Table des Matières
Publicité
74
Chapitre Entretien
Liquides conseillés
REMARQUE
Ne pas utiliser un liquide de refroidissement/antigel
commercial qui serait conforme uniquement à la spé-
cification ASTM D3306. Ce type de liquide de refroi-
dissement/antigel est réservé aux applications
automobiles légères.
REMARQUE
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 ins-
tructions that are provided by the manufacturer of the
product.
REMARQUE
A commercial heavy-duty antifreeze that meets either
"ASTM D4985" or "ASTM D6210" specification requi-
res the SCA concentration to be checked at 500-hour
service intervals.
Perkins recommends a 50% mixture of water and
glycol. This mixture of water and glycol will provide
optimum heavy-duty performance as an antifreeze.
This ratio may be changed to 40% water to 60%
glycol if extra freezing protection is required.
A mixture of SCA inhibitor and water is acceptable
but will not give the same level of corrosion, boiling
and, freezing protection as ELC. Perkins
recommends a 6 percent to 8 percent concentration
of SCA in those cooling systems. Distilled water or
deionized water is preferred.
Refer to Perkins Diesel Engines Fluids
Recommendations, M0113102 for additional
information that relates to coolant.
Tableau 10
Coolant Service Life
Coolant Type
Perkins ELC
Commercial Heavy-Duty Anti-
freeze that meets "ASTM
D6210"
Commercial SCA inhibitor and
Water
(1)
Use the interval that occurs first. The cooling system must also
be flushed out at this time.
Perkins ELC
Perkins provides ELC for use in the following
applications:
• Heavy-duty spark ignited gas engines
• Heavy-duty diesel engines
• Automotive applications
Service Life
(1)
6,000 Service Hours or Three
Years
3000 Service Hours or Two Year
3000 Service Hours or One Year
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 is available in a premixed cooling solution with
distilled water. ELC is a 50 percent by volume of
glycol mixture. 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.
Containers of several sizes are available. Consult
your Perkins distributor for the part numbers.
ELC Cooling System Maintenance
Correct additions to the Extended Life
Coolant
REMARQUE
Use only Perkins products for pre-mixed coolants.
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 ELC. Lowering the
proportion of antifreeze lowers the proportion of
additive. Lowering the ability of the coolant to protect
the system will form pitting, from cavitation, from
erosion, and from deposits.
REMARQUE
Do not use a conventional coolant to top-off a cooling
system that is filled with Extended Life Coolant
(ELC).
Do not use supplemental coolant additive (SCA).
ELC Cooling System Cleaning
Nota: 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.
M0105860-02
Publicité
Table des Matières
