The use of machinery to return straw to the field can increase soil organic matter content, increase soil fertility, and promote continuous crop yield increase. When using straw returning machine, please pay attention to the following issues:

1. Preparation before operation: It is necessary to carefully check whether the connection of various parts is reliable, whether the fasteners are loose, and whether the rotating parts are flexible. To inspect the tool holder and the blade one by one and find that the deformation is damaged or lacking, it should be repaired, replaced or supplemented in time. And to check the adjustment of the tension of the V-belt, add lubricant and grease as required. At the same time, after hanging it properly, it is necessary to run it for 3-5 minutes until it is confirmed that all parts are operating normally.

2. Operation operation points: After the unit enters the ground, it is necessary to first adjust the tractor's suspension rods so that the front, rear, left, and right sides of the machine are kept horizontal, and the height of the depth limiter wheel is adjusted properly to maintain a reasonable stubble height and to prevent the blade from getting into the ground. According to the density and growth of crops, soil moisture content and firmness, different operating speeds should be adopted, and the tension of the transmission belt should be observed at any time. If it is too loose and too tight, it should be adjusted in time. When connecting the power output shaft, it is necessary to load at a low speed. After the engine accelerates to the rated speed, the unit can start to load slowly. It is forbidden to bring the load to the field returning machine or the unit to start too much, so as not to damage the mechanical parts, nor allow the load to turn or reverse, and the power is cut off when the unit transfers the land. It is forbidden for non-operators to be close to the crew or follow the machine to ensure personal safety.

3. Maintenance after operation: The soil layer on the rotating parts and the soil layer contaminated by the inner wall of the guard plate shall be promptly removed, and the rotating parts and fasteners shall be inspected and adjusted and replaced in time to add grease to each lubricator. When it is not used for a long time, the exposed parts should be treated with anti-corrosion treatment. The blades should be coated with oil and stored in a dry, ventilated and light-transparent storage room. If they are stored in the open air, rain protection and sun protection facilities should be added.

4. Common faults and troubleshooting methods: 1 poor crushing quality. The main reason is that the drive belt is too loose, the blade is worn or short-circuited, the forward speed is too fast, the load is too heavy, and the blade is reversed, etc. It should be replaced or adjusted accordingly. 2 feeding inlet blocked. The reason is that the crop is too dense or the speed of advance is too fast, and the way to troubleshoot is to reduce the number of jobs or reduce the speed of operations. 3 The machine vibrates strongly. The cause may be that the blade is detached, the tightening bolt is loose, the direction of the yoke fork is wrong, and the bearing is damaged. It should be excluded based on the inspection result. 4 The drive belt is heavily worn. The reason is improper belt tension, different length, heavy load or blade hitting soil, etc., should be adjusted according to actual inspection conditions.

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