Perkins 2506 Operation And Maintenance Manual page 50

50
Maintenance Section
Fluid Recommendations
Table 12
Propylene Glycol
Freeze
Concentration
Protection
−29 °C (−20 °F)
50 Percent
To check the concentration of glycol in the coolant,
measure the specific gravity of the coolant.
Coolant Recommendations
The following two coolants are used in Perkins diesel
engines:
Preferred – Perkins Extended Life Coolant (ELC)
Acceptable – A commercial heavy-duty antifreeze
that meets "ASTM D4985" specifications
NOTICE
Do not use a commercial coolant/antifreeze that only
meets the ASTM D3306 specification. This type of
coolant/antifreeze is made for light automotive
applications.
Perkins recommends a 1:1 mixture of water and
glycol. This mixture of water and glycol will provide
optimum heavy-duty performance as a antifreeze.
This ratio may be increased to 1:2 water to glycol if
extra freezing protection is required.
Note: A commercial heavy-duty antifreeze that
meets "ASTM D4985" specifications MAY require a
treatment with an SCA at the initial fill. Read the label
or the instructions that are provided by the OEM of
the product.
In stationary engine applications and marine engine
applications that do not require anti-boil protection or
freeze protection, a mixture of SCA and water is
acceptable. Perkins recommends a six percent to
eight percent concentration of SCA in those cooling
systems. Distilled water or deionized water is
preferred. Water which has the recommended
properties may be used.
Engines that are operating in an ambient temperature
above 43 °C (109.4 °F) must use SCA and water.
Engines that operate in an ambient temperature
above 43 °C (109.4 °F) and below 0 °C (32 °F) due
to seasonal variations consult your Perkins dealer or
your Perkins distributor for the correct level of
protection.
Table 13
Anti-Boil
Protection
106 °C (223 °F)
Commercial Heavy-Duty Anti-
Extended Life Coolant (ELC)
Perkins provides Extended Life Coolant (ELC) for
use in the following applications:
• Heavy-duty spark ignited gas engines
• Heavy-duty diesel engines
• Automotive applications
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 in order to provide superior corrosion
protection for all metals in engine cooling systems.
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.
Coolant Service Life
Coolant Type
Perkins ELC
freeze that meets "ASTM 3000 Service Hours or Two Years
D4985"
Perkins POWERPART SCA 3000 Service Hours or Two Years
Commercial SCA and Water 3000 Service Hours or Two Years
SEBU8313-02
Service Life
6,000 Service Hours or Three
Years