User Manual

HOW-TO SECTION
SCA Test Procedures
Detroit Diesel Pow er Trac 3–Way
Coolant Test Strips should be
used to measure nitrite and
glycol concentrations. Part
numbers are Listed in Table 46.
Cavitation/corrosion is indicated
on the strip by the level of nitrite
concentration. Freeze/boil over
protection is determined by glycol
concentration.
HOT COOLANT
To avoid scalding from the
expulsion of hot coolant, never
remove the cooling system
pressure cap while the engine is
at operating temperature. Wear
adequate protective clothing
(face shield, rubber gloves,
apron, and boots). Remove the
cap slowly to relieve pressure.
For best results make the test while
the coolant is between 50 – 140 °F
(10.0–60°C).Waitatleast60,but
not longer than 75, seconds before
reading the nitrite level. Use the test
strips as follows:
1. Dip the strip into coolant for
one second. Remove and shake
briskly to eliminate excess fluid.
2. Immediately compare the pad end
(% glycol) to the color chart on
the container.
3. Sixty seconds (one minute) after
dipping, compare the nitrite pad
to the c olor char t.
4. Color change of the additive
indicator (middle pad) indicates
the presence of inhibitor t hat is
not approved by Detroit Diesel.
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. Part
numbers are listed in Table 4 6 in the
Specifications section. To verify
coolant acceptability, submit a sample
for coolant analysis every three (3)
years, 300,000 miles (4 80,00 0 km),
or 6,000 operating hours, whichever
comes first.
108 All information subject to change without notice. (Rev. 01/04)
DDC-SVC-MAN-0058 Copyright © 2004 DETROIT DIESEL CORPORATION