How To Maintain The Mini Excavator In Winter - - Quanzhou Kequenda Engineering Machinery Co., Ltd

Small excavators are also called mini- excavators. The definitions of small excavators are also different. For example, in countries where backhoe loaders are popular (such as Britain, France and Italy), small excavators of 1 to 3 tons are the mainstream. In countries where backhoe loaders are not commonly used (such as Germany), they are more inclined to use 4-6 ton products. However, almost all countries tend to purchase larger equipment. From this we have come to the conclusion that small excavators are defined as backhoe loaders of 1 to 6 tons, which can be called small excavators. Among them, 2.7 to 3.0 tons are used for products. The reason is that they can easily use general transportation vehicles for geo-transportation. Small excavators benefit from their compact body and are mainly used as ideal equipment for earthwork applications in urban areas. It is generally composed of power unit, transmission unit, walking unit and working unit. Principle: Use a bucket to excavate materials above or below the bearing surface, and load them into transport vehicles or unload them to earth-moving machinery at the stockyard. A self-propelled mining machine that loads strips or mineral products from the working surface with a bucket and transports them to the discharge site for unloading. History: It has been more than 130 years since the first manual excavator came out. During this period, it has experienced the development of the steam-driven bucket rotary excavator to the electric drive and internal combustion engine driven rotary excavator, and the fully automatic hydraulic excavator using electromechanical-hydraulic integration technology. Gradually develop the process. Due to the application of hydraulic technology, there were mounted excavators equipped with hydraulic backhoes on tractors in the 1940s. In the early and mid 1950s, towed full-rotation hydraulic excavators and crawler full-hydraulic excavators were successively developed. . The initial trial-produced hydraulic excavators used the hydraulic technology of airplanes and machine tools, and lacked hydraulic components suitable for various working conditions of the excavators, the manufacturing quality was not stable enough, and the supporting parts were not complete. Since the 1960s, hydraulic excavators have entered a stage of promotion and vigorous development. Excavator manufacturers and varieties in various countries have increased rapidly, and output has soared. From 1968 to 1970, the output of hydraulic excavators accounted for 83% of the total output of excavators, which was close to 100%. 1. Preheating of the hydraulic device. When the temperature of the hydraulic oil is low, rapid operation will cause damage to the hydraulic device. 1. The engine of the small excavator runs at a medium speed, and the bucket is operated to warm up; 2. Jack up the machine and rotate the track to preheat the left and right walking motors respectively; 3. Then, increase the speed of the engine to the highest, and allow the bucket and stick to work continuously for 5 minutes; At the same time, pay full attention to the safety of the surrounding environment during warm-up operation. When the temperature is low, people's response will be relatively slow, and it is necessary to prevent touching people and objects around during the warm-up. 2. To warm up the engine of a small excavator, the first step in getting on the car, the engine should be started and run at low speed for 5 minutes. At the same time, the following inspections should be carried out during the preheating of the small excavator engine: 1. Whether the oil warning light is off; 2. Whether there is oil or water leakage; 3. Whether the sound of the engine and the color of exhaust gas are normal; 4. Whether the charging indicator is off; 5. Whether each part of the machine is abnormal. 3. If the small excavator is not used in winter, it should be properly kept and maintained. The best performance can be achieved only when it is used again. The specific maintenance measures are as follows: 1. Clean the dirt on the surface of the small excavator and check for loose fasteners. 2. Check whether the antifreeze liquid level and the engine oil level are normal, check whether the engine oil quality is normal, and check the antifreeze level of the fuel. 3. If the weather is particularly cold and the downtime of the small excavator is very long, please drain the engine coolant cleanly. At the same time, in order to prevent the battery from feeding, the battery must be removed and placed in a warm place for storage. 4. Start the engine once at an interval. If the antifreeze liquid level and the engine oil level are lower than the normal oil level, please add it to the normal level in time before starting. In cold weather, put the key in the preheating position until the preheating light turns on (repeated preheating for many times), and then start the engine. After idling for 5-10 minutes, operate each cylinder without load for 5-10 times, with the maximum ratio each time The stroke is small 5-10MM. Finally, make the engine rotate at the highest speed to quickly operate each cylinder 5-10 times, and operate the left and right rotation and the forward and backward travel 3 times at the same time. Normal operation cannot be performed until the system temperature rises to 50-80 degrees. Continue to operate all working devices for 5-10 minutes and then stop the engine. 5. Diesel should be replaced with -10 to -30 models, depending on the region, the more northerly regions should add-more diesel, in addition, the diesel filter should be replaced, and the oil should be replaced with the local applicable thick The oil should be replaced, and the oil filter should be replaced. If there is oil leakage in the hydraulic system, it should be replaced in time. If possible, the oil tank should be kept warm. 6. The heat dissipation system should be carefully checked for aging and fracture, and if there is any problem, it should be replaced in time because these places are more prone to problems in winter. If you have conditions to provide hot water, it is best to heat the water tank every day to better start the engine, but you must be careful not to forget to release the water. The reason why the addition of antifreeze is not recommended is because it is more difficult to start the engine when adding antifreeze in a particularly cold area.