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FUEL, LUBRICANTS AND COOLANT
9/275, 9/305, 12/250, 17/240, 21/220
AfterMarket Oil Additive Usage
Cummins Inc. does
not
recommend the use of aftermarket oil
additives. The present high-quality fully additive engine lubricating oils
are very sophisticated, with precise amounts of additives blended into
the lubricating oil to meet stringent requirements. These furnished oils
meet performance characteristics that conform to the lubricant industry
standards. Aftermarket lubricating oil additives are
not
necessary to
enhance engine oil performance and, in some cases, can reduce the
furnished oil's capability to protect the engine.
COOLANT RECOMMENDATIONS AND SPECIFICATIONS
Fully Formulated Coolant/Antifreeze
Cummins Inc. recommends the use of fully formulated antifreeze/
coolant meeting Cummins® Engineering Standard (C.E.S.) 14603. For
further details and discussion of coolant for Cummins® engines, refer
to Coolant Requirements and Maintenance, Bulletin 3666132.
Cummins Inc. recommends using either a 50/50 mixture of good-
quality water and fully formulated antifreeze, or fully formulated coolant
when filling the cooling system.
Good-quality water is important for cooling system performance.
Excessive levels of calcium and magnesium contribute to scaling
problems, and excessive levels of chlorides and sulfates cause cooling
system corrosion.
Cummins Inc. recommends Cummins Filtration™ antifreeze coolants
including Compleat ES™ containing DCA4 Plus, Fleetcool™ EX
containing DCA2 Plus, and ES Optimax™ Organic Acid Technology
(OAT), which meet the requirements of Cummins® Engineering
Standard 14603. However, Cummins Inc., Chevron Corporation and
Shell have agreed that Chevron Texaco™, Shell Rotella™ and their
private label counterpart Extended Life OAT coolants, which do
not
meet the elastomer compatibility section of Cummins® Engineering
Standard 14603, are acceptable for extended service interval use,
assuming the initial coolant fill requirements were met from the
vehicle's original equipment manufacturer (OEM).
MidRange, Heavy Duty and High Horsepower engine overhauls, or
repairs involving the replacement of the following components, using
this Extended Life OAT coolant,
must
discard the coolant and replace
it with new coolant.
•
Rocker lever housing gasket
•
Lubricating oil cooler housing gasket
•
Cylinder head gasket
•
Thermostat housing gasket
If the replacement coolant is Chevron Texaco™, Shell Rotella™ or
their private label counterpart Extended Life OAT coolants, which do
not
meet the elastomer compatibility section of Cummins®
Engineering Standard 14603, the coolant
must
be treated by adding
0.24 liters (8 oz) of liquid silicate fluid for every 45.5 liters (12 gal) of
total coolant system volume. It is critical to
not
overtreat the coolant
with silicate fluid.
Fully formulated antifreeze
must
be mixed with good quality water at a
50/50 ratio (40- to 60-percent working range). A 50/50 mixture of
antifreeze and water gives a -36°C (-33°F) freezing point and a 108°C
(226°F) boiling point, which is adequate for locations in North America
and Europe.
The actual lowest freezing point of ethylene glycol antifreeze is at 68
percent. Using higher concentrations of antifreeze will raise the
freezing point of the solution and increase the possibility of a silica gel
problem.
Do
not
use a floating ball hydrometer. Floating ball hydrometers can
give incorrect readings.
WATER QUALITY
Calcium Magnesium
(hardness)
Maximum 170 ppm as
(CaCO3 + MgCO3)
Chloride
40 ppm as (CI)
Sulfur
100 ppm as (SO4)