Generating Power to the World
Page 19 of 25
PTI-15/20-T4F Operators Manual
COOLANT RECOMMENDATIONS
For optimum performance, Power Technology recommends a 1:1 mixture of water /
glycol.
NOTE: Use a mixture that will provide protection against the lowest ambient
temperature.
NOTE: 100 percent pure glycol will freeze at a temperature of –23°C (-9°F).
Most conventional heavy-duty coolant / antifreezes use Ethylene Glycol. Propylene
Glycol may also be used in a 1:1 mixture with water. Ethylene and Propylene Glycol
provide similar protection against freezing and boiling. See the tables below.
ETHYLENE GLYCOL
Freeze Boil
Concentration Protection Protection
50 Percent -36°C (-33°F) 106°C (223°F)
60 Percent -51°C (-60°F) 111°C (232°F)
PROPYLENE GLYCOL
Freeze Boil
Concentration Protection Protection
50 Percent -29°C (-20°F) 106°C (223°F)
NOTE: Do not use Propylene Glycol in concentrations that exceed 50 percent glycol
because of Propylene Glycol’s reduced heat transfer capability. Use Ethylene Glycol in
conditions that require additional protection against boiling or freezing.
CHECKING RADIATOR COOLANT LEVEL
Remove the radiator cap after the engine has completely cooled and check to see that
coolant reaches the supply port.
1. Fill to the bottom of the fill neck and check after every 25 hours of operation.
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