Perkins 5006A-E23TA Operation And Maintenance Manual page 47

M0122761
Table 8
Ethylene Glycol Concentration
Freeze
Concentration
Protection
−37° C (−29° F)
50 Percent
−52° C (−62° F)
60 Percent
(1) Boiling protection is increased with the use of a pressurized ra-
diator. A system with a 1 bar (14.5 psi) pressure cap at sea lev-
el, will increase the final boiling point of 50 percent coolant to
130° C (266° F).
NOTICE
Do not use propylene glycol in concentrations that
exceed 50 percent glycol because of the reduced
heat transfer capability of propylene glycol. Use ethyl-
ene glycol in conditions that require additional protec-
tion against boiling or freezing.
Table 9
Propylene Glycol Concentration
Freeze
Concentration
Protection
−32° C (−26° F)
50 Percent
(1) Boiling protection is increased with the use of a pressurized ra-
diator. A system with a 1 bar (14.5 psi) pressure cap at sea lev-
el, will increase the final boiling point of 50 percent coolant to
130° C (266° F)
Propylene glycol coolant that is used in the cooling
systems for Perkins diesel engines must meet
"ASTM D6210", "Fully Formulated Glycol-Based
Engine Coolant for Heavy-Duty Engines". When
propylene glycol coolant is used in heavy-duty diesel
engines, a regular addition of SCA is required for
protection. Consult your Perkins distributor for
additional information.
Ethylene or propylene glycols used in cooling
systems for Perkins diesel engines must meet
"ASTM E1177", "Standard Specification for Engine
Coolant Grade Glycol".
To check the concentration of glycol in the coolant,
measure the specific gravity of the coolant.
Coolant Recommendations
• ELC Extended Life Coolant. A coolant that
relies on organic inhibitors for corrosion and
cavitation protection. Also known as Organic Acid
Technology (OAT) coolant.
• ELI
• SCA Supplement Coolant Additive,
concentrated inorganic inhibitor package
• ASTM American Society for Testing and
Materials
(1)
Boil Protection
106° C (223° F)
111° C (232° F)
Boil Protection (1)
106° C (223° F)
Extended Life Inhibitor
The following three glycol-based coolants are
recommended for use in Perkins diesel engines:
Preferred – Perkins ELC
Acceptable – A commercial heavy-duty antifreeze
that meets "ASTM D6210" specifications. Must be
replaced after 2 years.
Adequate – A commercial heavy-duty antifreeze that
meets "ASTM D4985" specifications. Must be
replaced after 1 year.
NOTICE
Do not use a commercial coolant/antifreeze that
only meets the ASTM D3306 specification. This
type of coolant/antifreeze is made for light auto-
motive applications.
NOTICE
A commercial heavy-duty antifreeze that meets
"ASTM D4985" specification requires a treatment
with an SCA at the initial fill. Read the label or the in-
structions that are provided by the manufacturer of
the product.
NOTICE
A commercial heavy-duty antifreeze that meets either
"ASTM D4985" or "ASTM D6210" specification re-
quires the SCA concentration to be checked at 500-
hour service intervals.
Perkins recommends a 50 percent volume (1:1)
glycol and distilled or deionized water of the correct
specification. This mixture will provide optimum
performance as a coolant/antifreeze. This ratio can
be increased to 60 percent volume ethylene glycol to
water if extra freezing protection is required.
For applications not requiring freeze protection, the
following can be used:
Preferred – Perkins ELI
Acceptable – A commercial supplemental coolant
additive (SCA) that meets "ASTM D5752"
specifications.
Maintenance Section
General Coolant Information
47