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Causes and Solutions of Serious Burning of Oil in Tiller
At present, when the cultivator is in operation and burning fuel, several issues have been reported. One common problem is that the engine's exhaust pipe emits heavy blue smoke, and some operators even add extra oil to complete their tasks. In extreme cases, they have to carry oil to the field. If these problems are not addressed promptly, it can lead to excessive engine oil consumption and severe carbon buildup in the combustion chamber. This not only reduces engine power but also accelerates wear on internal components, significantly shortening the machine's lifespan. Therefore, it’s essential to understand the causes and implement preventive measures.
First, many tillers operate under overload conditions, which causes diesel to enter the combustion chamber without fully burning, forming carbon deposits. This accelerates wear on parts like the cylinder walls, pistons, and piston rings, allowing oil to seep into the combustion chamber and burn. To prevent this, avoid long-term overloading. When working in the field, ensure the exhaust doesn’t emit black smoke, indicating proper combustion.
Second, new or overhauled machines often aren’t run-in properly, leading to premature wear of the piston, piston rings, and cylinder walls, which can cause oil burning. After purchasing or overhauling a machine, follow the recommended running-in procedure: operate in first, second, and third gears for 30 minutes each, then at 1/3 load for one hour, 2/3 load for two hours, and use reverse gear and air load for 30 minutes. After running normally for a few hours, warm up the engine oil, clean the crankcase, and replace it with fresh diesel.
Third, during engine repairs, if the piston ring is installed incorrectly (e.g., the direction is reversed), it can act as an oil pump, sending excess oil into the combustion chamber and causing oil burning. Always install the piston ring correctly, ensuring the chamfered edge faces the combustion chamber.
Fourth, frequent engine starts can cause dry friction between moving parts, especially when the oil hasn’t had time to circulate. To prevent this, lubricate the engine before starting by cranking the crankshaft a few times. If the machine is parked for less than 15 minutes, keep it idling.
Fifth, prolonged idling leads to poor fuel atomization, uneven fuel-air mixing, and incomplete combustion, resulting in carbon buildup and increased wear. Avoid long idle periods; turn off the engine if parking for more than 15 minutes.
Sixth, opening the throttle too much during startup can flood the cylinder with excess fuel, leading to incomplete combustion and oil burning. Start with a slightly higher idle speed and gradually increase the throttle as needed.
Seventh, sudden changes in throttle position during operation can disrupt the fuel-air mixture, causing uneven combustion and accelerated wear. Adjust the throttle smoothly according to workload.
Eighth, an overfilled oil pan can cause oil to enter the combustion chamber as engine speed increases, leading to oil burning. Check the oil level using the dipstick. The oil should be between the upper and lower marks—too high or too low can cause issues.
Ninth, old or degraded engine oil loses its viscosity, failing to provide proper lubrication and increasing wear. Test oil quality by placing a drop on filter paper. If it appears dark with particles, it needs changing. If it’s light yellow and clear, it’s still usable.
Tenth, using low-quality or too-thin oil can result in inadequate lubrication and oil burning. Check the oil by rubbing it between your fingers—if it feels sticky or has a broken flow, it may be degraded. Use the correct grade: No. 11 in winter and No. 14 in summer.
By following these guidelines, you can significantly reduce oil burning and extend the life of your cultivator. Regular maintenance and proper operation are key to ensuring smooth and efficient performance.