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Combine harvester common faults and exclusion
First, threshing is not clean In order to solve the phenomenon of threshing, through practice, summed up the experience of five inspections. 1. Check the cutting department to see the divider. If you look closely at the harvesting section, if the bifurcations at the right and left ends are in the open state, that is, the distance between the left and right ends of the divergent tip is greater than the cut width, two results will inevitably occur: (1) Near the ends of the divergent tip The length of the crop is shortened due to the oblique cut, and the length of the threshing crops that are sent is different, so that the ears of the crop cannot be gathered together. (2) The amount of crops fed exceeds the threshing capacity of the harvester itself. Both of these results will eventually result in a lack of threshing. Remedy: (1) The tip of the bifurcation of the left and right ends should be aligned with the outermost fixed knife edge of the cutter so that the distance between the left and right ends of the bifurcation tip is equal to the clipping width. (2) The middle three divider points are facing forward. 2. Check the knife and look at the blade. Seriously inspecting the cutting knife, if the cutting tip has mud, the blade clearance is too large, or the blade of the moving knife or the stationary blade is damaged or worn, it will cause the crop to be cut off in time because some crops cannot be cut off in time, so that the length is longer than normal. The harvested crops should be short, so that when the grain is threshed, the crops are of different lengths and the ears are not uniform. Remedy: (1) If the blade is damaged, worn or deformed, it should be replaced in time. (2) Remove dirt and straw from the cutter. (3) Adjust the clearance between the movable knife and the stationary knife (0-0.5mm) so that the movable knife can be moved by hand. 3. Check the threshing drum and see the threshing gap. If the hobbing tooth wears, bends or loosens, the gap between the tooth end of the barrel and the threshing filter becomes large, resulting in a decrease in the threshing effect. Remedy: (1) The thickness of the two striking parts of the teeth of the threshing drum is less than 2.5mm, which means that the wear should be replaced seriously. (2) Correct the curved hobbing gear and tighten the loosened gear rod. 4. Check all kinds of chains to see guide rails and pressure plates. Check the various chains carefully: (1) Loosen the chain at the end of the spike. It will cause the left and right spike end chains to deviate from the guide rails, thus disturbing crop transport. (2) Inadequate tension in the conveyor chain can cause the chain to deviate from the supply rack and the crop cannot be transported. At the same time, the deviation of the position of the conveyor guide can cause disorder in the crop transportation. (3) Excessive gap between chain and chain clamp will cause insufficient clamping force, which will prevent the crop from being perpendicular to the chain during the entire transportation process, and skew occurs, causing the spike end of the crop to be misaligned with a triangular mark. The standard threshing position is the main reason why the threshing is not clean. Remedy: (1) The chain at the end of the spike is too loose, and the two chains can be removed to adjust the tension. (2) Adjust the tension spring to adjust the tension of the conveyor chain. (3) There must be no clearance between the chain and the pressure plate to ensure sufficient clamping force so that the crop always stays perpendicular to the chain during transportation. 5. Check the operation and see the operation. In the harvesting process, if the operator does not perform harvesting strictly in accordance with the operating procedures, the threshing will not be caused. Care should be taken in the operation: (1) Grasp the speed and avoid high-speed harvesting. (2) When harvesting, the engine speed should be 2700r/min or more. (3) The harvesting width should be appropriate, and the distance between the right-side tiller and the right-side crop should be 30cm. (4) The ear end of the crop should be in a standard position marked with a triangle mark. Second, the header transport congestion blockage often occurs at the top of the support chain, left and right feeding sprocket, claw-shaped belt and left and right conveyor chain. The clogging of the upper part of the abutment chain is caused by the harvesting of fallen wet crops. Remedy: Adjust the high-speed sliding guide or change the speed of the abutment, but it should be noted that it should be corrected in time when the track is deformed due to blockage. Should also do the following: (1) timely cleaning feed wheel, chain and claw-shaped pulley at the Department of debris. (2) Adjust the tension of the chain and the claw-shaped belt in time, and replace it if it cannot be adjusted. (3) Each nut should be tightened after replacing the claw belt. Third, the header drive power transmission is not normal The power transmission is not normal divided into the entire head of the work of all working components and some components do not work in two cases. The common cause of the entire header not working is one-way clutch slip. The typical symptom is that all elements of the header do not work. Because the one-way clutch is directly engaged by the wedge roller and the drive shaft, in order to prolong the service life of the drive shaft and avoid disassembling the gearbox due to premature change of the shaft, care should be taken to replace the one-way clutch in time. While some components do not work, it should be clearly identified whether it is a blockage or transmission component damage. Do not disassemble it.