1、 The items that must be checked before homework are very important for the safety, smoothness, and enjoyment of homework. It is necessary to check each item carefully before starting the homework.  
1. Inspection of switch box: Check if the power cord of the non fuse switch is loose, and if it is loose, it must be securely tightened.
2. Confirm and adjust the tension of the chains, mesh conveyor belts, pressure conveyor belts, and belts in each department.
3. Is the gear oil SAE90 # for the continuously variable transmission gearbox excessive or insufficient? If it is excessive, please drain the excess oil from the drain plug, and if it is insufficient, please replenish it from the oil filler.

2、 Adjustment and maintenance of vegetable washing machine: When adjusting, inspecting, or replacing the following parts, the power switch must be turned off first.  
1. Belt adjustment: 1. Implement after the motor stops. At the middle of the two pulleys, use your fingers (middle and index fingers) to compress the belt by a standard value of 7-12mm. When it exceeds the standard value, adjust the idler to the specified tightness.  
2. Chain adjustment: 1. Implement after the motor stops. 2. Press the chain with your fingers (middle and index fingers) in the middle of the two sprockets, with a standard compression of 4-9mm. When exceeding the standard value, adjust the idler to the specified tightness.  
3. Inspection, refueling, and replacement of oil for continuously variable transmission gearboxes: 1. Stop the motor and strictly prohibit smoking. 2. Use Guoguang brand # 90. 3. Remove the oil inspection plug and add an appropriate amount of oil as soon as it flows out. If it is insufficient, replenish it.
4. Long term storage method: 1. Rinse and clean the soil and other substances attached to each part with water, and wipe dry with a cloth. 2. All debris and vegetable leaves attached to the rotating parts, belts, chains, etc. should be completely removed. 3. Each rotating part and friction active part should be fully oiled to prevent rusting. 4. Each chain should be fully oiled to prevent rusting. Minor malfunctions in vacuum packaging machines - Maintenance methods for oil filters - Analysis of common faults in oil filters - Maintenance of double-layer glass reactors - Correct use of plastic crushers - Introduction to causes of overheating in air compressors - Analysis of correct use and maintenance of diesel turbochargers