Agricultural machinery maintenance eight "minefields" See you recruited?

1. Check the oil in the oil pan of the engine only to see the oil quantity, not the quality. Some agricultural machine operators only add and replenish the oil in the oil pan, and ignore the inspection of the oil quality. Because the oil used for a long time contains a large amount of oxides and metal chips, the oil is thinned and the lubricating performance is lowered. Therefore, it is necessary to add not only the oil according to the requirements of the engine instruction manual, but also to change the oil regularly.

2, only pay attention to the cleaning of fuel, ignoring the cleaning of lubricating oil. When some agricultural operators add fuel to the engine, they only pay attention to the cleanliness of the fuel, and filter it with a strainer or filter cloth, while neglecting the cleaning of the lubricating oil (oil, gear oil). If the lubricating oil is not clean, it will also aggravate the wear and damage of the machine and cause malfunction.

3. Only maintain the air filter, do not maintain the exhaust pipe and muffler. Some agricultural operators only maintain the air filter, never remove the carbon deposits in the exhaust pipe and the muffler, resulting in too much carbon deposit, resulting in exhaust gas exhaustion, engine start-up, power reduction and so on.

4. Add cooling water only, regardless of the cooling effect. Some agricultural operators never remove the scale in the cooling system. Although the cooling water is sufficient, the cooling effect is very poor, causing the engine to overheat and other faults.

5, only pay attention to the state of the valve and valve seat, ignoring the quality of the valve spring. When the valve leaks, the agricultural machine only checks the valve and the valve seat, and ignores the inspection of the valve spring. It should be pointed out that the valve spring has insufficient elasticity and is one of the causes of valve leakage.

6. Check and adjust the valve clearance based on experience and feeling. Some operators do not need special tools to check and adjust the valve clearance. Instead, they use the sway of the valve rocker arm to check and adjust the valve clearance. This has an impact on the operation of the diesel engine, but the fuel consumption is increased. The power is reduced, and the piston and the valve are collided, and even a bad fault such as a rotten piston, a broken crankshaft, or a curved connecting rod is caused.

7. Pay attention only to the quality of the plunger coupler and the nozzle needle valve, and do not pay attention to the quality of the oil outlet valve. The function of the oil discharge valve is to seal, the plunger oil chamber is separated from the high pressure oil pipe lumen at regular intervals to prevent the diesel oil from flowing back; the second is to quickly depressurize the oil supply when the oil supply is stopped, so as to ensure that the fuel injection nozzle is broken. After the oil valve coupler wears, it will cause difficulty in starting the diesel engine and reduce the power.

8. The tightening of the bolt and nut is as good as possible. Some important bolts and nuts on the agricultural machinery have a certain torque regulation when tightening. If the screw is too tight, the bolt will be slipped or even twisted. Therefore, some important bolts and nuts should be tightened according to the specified torque, and they should not be tightened too tightly.

Therefore, to play the role of a good agricultural machine, we need to do the above.

(Original title: Eight major mistakes in agricultural machinery maintenance)