TM10-3950-672-24-2
The system is designed to use a specific quantity of
coolant. If the coolant level is low, the engine will run
hot.
Note: The engine or system has a
leak if frequent addition of coolant is
necessary. Find and repair the leak.
Caution:
The
engine
coolant
passages must be completely filled
with coolant.
During operation entrapped air mixes with the coolant
which results in cavitation corrosion and poor heat
transfer. Highly aerated coolant can cause localized
overheating of the cylinder head and block which can
result in a cracked head, scored cylinder or blown head
gasket.
During filling, air must be vented from the engine
coolant passages. The air vents through the "jiggle pin"
opening and the notched vent hole to the top radiator
hose and out the fill opening.
Note: Adequate venting is provided
for a fill rate of 30 liters/minute [8
U.S. Gallon/minute].
Caution: Never use only water for
engine coolant. In tropical climates
where antifreeze availability may be
limited, use a corrosion inhibitor
(Cummins Liquid DCA) to protect the
engine cooling system.
A mixture of 50% ethylene-glycol base antifreeze is
required for operation of the engine in temperature
environments above -37C [-34F]. A mixture of 40%
water and 60% antifreeze is recommended for
temperatures below -37C [-34F].
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