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.
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.
Amounts of the Caterpillar ELC
Extender by Cooling System Capacity
Cooling System Capacity
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:
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
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
Drain the coolant into a suitable container.
Dispose of the coolant according to local regulations.
Do not leave an empty SCA filter on an ELC system.
The filter housing may corrode and leak causing an engine
Remove the SCA filter base and plug off or by-pass the
Remove the empty SCA filter and remove the filter
base. Plug the coolant lines or bypass the coolant lines.
Flush the system with clean water in order to remove
Use Caterpillar cleaner to clean the system. Follow the
instructions on the label.
Drain the cleaner into a suitable container. Flush the
cooling system with clean water.
Deposits that remain in the system will be
loosened and removed by the ELC.
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
Fill the cooling system with clean water and operate the
engine until the engine is warmed to 49 to 66C (120 to
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.
Drain the cooling system into a suitable container and
flush the cooling system with clean water.
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 Specifications