caterpillar Tools and Shop Products Guide' for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose  of  all  fluids  according  to  local  regulations  and mandates. 1. Drain the coolant into a suitable container. 2. Dispose of the coolant according to local regulations. NOTICE Do not leave an empty SCA filter on an ELC system. The filter housing may corrode and leak causing an engine failure. Remove  the  SCA  filter  base  and  plug  off  or  by-pass  the coolant lines. 3. Remove   the   empty   SCA   filter   and   remove   the   filter base.  Plug the coolant lines or bypass the coolant lines. 4. Flush  the  system  with  clean  water  in  order  to  remove any debris. 5. Use Caterpillar cleaner to clean the system.  Follow the instructions on the label. 6. Drain  the  cleaner  into  a  suitable  container.    Flush  the cooling system with clean water. NOTE: Deposits    that    remain    in    the    system    will    be loosened and removed by the ELC. 7. In systems with heavy deposits, it may be necessary to disconnect  the  hoses.    Clean  the  deposits  and  debris from  the  hoses  and  the  fittings.    Install  the  hoses  and tighten the hose fittings.  Pipe threads may also need to be cleaned and sealed.  Seal the threads with 5P-3413 Pipe Sealant. 8. Fill the cooling system with clean water and operate the engine until the engine is warmed to 49 to 66C (120 to 150F). NOTICE Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal components. To  avoid  damage  to  the  cooling  system,  make  sure  to completely   flush   the   cooling   system   with   clear   water. Continue to flush the system until all signs of the cleaning agent are gone. 9. Drain the cooling system into a suitable container and flush the cooling system with clean water. NOTE: The  cooing  system  cleaner  must  be  thoroughly flushed from the cooling system.  Cooling system cleaner that is left in the system will contaminate the  coolant.    The  cleaner  may  also  corrode  the cooling system. Maintenance Section Cooling System Specifications 1-26