MMD Equipment 150S-6A6 - Manual (Page 51)

5. Periodic Inspection/Maintenance
5-11
5.5.14 Change Coolant
1,000 hours or every 2 years
Taking off radiator cap
Be sure to stop the machine and loosen the radiator cap slowly,
after the coolant water is sufficiently cooled and the inner pressure
is released, then take the cap off.
If this procedure is neglected, the inner pressure can blow off the
cap. Steam jetting out of the radiator could result in causing
scalding. Follow the procedure under all circumstances.
How to handle LLC （ Antifreeze ）
LLC (Antifreeze) is a toxic material.
When a person has drunk LLC (Antifreeze) by accident, make him vomit and make him see a doctor
immediately.
When a person gets LLC (Antifreeze) in his eyes, wash the eyes with clean running water and make
him see a doctor immediately.
When LLC (Antifreeze) is stored, put it in a container with an indication saying "LLC (Antifreeze)
inside" and seal it up, then Keep it in a place away from children.
Beware of flames.
Follow the designated regulations to dispose of LLC (Antifreeze).
Use soft water of good quality such as tap water for coolant.
When water with dirt, sand, and/or dust contained, or hard water such as well water (ground water) is
used, this will cause deposits inside radiator or on cylinder head, and will cause engine overheat due to
poor flow of coolant.
When the unit is used in a cold region and possible freezing is expected, it is recommended to use LLC
(Antifreeze) for the coolant.
Adjust mixing ratio of LLC with water according to the temperature.
Use LLC within the range of its mixing ratio between 35 and 60%.
If LLC in the water exceeds more than 60%, it may decrease its antifreezing effect.
Reference of LLC mixing ratio
Temperature Mixing ratio
−4°F (−20℃) 35%
−40°F (−40℃) 55%
Follow the designated regulations to dispose of LLC (Antifreeze).
H990432
Quality of coolant and antifreeze