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Cummins recommends antifreeze/summer coolant for use in
their engines, which can be purchased in concentrate (and
mixed with 50% demineralized water) or pre-diluted. See the
for further details.
Day-to-day addition of coolant is done from the recovery
tank. When adding coolant to the radiator, remove
the radiator cap until the unit has completely cooled. See
Table 10 for engine, radiator, and recovery tank coolant
capacities. Make sure the coolant level in the recovery tank
is always between the “H” and the “L” markings.
When operating in freezing weather, be certain the proper
amount of antifreeze (Table 11) has been added.
If adding coolant/antifreeze mix to the
radiator, remove the radiator cap
until the unit has completely cooled. The
possibility of hot! coolant exists which can
cause severe burns.
Coolant Capacity
Engine and Radiator 15.8 Gal (60 liters)
Reserve Tank N/A
Vol %
Anti-Freeze
Freezing Point
°C °F
50 -37 -34
NOTICE
When the antifreeze is mixed with water, the antifreeze
mixing ratio must be less than 50%.
The engine may overheat if the radiator fins become
overloaded with dust or debris. Periodically clean the
radiator fins with compressed air. Cleaning inside the
machine is dangerous, so clean only with the engine turned
off and the negative battery terminal disconnected.
Periodic cleaning/replacement is necessary. Inspect air
cleaner in accordance with the
.
A slack fan belt may contribute to overheating, or to
insufficient charging of the battery. Inspect the fan belt for
damage and wear and adjust it in accordance with the
The fan belt tension is proper if the fan belt bends 10 to 15
mm (Figure 33) when depressed with the thumb as shown
below.
Figure 33. Fan Belt Tension
NEVER place hands near the belts or fan
while the generator set is running.
INSPECTION/SETUP