Maintenance methods of tractors for tobacco production
tobacco farmers, it is the spring ploughing season in the tobacco field, which is a critical period for the use of tractors. Www.mechnet com. Cn/"> tractor maintenance is very important. In order to improve labor efficiency, tractor maintenance should be" ten taboos " I hope I can help you
do not tighten the screws and bolts hard.
the screws and bolts in important parts such as the transmission box, cylinder head, wheel hub, connecting rod and front axle of the tractor have special provisions in the instructions for their use tools and tightening torque. If the screws or bolts are tightened manually, it will cause breakage of the screws or bolts, as well as failure caused by thread sliding or screwing. Generally, the tightening torque of ordinary screws or bolts can be tightened by 4 times the compressive capacity of the screw tightening specimen and the tightening torque of its height H0 grain diameter
two taboos: replace the lubricating oil without cleaning the oil has a considerable range.
some agricultural machinery operators lack maintenance common sense or are lazy, and do not clean the oil passage when replacing the lubricating oil, thus laying a potential safety hazard. You should know that there are many mechanical impurities left in the lubricating oil after use. Even if the lubricating oil is drained, there are still impurities in the oil pan and oil circuit. Especially for new or overhauled locomotives, there are more impurities after test run. If the oil duct is not cleaned, it is eager to be put into use, which is easy to cause accidents such as Bush burning and axle holding
three taboos: do not choose lubricating oil according to season
some agricultural machinery operators do not pay attention to choosing lubricating oil according to season. They use summer lubricating oil in winter and winter lubricating oil in summer. They even buy it cheaply regardless of quality, resulting in difficulties in starting locomotives and burning bearing shells. Therefore, the agricultural machinery operators should choose the lubricating oil that has passed the quality inspection and is suitable for the temperature label
four taboos: install the piston and heat it with open fire
the thickness of each part of the piston is uneven, and the degree of thermal expansion and cold contraction is different, which is easy to cause deformation. If the piston is heated with open fire to a certain high temperature, the metal structure will be damaged after natural cooling, which will reduce the wear resistance and greatly shorten the service life
five taboos: apply butter when installing the cylinder gasket
some agricultural machinery operators are used to applying butter when installing the cylinder gasket, thinking that this can increase the tightness of the cylinder, who knows it is counterproductive. Because some of the butter is lost after encountering high temperature, there is a gap between the cylinder gasket, cylinder head and the plane of the engine body, and the high-temperature and high-pressure gas is easy to impact from here, damaging the cylinder gasket and causing air leakage. In addition, the butter under high temperature for a long time will produce carbon deposition, resulting in premature aging and deterioration of the cylinder gasket
six taboos: put the throttle at the maximum oil supply position
when starting the locomotive, some agricultural machinery operators are used to putting the throttle at the maximum oil supply position, which will inevitably cause too much fuel injected into the cylinder and too rich mixture, making it difficult to start. The scientific positioning of throttle is: when the temperature is above 15 ° C, it is slightly higher than idle speed; When the temperature is below 15 ° C, the crankshaft should be idled for several rounds at first. When you feel relaxed, you can start it with a small throttle. In addition, do not blow the throttle, so as to prevent carbon deposition on parts such as cylinders, or accidental failures such as connecting rod bending and crankshaft fracture due to uneven mixing of fuel and air due to high and low rotating speeds
seven taboos: don't check and maintain new cars carefully
some young agricultural mechanization operators mistakenly believe that with the development of science and technology, the current locomotive safety performance is very reliable, so after buying a new car, they don't check and maintain it carefully except for running in and test run, resulting in frequent problems and regret. To this end, the following inspection and maintenance work should be done: first, check whether there is oil in the oil pan of the three-stage air filter. Second, check the fastening of bolts at all parts. Third, check and adjust the injection pressure. Fourth, replace the oil in the oil pan and clean the oil pan and lubricating oil circuit
eight taboos sudden addition of cold water when the water tank "boils"
most agricultural mechanization operators know that the engine is too heavy and will dissolve into the metal into the mold. Load operation, water shortage in the water tank and poor heat dissipation will make the water tank "boils". If the temperature is too high, sudden addition of cold water will lead to "cracking" of the cylinder cover and cylinder block. Therefore, once the water tank is found to be "boiling", agricultural machinery operators should take emergency measures to ensure that the engine cooling water cools down by itself
nine don't speed up to improve labor efficiency
some agricultural mechanization operators think that speeding up to improve labor efficiency is closely related to the amount of fuel consumption. Practice has proved that when the locomotive accelerates from start to medium speed (30 km/h), the fuel consumption of rapid acceleration (25 seconds) is about twice that of slow acceleration (seconds), and rapid acceleration is harmful without any benefit. Therefore, agricultural robot operators should start at low gear and then slowly accelerate
ten taboos: replace brake oil and gear oil with engine oil
in production practice, it is quite common for some agricultural machinery operators to replace brake oil and gear oil with engine oil, resulting in various accidents. You should know that brake oil is the medium for transmitting pressure in the hydraulic braking system of locomotive, and its main components are castor oil and alcohol. It has good solubility, is not easy to precipitate, and has no corrosion. What can the rubber body do when it contacts the rubber body? It will affect the performance and accuracy of the testing machine, and the expansion rate will be reduced. However, engine oil does not have these excellent characteristics. If engine oil is used to replace brake oil and gear oil, it is easy to precipitate and expand the rubber parts of the braking system, which is easy to cause braking failure. Compared with gear oil, the viscosity of engine oil is low, and its pressure resistance, wear resistance and load resistance are also weak. If engine oil is used to replace gear oil, the transmission gear is not easy to hang oil film, and the lubrication effect becomes worse, which will cause the early wear of transmission gear and other adverse phenomena