ENGINE COOLANT MAINTENANCE
6
COOLANT SERVICE LIFE
Coolant Type Service Life
Commercial Heavy-Duty
Coolant/Antifreeze that 3000 Service Hours
Meets “ASTM D5345” or Two Years
Commercial Heavy-Duty
Coolant/Antifreeze that 3000 Service Hours
Meets “ASTM D4985” or One Year
NOTE:
Do not use a commercial
coolant/antifreeze that only meets the ASTM
D3306 or D4656 specification. This type of
coolant/antifreeze is made for light duty
automotive applications.
CHECKING RESERVOIR TANK
COOLANT LEVEL
(At a Minimum of 25 Hours of Operation)
Ensure that the coolant level of the radiator
reservoir tank is between the upper limit (FULL)
and the lower limit (LOW) on the side of the
reservoir tank.
CLEANING RADIATOR CORE
Visually inspect the core for any obstructions such
as dirt or debris. Use running water to clean
particles from between fins.
IMPORTANT:
Never use hard objects to clean
radiator core, damage to core could result.
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.
