Operators Manual

Table Of Contents
Coolant Maintenance Intervals
The following tables contain the coolant maintenance intervals.
Silicated Organic Acid Technology (Si-OAT) Coolant Additive
Maintenance Procedures
Detroit™ recommends following the manufacturer's recommendations as to
minimum and maximum limits.
Freeze Point Check
To best measure the quality of anti-freeze coolant, a check of the freeze point
(glycol concentration), by refractometer, should be performed at each service
interval to ensure anti-freeze levels are within specification. Detroit™ requires a
freeze point between -31°C and -42°C (-24°F and -44°F) to guarantee optimal
engine protection. The exception would be certain regions that require a freeze
point of (-51°C) -60°F to protect against colder climates.
Laboratory Testing
Laboratory testing is the best practice for determining Silicated Organic Acid
technology (Si-OAT) coolant quality and will provide vital information regarding
the engine performance.
Standard Life Coolant Additive Maintenance Procedures
The concentrations of SLC inhibitors will gradually deplete during normal engine
operation. SCAs replenish the protection for cooling system components and must
be added to the cooling system on an as needed basis. Below are test procedures
that will assist in determining the inhibitor concentration.
Coolant Test Procedure
3-Way Test Strips
Nitrite concentration is an indication of the overall coolant inhibitor concentration
in SLC formulations. These coolants must be tested for nitrite concentration at the
regular intervals as listed in Table "Standard Life Coolant". Detroit™ Genuine
Fluid Analysis 3-Way Test Strips (or equivalent) are recommended. Use these test
strips to measure nitrite and glycol concentrations. Cavitation/corrosion protection
is indicated on the strip by the level of nitrite concentration. Freeze/boil-over
protection is determined by glycol concentration.
Laboratory Testing
As an alternative to the test strips, a factory coolant analysis program is available
through authorized Detroit™ service outlets. To verify coolant acceptability, submit
a sample for coolant analysis according to Table "Standard Life Coolant".
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 175
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