Detroit Diesel 60 Series Operator's Manual page 62

NOAT fully formulated antifreezes are
available as concentrated and pre-
mixed. Concentrated antifreezes should
be mixed at 50% (50% antifreeze/50%
water). NOAT coolants should not be
mixed with conventional coolants. If
they are mixed, no damage will result,
but the long-life advantages of the
NOAT coolant will be lost. In this event,
the coolant should be maintained as a
fully formulated EGI coolant, not as an
OAT coolant.
Detroit Diesel markets a NOAT inhib-
ited ethylene glycol coolant, DDC
Power Cool Plus. Power Cool Plus con-
tains all of the required additives. If a
non-DDC NOAT antifreeze is used, it
must conform to TMC 338 specifica-
tion. Do not add extender to new NOAT
antifreeze or coolant.
Water Only + SCA
Water Only + NOAT Inhibitor
In warm climates a coolant based on
water with corrosion inhibitors is
approved for use. Water-only systems
need to be treated with the proper
Power Cool 3000 Coolant Concentration Limits
Boron
Nitrite
Nitrate
Silicon
Phosphate
pH
Table 14. Power Cool 3000 Concentration Limits (5% Power Cool 3000/95% Water)
dosage of corrosion inhibitors. Detroit
Diesel-approved SCAs or NOAT corro-
sion inhibitors must be added to the
water to provide required corrosion and
cavitation erosion protection. NOAT
inhibitors such as Power Cool Plus
6000 are available for water-only sys-
tems. Inhibitor should be mixed at 7.5%
(pending) by volume with water. Power
Cool products are listed in Tables 21
thru 30. Traditional SCA (Power Cool
3000) can also be used to protect the
engine. Power Cool 3000 coolant con-
centration limits are listed in Table 14.
NOTE:
Do not use Power Trac 3-Way Test
Strips to test NOAT coolant.
Power Cool 3000 SCA inhibitors
should be mixed at 5% by volume with
water. This is 1 quart per 5 gallons of
water. These additions can be made by
adding liquid SCAs available in a variety
of sizes. Coolant filters are also available
for different cooling system capacities.
These filters release the proper amount
of SCA at initial fill.
125 - 500 PPM
800 - 2400 PPM
0 - 750 PPM
50 - 400 PPM
0 PPM Max.
8.0 - 11.0
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