Common troubles and prevention of combine harvester (1)
1. Damage to the blade caused by damage to the cutting blade, that is, the blade has a notch (gap length of 5 mm or more) or breakage, which will cause cutting knife plug grass, increased cutting resistance, and even damage other components, should be promptly replaced. Preventive methods: During operation, special attention must be paid to obstacles in front of the cutting knife to prevent the blade from cutting hard materials such as iron wire, or colliding with stones, telephone poles, wooden piles, etc. During maintenance, always check and adjust the blade guard so that the stationary blade is in the same horizontal plane. Loose blades must be riveted in time. 2. The cutter bar is generally broken near the cutter head. The main reason is: the cutting resistance is too large or the knife drive mechanism is not installed correctly. After the cutter bar breaks, replace the spare cutter and repair the broken cutter bar. Preventive methods: Check and adjust the cutter to meet the technical requirements. During the operation, the knife and the hard object are prevented from colliding with each other, and the knife resistance is prevented from being too large. Adjust the cutter drive mechanism mounting position to meet the assembly requirements. After the wheat is harvested, the unloaded cutter should be placed on a flat rack in the warehouse or vertically attached to the beam in the warehouse to avoid bending and deformation of the cutter bar. 3. Causes of slippage of the auger auger: The position of the auger is improperly adjusted, and the gap between the screw blade and the knife base is too large, especially when the thin and short crops are harvested, the blades cannot grasp the cut crops and can not be transported in time. Accumulation and blockage before the auger. After using the header auger for 1 year to 2 years, the edge of the spiral blade is smoothed to reduce the pushing efficiency. Prevention method: According to crop density, high and low conditions, reasonable adjustment of the gap between the spiral blade and the bottom plate. When harvesting thin and low crops, the gap can be reduced to about 10 mm; when the edges of the blades are polished, small teeth can be machined with a flat spatula or trowel to increase their gripping and pushing capabilities. 4. Causes of roller jams: The crop is too wet, too dense, and weeds are numerous; walking speed is too fast; the threshing gap is small, or the speed of the drum is low; the drive belt slips; the engine horsepower is insufficient; the draft wheel and the document-manipulator slide without rotation; Not equal. These can cause the roller to clog. If the drum is clogged, turn off the engine, place the indented plate in the lowest position, and pull the roller belt to clean the plug. Preventive measures: harvest as timely as possible; in the harvest of wet, weedy crops, under the premise of guaranteeing threshing quality, the threshing gap should be increased as much as possible; the driver should properly grasp the progress according to the engine load (distinguished by sound) Speed, so that uniform feeding, do not arbitrarily reduce the working throttle; often check and adjust the tightness of the drive belt; correct adjustment of the drum speed, Joystick wood bearing clearance and so on.