My backpack harvester has been used for 3 years. What accessories do I need to change? Shanghai 50 tractor

Check harvester steps 1 Check all belt tensioners and chain tensioners, clean, oil and maintain bearings. Step 2: Check V-belts and chains. Step 3: Check the telescopic tooth and the telescopic tooth bracket from the cutting table. The key point is to check the gap between the telescopic teeth and the cutting table. Step 4: Check the conveying trough to see if the rake blade has lost the tension of the conveyor belt. Check the drum. This is to focus on the degree of wear of the toothed bar in the past three years. You can also do it yourself and cut the two telescopic teeth one by one, but you should weigh and group them to keep balance. Step 6: Check whether the screen of the screening part is damaged. Step 7: Check the hoist to see if the chain tension and scraper wear are serious. Step 8: Check the lawn mower to see if the fixed disc and rotating disc of the lawn mower are worn. Finally, oil the whole machine for maintenance, especially the bearings in the spiral conveyor of the header and the bearings of the driving wheel and driven wheel of the conveying groove must be carefully maintained. In addition, you'd better explain that your harvester is different from Xiangming Juming or Dafeng Wang. Everything I have used is good.