Perkins 400 Series Operation And Maintenance Manual page 51

SEBU7992-05
The anti-corrosion package for ELC is different from
the anti-corrosion package for other coolants. ELC is
an ethylene glycol base coolant. However, ELC
contains organic corrosion inhibitors and antifoam
agents with low amounts of nitrite. Perkins ELC has
been formulated with the correct amount of these
additives to provide superior corrosion protection for
all metals in engine cooling systems.
ELC extends the service life of the coolant to 6000
service hours or three years. ELC does not require a
frequent addition of a Supplemental Coolant Additive
(SCA). An Extender is the only additional
maintenance that is needed at 3000 service hours or
one half of the ELC service life.
ELC is available in a 1:1 premixed cooling solution
with distilled water. The Premixed ELC provides
freeze protection to −36 °C (−33 °F). The Premixed
ELC is recommended for the initial fill of the cooling
system. The Premixed ELC is also recommended for
topping off the cooling system.
ELC Concentrate is also available. ELC Concentrate
can be used to lower the freezing point to −51 °C
(−60 °F) for arctic conditions.
Containers of several sizes are available. Consult
your Perkins dealer or your Perkins distributor for the
part numbers.
ELC Cooling System Maintenance
Correct additions to the Extended Life
Coolant
NOTICE
Use only Perkins products for pre-mixed or concen-
trated coolants.
Use only Perkins Extender with Extended Life
Coolant.
Mixing Extended Life Coolant with other products re-
duces the Extended Life Coolant service life. Failure
to follow the recommendations can reduce cooling
system components life unless appropriate corrective
action is performed.
To maintain the correct balance between the
antifreeze and the additives, you must maintain the
recommended concentration of Extended Life
Coolant (ELC). Lowering the proportion of antifreeze
lowers the proportion of additive. This will lower the
ability of the coolant to protect the system from
pitting, from cavitation, from erosion, and from
deposits.
NOTICE
Do not use a conventional coolant to top-off a cooling
system that is filled with Extended Life Coolant
(ELC).
Do not use standard supplemental coolant additive
(SCA). Only use ELC Extender in cooling systems
that are filled with ELC.
ELC Cooling System Cleaning
Note: If the cooling system is already using ELC,
cleaning agents are not required to be used at the
specified coolant change interval. Cleaning agents
are only required if the system has been
contaminated by the addition of some other type of
coolant or by cooling system damage.
Clean water is the only cleaning agent that is
required when ELC is drained from the cooling
system.
After the cooling system is drained and after the
cooling system is refilled, operate the engine while
the cooling system filler cap is removed. Operate the
engine until the coolant level reaches the normal
operating temperature and until the coolant level
stabilizes. As needed, add the coolant mixture to fill
the system to the specified level.
Changing to Perkins ELC
To change from heavy-duty coolant to the Perkins
ELC, perform the following steps:
NOTICE
Care must be taken to ensure that all fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and the repair of the
product. Be prepared to collect the fluid with suitable
containers before opening any compartment or disas-
sembling any component containing fluids.
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.
3. Flush the system with clean water to remove any
debris.
4. Use Perkins cleaner to clean the system. Follow
the instruction on the label.
5. Drain the cleaner into a suitable container. Flush
the cooling system with clean water.
51
Maintenance Section
Fluid Recommendations