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Causes and Solutions of Serious Burning of Oil in Tiller
At present, some issues have arisen when the tiller is being used with oil burning. The engine's exhaust pipe emits a noticeable blue smoke, and in some cases, operators have even added extra oil to complete a task. Some workers are forced to transport oil to the field. If these problems are not addressed promptly, it will lead to excessive engine oil consumption, severe carbon buildup in the combustion chamber, reduced engine power, accelerated wear of internal components, and significantly shortened machine life. Therefore, it's essential to understand the causes and take preventive measures.
First, the tiller often operates under heavy load conditions. This causes diesel fuel to enter the combustion chamber without fully burning, forming carbon deposits. It also increases wear on parts like the cylinder walls, pistons, and piston rings, allowing oil to leak into the combustion chamber and burn. To prevent this, avoid long-term overloading. When working in the field, the exhaust should not emit black smoke.
Second, newly purchased or overhauled tillers may not be properly broken in before full operation. This can cause premature wear of the piston, piston rings, and cylinder walls, leading to oil burning. The correct running-in procedure includes operating in I, II, III gears for 30 minutes, at 1/3 load for 1 hour, 2/3 load for 2 hours, and using reverse gear and air load for 30 minutes. After running normally for several hours, the oil should be warmed up, the crankcase cleaned, and fresh diesel oil added.
Third, during engine repair, if the piston ring is installed incorrectly, such as with the wrong side facing the combustion chamber, it can act as an oil pump, sending excess oil into the combustion chamber and causing oil burning. Always ensure that the chamfered edge of the piston ring faces the combustion chamber during installation.
Fourth, frequent engine starts can lead to dry friction between the cylinder liner, piston, and piston rings. This accelerates wear and results in oil burning. To prevent this, lubricate the engine before starting by cranking the crankshaft a few times to ensure proper lubrication. If the machine is parked for less than 15 minutes, keep it idling.
Fifth, long periods of idling can lead to poor fuel atomization and incomplete combustion, increasing carbon buildup and wear. To avoid this, turn off the engine if it's idle for more than 15 minutes.
Sixth, opening the throttle too wide when starting can cause excess oil to enter the cylinder, leading to incomplete combustion and oil burning. Start with a slightly higher idle speed and gradually increase the throttle.
Seventh, sudden changes in throttle position during operation can cause uneven fuel-air mixing and incomplete combustion. Always adjust the throttle smoothly according to workload.
Eighth, overfilling the oil pan can allow oil to enter the combustion chamber as engine speed increases, resulting in oil burning. Check the oil level using the dipstick; it should be between the upper and lower marks. If it's above the upper line, reduce the oil level.
Ninth, old or degraded engine oil lacks proper viscosity, leading to inadequate lubrication and increased wear. Test the oil by placing a drop on filter paper. If it's dark brown with uniform black traces and no particles, it needs to be replaced.
Tenth, poor-quality or overly thin oil can fail to provide proper lubrication, leading to oil burning. Check the oil by rubbing it between your fingers—good oil should flow smoothly without breaking. Its color should be light yellow or reddish, and it should not ignite easily. In winter, use No. 11 diesel oil, and in summer, use No. 14.