Buhler 2425 - Manual (Page 288)

SECTION 3 - LUBRICATION AND MAINTENANCE
3-64
EVERY 2000 HOURS OR 2 YEARS
The coolant added to the engine must meet
specific requirements. Use coolant from one of
the following sources:
NOTE: Factory fill is a fully formulated
coolant mixture, (pink in color). Propylene
and ethylene glycol can be mixed in the
cooling system.
A. Refill the cooling system using a low silicate
antifreeze which meets Engineering
Standard GM 6038-M, or which contains no
more than 0.1% anhydrous alkali
metasilicate and meets either Engineering
Standard GM 1825-M or GM 1899-M, which
are performance specifications.
Use soft water in the coolant mixture.
Contaminants in hard water neutralize the
corrosion inhibitor components. Water must
not exceed 300 ppm hardness or contain
more than 100 ppm of either chloride or
sulfate.
Antifreeze must be used in any climate for
both freeze and boiling point protection.
Cummins Engine Company, Inc.
recommends a 50% concentration level,
40% - 60% range of ethylene glycol or
propylene glycol in most climates. Antifreeze
at 68% concentration provides the maximum
freeze protection and must never be
exceeded under any condition. Antifreeze
protection decreases above 68%
Ethylene Glycol Propylene Glycol
40% -23°C (-10°F) -21°C (-6°F)
50% -37°C (-34°F) -33°C (-27°F)
60% -54°C (-65°F) -40°C (-56°F)
68% -71°C (-90°F) -63°C (-82°F)
NOTE: Propylene glycol antifreeze
protection levels CANNOT be checked using
the same hydrometer as would be used with
ethylene glycol antifreeze.
You must check the concentration level
using a refractometer. This tool is available
from your Buhler Versatile dealer under part
#FGCC2800DS. Both propylene and
ethylene glycol protection levels (of a
mixture of both) can be measured with the
refractometer.
Once the protection level of the coolant is
determined (ratio of water to antifreeze), the
mixture must contain one unit of Cummins
DCA4 (dry chemical additive) for every gallon of
mix. A DCA unit is equal to 42.5 g (1.5 dry
ounces) or 120 ml (4 liquid ounces). Your Buhler
Versatile dealer can assist you in obtaining the
DCA4 additive.
IMPORTANT: Failure to maintain the DCA4 in
the cooling system will cause cooling system
corrosion and engine failure.
IMPORTANT: Check the concentration of DCA4
with a test kit, available from Cummins and
Fleetguard through your Buhler Versatile
dealer.
IMPORTANT: Do not add cold coolant to a hot
engine. Engine castings can be damaged. Allow
the engine to cool to below 50°C (120°F).
Start and run the engine until normal operating
temperature is reached. Stop the engine and
allow the coolant to cool.
NOTE: The coolant level will drop as coolant
is pumped around the system.
Remove the radiator cap and add coolant to the
radiator to bring the coolant level to the bottom
of the filler neck. Install the radiator cap.
NOTE: If the engine is not going to be
operated immediately following the coolant
and filter change, run the engine for one
hour to ensure that the chemical conditioner
within the system is dispersed into the
cooling system.
The coolant capacity will vary based on the
tractor model:
Model Capacity
2290 59 L (15.6 gal)
2335 59 L (15.6 gal)
2375 59 L (15.6 gal)
2360 60 L (15.9 gal)
2425 60 L (15.9 gal)