Buhler 535 - Manual (Page 143)

4-0
435/485/535
F4-67
F4-9
If the engine coolant is low, add coolant through the
radiator cap () accessed on top of the hood .
CAUTION: THE COOLING SYSTEM OPERATES
UNDER PRESSURE WHICH IS CONTROLLED BY
THE RADIATOR CAP. IT IS DANGEROUS TO REMOVE
THE CAP WHILE THE SYSTEM IS HOT. ALWAYS
TURN THE CAP SLOWLY TO THE FIRST STOP
AND ALLOW THE PRESSURE TO ESCAPE BEFORE
REMOVING THE CAP ENTIRELY. WEAR GLOVES
WHEN REMOVING THE CAP.
The coolant added to the engine must meet specific
requirements . Use a low silicate antifreeze which meets
Engineering Standard GM 6038-M, or which contains
no more than 0 .% anhydrous alkali metasilicate and
meets either Engineering Standard GM 825-M or
GM 899-M, which are performance specifications .
NOTE: Factory fill is a fully formulated coolant mixture
(pink in color). Propylene or ethylene glycol can be
mixed in the cooling system.
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 00 ppm of either
chloride or sulphate .
Antifreeze
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% .
Section 4 - Lubrication & Maintenance
Every 10 Hours or Daily
1
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. Both propylene and ethylene glycol
protection levels (of a mixture of both) can be measured
with the refractometer (P/N: CC2806).
Once the protection level of the coolant is decided
(ratio of water to antifreeze), the mixture must contain
one unit of Cummins DCA4 (dry chemical additive)
per gallon of coolant . A DCA unit is equal to 42 .5
g ( .5 dry ounces) or20 ml (4 liquid ounces) . Your
Buhler Versatile dealer can assist you in obtaining the
DCA4 additive .
IMPORTANT: Failure to maintain DCA4 in the cooling
system will cause cooling system corrosion and engine
failure.
IMPORTANT: The concentration of DCA4 should be
checked with a test kit, available from Cummins /
Fleetguard or through your Buhler Versatile dealer
(P/N: CC2602).
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).
Ethylene Glycol Propylene Glycol
40% -23°C (-0°F) -2°C (-6°F)
50% -37°C (-34°F) -33°C (-27°F)
60% -54°C (-65°F) -40°C (-56°F)
68% -7°C (-90°F) -63°C (-82°F)