1 It is not advisable to use rotary cultivators for plots with many stones. It is best to use other implements for cultivation. 2 Start and engage the power first, then slowly fall down the implement, and slowly insert the blade of the rotary tiller into the soil. 3 The length of the universal joint square shaft and bushing used shall be matched with the farm implement type. If the length is too long, the transmission part will be damaged during use. If it is too short, the farm implement will emerge when it rises; 4 When the cardan joint is installed, the fork opening should be in the same plane to ensure that the knife shaft rotates evenly. Otherwise, the transmission parts are easily damaged; the lubrication and maintenance are performed on time according to the requirements. The lubrication points should not be left unfilled and filled with grease to prevent drying. Rubbing and early damage. Non-Rebreathing Mask,Non-Breathing Oxygen Mask,High Concentration Oxygen Masks,Disposable Concentration Oxygen Mask Shaoxing Jenston Medical Products Co., Ltd. , https://www.sxjcmed.com