Getting Prepared Before Starting The Engine - Bison BS-20KVA Operation Manual

In addition, lubricating oil must be kept clean to avoid confusion of lubricating oil of different grades.
(3) Selection of cooling liquids
Like fuel and lubricating oil, cooling liquid is also crucial for diesel engine. Correct selection of cooling
liquids and proper maintenance of cooling system can prevent many failures concerned with the cooling
system, such as overheat of diesel engine, leakage of coolant pump, blockage of radiator and cavitation
erosion of cylinder liner.
Cooling liquid is generally constituted by three ingredients: water (distilled water or deionized water),
additive and glycol.
Either ethylene glycol or propylene glycol can be selected as glycol. Glycol is used as cooling
liquid/coolant for diesel engines providing services for routine and burdensome works. Where glycol
and water are mixed with the same proportion, ethylene glycol and propylene glycol are similar in
performances of boiling and freeze resistance. Performances of cooling liquids are listed below.
Concentration
50%
60%
Concentration
50%
The mixture concentration of propylene glycol must not exceed 50%. In case of extra boiling and freeze
resistance, ethylene glycol is recommended.
Cooling liquids can effectively protect the metal surface of the cooling system. Cooling liquids listed
above can protect diesel engines from freezing and boiling within the temperature range of -45℃ and
106℃ for the whole year.
Cooling liquids must be replaced at least every two years.

10.2 Getting prepared before starting the engine.

(1) Check the oil level of oil pan and keep it between the upper and lower marks of oil gauge;
(2) Check the remaining fuel in fuel tank;
(3) Turn on the switch of fuel tank so that fuel can flow to fuel injection pump;
(4) Discharge air from the fuel system of new engine;
(5) Check the cooling system and refill enough cooling liquids;
Table 10.3 Performances of Cooling Liquids
Ethylene glycol
Freezing point
-36℃
-51℃
Propylene glycol
Freezing point
-29℃
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Boiling point
106℃
111℃
Boiling point
106℃