Sca Test Procedures - Detroit Diesel Series 60 Operator's Manual

HOW-TO SECTION
Nitrite levels must be within the
ranges listed in Table 22.
NOTICE:
Failure to properly maintain coolant
with SCA can result in damage
to the cooling system and its
related components. Conversely,
over-concentration of SCA inhibitor
can result in poor heat transfer,
leading to engine damage.
Always maintain concentrations at
recommended levels. Do not use
traditional SCAs with OAT coolant.
Additional SCA must be added to the
coolant when it becomes depleted, as
indicated by a nitrite concentration
of 900 PPM or less. If the nitrite
concentration is greater than 900
PPM, do not add additional SCA. If
the nitrite concentration is above 3200
PPM, the system is over-inhibited and
should be partially drained and filled
with a 50/50 mix of water and EG or
PG.
In this case the EG or PG should
contain no inhibitors and should
conform to ASTM D4985. This
will dilute the over-concentrated
inhibitors.
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6SE484 0401 Copyright © 2004 DETROIT DIESEL CORPORATION
NOTE:
In non-OAT systems, nitrite
concentration of 5000 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 concentration level at
the next maintenance interval with a
Power Trac 3–Way Test Strip.

SCA Test Procedures

Detroit Diesel Power Trac 3–Way
Coolant Test Strips should be
used to measure nitrite and
glycol concentrations. Part
numbers are listed in Table 47.
Cavitation/corrosion is indicated
on the strip by the level of nitrite
concentration. Freeze/boil over
protection is determined by glycol
concentration.
All information subject to change without notice. (Rev. 01/04)