Perkins 904D-E28T Utilisation Et Entretien page 68

68
Chapitre Entretien
Liquides conseillés
Tableau 10
Propylene Glycol
Concentration
50 Percent
Some commercially available coolants are based on
alternative fluids, such as 1, 3-propanediol (beta-
propylene glycol, PDO), glycerin (glycerol), or
mixtures of these alternatives with ethylene/
propylene glycols. At the time of publication of this
document no industry standard exists for coolants
based on these chemicals. Until such standard/
specifications are published and evaluated, use of
PDO, glycerine, or other alternative coolants are not
recommended in Perkins engines.
To check the concentration of glycol in the coolant,
measure the specific gravity of the coolant.
Coolant Terminology
• 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
• Conventional Coolant
on inorganic inhibitors for corrosion and cavitation
protection
• Hybrid Coolant
corrosion and cavitation protection is based on a
mixture of organic and inorganic inhibitors.
• Extender concentrated organic inhibitor
package
Coolant Recommendations
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.
Freeze Protection
−29 °C (−20 °F)
Extended Life Inhibitor
a coolant that relies
a coolant in which the
REMARQUE
The Perkins industrial engines must be operated
with a 1:1 (50 Percent) mixture of distilled or deio-
nized water and glycol. This concentration allows
the NOx reduction system to operate correctly at
high ambient temperatures.
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 percent volume glycol and
distilled or deionized water of the correct
specification. This mixture will provide optimum
performance as a coolant/antifreeze.
Distilled or deionized water is preferred. Water which
has the recommended properties may be used.
Tableau 11
Coolant Service Life
Coolant Type Service Life
Commercial Hea-
vy-Duty Antifreeze 3000 Service Hours
that meets "ASTM or Two Years
D6210"
Commercial Hea-
vy-Duty Antifreeze 3000 Service Hours
that meets "ASTM or One Year
D4985"
6,000 Service Hours
Perkins ELC
or Three Years
Use the interval that occurs first. The cooling system must also
(1)
be flushed out at this time. These service lives can only be met
if regular coolant sampling, analysis, and proper maintenance
are carried out, with the engine in normal service.
M0108133-03
Required
(1)
Maintenance
SCA at maintenance
intervals
SCA at initial fill and
SCA at maintenance
intervals
-