TM 5-3805-296-23-4
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COOLANT LEVEL CHECK
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WARNING
DO NOT service cooling system unless engine has been allowed to cool down. This is a
pressurized cooling system and escaping steam or hot coolant will cause serious burns.
DO NOT remove cooling system radiator cap when engine is hot. Allow engine to cool
down. Loosen cap to first stop and let any pressure out of cooling system, then remove
cap. Failure to follow this warning may cause serious burns.
Wear effective eye, hand, and skin protection when handling coolants. Failure to do so
may cause injury to personnel.
Dispose of all fluids according to local regulations and mandates.
Failure to follow these warnings may cause injury to personnel.
1. Observe sight glass (Figure 5, Item 4) to check level of coolant. If coolant completely fills the sight
glass, coolant level is OK. If coolant level can be seen in the sight glass, coolant level is low.
CAUTION
Do not add water to pre-mixed antifreeze. If water is added to pre-mixed antifreeze, it will
be diluted and will not provide proper engine protection and engine and/or cooling system
damage may occur.
Be sure to identify the type of antifreeze being added, or engine and/or cooling system
damage may occur.
NOTE
Some antifreeze is pre-mixed and requires no water.
Traditional antifreeze requires mixing with an equal amount of water. Mix antifreeze and
water before adding to machine cooling system to ensure proper 1:1 ratio is used.
It is allowable to mix traditional and pre-mixed antifreeze types in the same cooling
system.
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