Volvo D4, Operator'S Manual

Page: 73 / 126

71
Maintenance. Freshwater system
Coolant. Mixture
WARNING! All glycol is hazardous and harmful
to the environment. Do not consume!
Glycol is flammable.
IMPORTANT! Ethylene glycol must not be
mixed with other types of glycol.
Mix:
40 % “Volvo Penta Coolant” (conc. coolant)
60 % water
This mixture protects the engine against internal cor-
rosion, cavitation and frost damage down to -28 °C
(18°F). (Using 60 % glycol lowers the freezing point
to -54 °C (65°F)). Never mix more than 60 % concen-
trate (Volvo Penta Coolant) in the cooling liquid, this
will give reduced cooling effect and increase the risk
of overheating, and will give reduced freezing protec-
tion.
IMPORTANT! Coolant must be mixed with pure
water, use distilled - de-ionized water . The
water must fulfill the requirements specified by
Volvo Penta, see “Water quality”.
IMPORTANT! It is extremely important that the
correct concentration of coolant is added to the
system. Mix in a separate, clean vessel before
adding into the cooling system. Ensure that the
liquids mix properly.
Water quality
ASTM D4985:
Total solid particles ........................................ < 340 ppm
Total hardness:............................................... < 9.5° dH
Chloride ......................................................... < 40 ppm
Sulfate............................................................ < 100 ppm
pH value......................................................... 5,5–9
Silica (acc. ASTM D859)................................ < 20 mg SiO
2
/l
Iron (acc. ASTM D1068) ................................ < 0.10 ppm
Manganese (acc. ASTM D858)...................... < 0.05 ppm
Conductivity (acc. ASTM D1125)................... < 500 μS/cm
Organic content, COD
Mn
(acc. ISO8467) ....... < 15 mg KMnO
4
/l