Detroit Diesel 60 Series Operator's Manual page 66

In this case the EG or PG should con-
tain no inhibitors, and should conform to
ASTM D4985. This will dilute the over-
concentrated inhibitors.
NOTE:
In non-NOAT systems, nitrite concentra-
tion of 3000 PPM or higher on a Series
60 engine suggests problematic additive
over-concentration. This condition must
be corrected by immediate draining and
flushing of the cooling system. Refill the
system with new fully formulated or pre-
charged coolant. Check the nitrite coN-
centration level at the next maintenance
interval with a PowerTrac 3-Way Test
Strip.
SCA TEST PROCEDURES
Detroit Diesel PowerTrac 3-Way
Coolant Test Strips should be used to
measure nitrite and glycol concentra-
tions. Refer to Table 30 in the
Specifications section for part numbers.
Cavitation/corrosion protection is indi-
cated on the strip by the level of nitrite
concentration. Freeze/boil-over protec-
tion is determined by glycol concentra-
tion. Use the test strips as follows:
1. Dip the strip into coolant for one sec-
ond. Remove and shake briskly to
eliminate excess fluid.
2. Immediately compare end pad (%
Glycol) to the color chart on the con-
tainer.
3. Sixty seconds (one minute) after dip-
ping, compare the nitrite pad to the
color chart.
4. Color change of additive indicator
(middle pad) indicates presence of
inhibitor that is not approved by
Detroit Diesel.
For best results make the tests while
the coolant is between 50° - 140°F
(10.0° - 60°C). Wait at least 60, but not
longer than 75, seconds before reading
the nitrite level. Promptly replace and
tighten the test strip container cap after
each use. Discard unused strips if they
have turned light pink or tan.
A factory coolant analysis program is
available through authorized Detroit
Diesel service outlets. Refer to Table 30
in the Specification section for part num-
bers. To verify coolant acceptability, sub-
mit a sample for coolant analysis every
three (3) years, 300,000 miles, (480,000
km), or 6,000 operating hours, whichev-
er comes first.
NEED RELEASE COOLANT
FILTERS (NON-NOAT SYSTEMS)
Spin-on coolant filters are available for
Detroit Diesel engines. Membranes in
the filters release SCAs before the
coolant approaches a corrosive condi-
tion, protecting the engine from corro-
sion. The elements release the SCA
charge as needed, as opposed to the
maintenance SCA elements, which
instantaneously release the SCA charge.
These elements should be replaced
after 1 year, 120,000 miles, (192,000
km), or 2,000 operating hours, whichev-
er comes first.
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