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Operation of Yuchai diesel engine (step 1 )

Jul. 19, 2017


Step one


 Selection of fuel, lubrication oil and coolant


Fuel

The fuel should be selected according to ambient temperature. The selection should comply with light Diesel Fuel(GB252 choice fuel and first class fuel).


Ambient temperature

Above 4

Above -5

Above -14

Above -29

Above-4 4

Light Diesel Fuel #

0#

-10#

-20#

-35#

-50#


Oil

Lubricating oil should be selected according to the ambient condition. The class of oil should not be lower thant CD class of GB11122-1997


Ambient temperature

Summer

Above 0

Above -15

Above -30

Diesel   Fuel #

15W/40CD

15W/30CD

15W/30CD

5W/30CD


Coolant

The coolant should be anti-freezing, especially when the engine is used in the plateau and in cold weather(below 0). It is good for the engine. The most used anti-freezer is glycol-water, which is a mixture of glycol and water( soft water is best. such as well water, spring water or other hard water, it should be mixed 2g tri-sodium phosphate with one liter water for softing). Selection of different proportionality coolant should vary with the ambient temperature.

 

Glycol percentage(%)

Density of   

    glycol-water(g/cm³)

Freezing point ()

28

1.034

-10

38

1.050

-20

48

1.063

-30

55

1.072

-40

60

1.078

-50

68

1.087

-68


Note:

When the percentage of the glycol is above 68%, its freezing point rises. So the percentage of the glycol should not be above 68% when you make up anti-freezer. Glycol is a transparent, viscid, poisonous liquid. Wash your skin with water immediately if it contacts your skin. Glycol is flammable. So, do not weld or light fire when there is coolant leakage.


When there is an emergency, anti-freeze can be replaced by soft water, such as tap water and rain water. Otherwise there will be scale on the wall of water jackets of diesel engine and the deposit will weaken cooling effect and cause the engine to over heat.

   

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