Navistar MaxxForce DT 9, Operation And Maintenance Manual

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SECTION 5 – MAINTENANCE SCHEDULE AND SERVICE PROCEDURES
Service Procedures (cont.)
COOLANT FREEZE POINT
Service Interval: 24,000 km (15,000 miles), 6 months, or 550
hours
ELC 50/50 Premix provides freeze protection to -36 °C (-34 °F)
and maximum corrosion protection. If a customer wishes to use
a conventional (non-OAT ELC) coolant, it should minimally meet
ASTM D6210, Standard Specification for fully - Formulated
Glycol Base Engine Coolant for Heavy Duty Engines.
ELC
50/50 Premix is used to replenish coolant loss and ensure that
glycol/water concentrations stay in balance.
ELC 50/50 Extender is added at the designated service interval.
Freeze Point Protection Levels Concentrate (ethylene
glycol) and Water Mixtures
Concentrate and Water
Mixtures Freeze Point Protection
40% Concentrate and 60%
water -24.4 °C (-12 °F)
50% Concentrate and 50%
water -36.7 °C (-34 °F)
60% Concentrate and 40%
water -52.0 °C (-62 °F)
67% Concentrate and 33%
water -70.6 °C (-95 °F)
For vehicles operating in extremely cold climates, a coolant
mixture of 60% Concentrate and 40% water or 67% Concentrate
and 33% water provide additional freeze protection as shown in
the table above. Mixtures having more than 67% Concentrate
are not recommended due to the risk of additive fallout.
Check freeze point with a refractometer.
1. Put drop of coolant on refractometer window.
2. Look through eyepiece and focus.
3. Record freeze point.
4. Adjust coolant concentration as necessary to achieve
desired freeze point protection.
FUEL FILTER
Service Interval: 43,300 km (30,000 miles), 12 months, 1,100
hours or 15898 liters (4200 gallons) of fuel
NOTE: Change fuel filter, if optional fuel filter lamp is illuminated.
NOTE: If fuel used has more than average impurities, shorter
service intervals may be required.
Form No. 1172040R1
Printed in the United States of America
Page 79