Since the oil change period is directly related to the technical condition of the diesel engine, the conditions of use, and the quality of the oil, it should also be handled flexibly according to the specific circumstances. If the technical condition of the locomotive is poor and the oil quality is not good, the oil should be changed in advance.

Here are two ways to determine the oil change period.

1. Compare the new engine oil and the used engine oil on the white filter paper. If there are more black spots in the used oil droplets, it indicates that the engine oil is not deteriorating and should not be replaced; if the engine oil is dark brown, then For deterioration, it should be replaced.

2. Use two glass test tubes with a diameter of 0.5 cm and a length of 20 cm to load 19 cm of new engine oil and used engine oil. Seal the two tubes and invert them at the same time to record the rising time of the bubbles. When it exceeds 20%, it indicates that the viscosity of used oil drops too much and should be replaced.

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