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Note: In this operation manual, the word "coolant" represents a mixture of water and LLC.
Recommended Water for Coolant
Use soft water (such as tap water) for the engine cooling system. The water quality must meet the requirements in
the table below. Basically, the water quality should be within the recommended value, however, up to the limit is
acceptable.
Item
pH (25 °C [77 °F])
Electrical conductivity
(25°C [77°F])
Total hardness
M alkalinity
Chlorine ion
Sulfuric acid ion
Total iron
Silica
Residue from evaporation
Note: Other than those above, turbidity must be below 15 mg/liter.
Long Life Coolant (LLC)
Should coolant or LLC be accidentally swallowed, induce vomiting immediately and seek medical attention. If LLC
should enter eyes, flush immediately with plenty of water and seek medical attention.
Be sure to use Mitsubishi Heavy Industries, Ltd. genuine long life coolant (LLC), "GLASSY long life coolant (ethyl-
ene glycol type)" or "PG GLASSY long life coolant (propylene glycol type)." If you have to use other brand LLCs, be
sure to use the non-amine type LLC that meets the requirements by Mitsubishi Heavy Industries, Ltd.
Mitsubishi heavy industries, Ltd. disclaims the warranty claims about malfunctions due to the use of LLC that does
not meet our requirements.
Genuine LLC
Mitsubishi Heavy Industries, Ltd. recommends the use
of our genuine long life coolant "GLASSY long life
coolant (Ethylene glycol type)", and Eco-friendly prod-
uct "PG GLASSY long life coolant (propylene glycol
type)", which are most appropriate coolant for Mitsubi-
shi diesel engines. Be sure to use our Genuine LLC.
Table 6-1 Water quality standards
Chemical
Unit
symbol
-
-
-
mS/m
CaCO
ppm
3
CaCO
ppm
3
Cl
-
ppm
SO
4 2-
ppm
Fe
ppm
SiO
ppm
2
-
ppm
Chapter 6 COOLANT
Recommend
Limit
value
6.5 to 8.0
6.5 to 8.5
< 25
< 40
< 95
< 100
< 70
< 150
< 100
< 100
< 50
< 100
< 1.0
< 1.0
< 30
< 50
< 250
< 400
Fig. 6-1 GLASSY - LLC
Main adverse effect
Corrosion and rust, scale
formation
Corrosion and rust, scale
formation
Scale formation
Scale formation
Corrosion and rust
Corrosion and rust
Scale formation
Scale formation
Scale formation
6-1
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