Power Tech Generators PTI-25 Operation & Maintenance Manual page 25

The cooling system circulates coolant through the engine where it absorbs excess heat from the
engine. The coolant then flows through the radiator where this waste heat is exhausted to the
atmosphere. Proper maintenance will help prolong the life of your generator set.
Coolant Specifications
It is important to use a high-quality engine coolant. Engine coolant comes in several types. The use
of 50/50 mix of an ethylene glycol type of coolant and clean, soft water is recommended for use in
this generator set. The use of proper coolant helps prevent freezing, boil over, and corrosion.
Coolant Mix
(Antifreeze to
Water)
50/50
Checking the Coolant
!
DANGER
Moving Parts.
Will cause severe injury or
death.
During operation, some parts of the generator set can become extremely hot. To avoid
!
burns, allow the engine to cool sufficiently before checking the coolant level. DO NOT
remove the radiator cap while the radiator is hot. Doing so could result in extremely hot
coolant spraying out. Severe burns may result.
Always stop the engine before checking the coolant level. DO NOT check the coolant level while the
engine is running.
Always put the generator set in OFF mode and activate the Start Inhibit switch (if equipped) before
checking the coolant level. If the generator set is in AUTO mode, the generator set may start
automatically, without warning.
C S M
OOLING YSTEM
Freezing Point
°F °C
-34 -37
!
WARNING
Hot Coolant and Steam
Can cause severe injury or
death.
AINTENANCE
Boiling Point
°F
226
!
WARNING
Hot Engine and Exhaust
System
Can cause severe injury or
death.
°C
108
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