(1) Selection of diesel
Different brands of diesel should be selected according to different ambient temperatures.
(2) Selection of other oils
Select the appropriate oil according to the ambient temperature and purpose. When the ambient temperature is high, oil with high viscosity should be selected;
When the ambient temperature is low, oil with low viscosity should be used. The viscosity of the gear oil is relatively large, in order to adapt to the larger transmission load, the viscosity of the hydraulic oil is relatively small to reduce the flow resistance of the liquid. AP (abbreviation of American Petroleum Institute) has formulated 4 grades of oil quality specifications for different engine requirements.
(3) A little bit of oil selection:
① When the sulfur content of diesel is less than 0.5%, the oil in the oil pan should be replaced according to the standard cycle; when the sulfur content of diesel is between 0.5% and 1.0%, the oil should be replaced within 1/2 standard cycle ; When the sulfur content of diesel is greater than 1.0%, the oil should be replaced within 1/4 standard cycle
② When starting the engine when the ambient temperature is lower than 0°C, ensure that engine oils of SAE0W, SAE10W-30 and SAE5W-40 are used. This should also be the case when the atmospheric temperature reaches around 10°C during the day.
③If APCC grade oil is used as the engine oil, the engine oil replacement interval should be halved.
④ Mixed use of single-grade oil and multi-grade oil is no problem in principle, but it should be ensured that the added single-grade oil meets the temperature in the recommended table.
(4) Selection of antifreeze:
Use permanent antifreeze as much as possible. When it cannot be used due to some cooling reasons, use an antifreeze containing ethylene glycol. When determining the mixing ratio, it is best to underestimate the temperature by about 10°C.
For Kobelco excavators, the recommended mixing ratio of water and antifreeze is: when the operating temperature is -6~40℃, the mixing ratio is 30%. When the operating temperature is -30-30℃, the mixing ratio is 50% (the antifreeze is recommended by Kobelco).
