Lubricating oil, commonly known as engine oil, should be added to agricultural tractors at a level between the upper and lower marks on the dipstick. High-quality lubricating oil is recommended. The following three points should be avoided when adding lubricating oil to a tractor:
1. Avoid adding too much oil. If the engine oil level is too high, exceeding the upper mark on the dipstick, oil can easily enter the combustion chamber, causing oil to spray from the exhaust pipe and emit blue smoke. This not only increases oil consumption but also produces a large amount of carbon deposits on the piston top and valve seats due to incomplete combustion, accelerating wear on mechanical parts and potentially causing piston seizure or damage.
2. Avoid delaying oil addition. Failure to add oil before operation will result in a low oil level in the oil pan, leading to excessively high oil temperature and poor lubrication. More seriously, if the oil level in the oil pan is below the lower mark on the dipstick, the oil strainer may be exposed when the tractor is going downhill, over bumps, or braking suddenly. This can cause the oil pump to draw in air and prevent it from supplying oil, leading to serious accidents such as bearing failure.
Third, never mix new and old engine oil. Old engine oil contains substances with strong oxidizing properties. Mixing new and old oil can reduce the effectiveness of the new oil. If you add all new engine oil to the engine at once, it can last for more than 500 hours. If you mix half new and half old engine oil, the usage time will only be 200 hours. This is because old engine oil has poor lubrication properties and is prone to causing severe wear and tear on the engine and black smoke.
