1. The quality, material, or workmanship of aerial platforms is poor; there are problems with structural design. 2. Improper assembly of high speed, improper mating surfaces, broken gaskets, displacement, or failure to install according to operating specifications. 3. The tightening force of the tightening nut is not uniform, the slide wire is broken or the looseness is loose, and the work is invalid. 4. The seal material wears too long after long-term use, aging deterioration, deformation failure. 5. Too much lubricating oil, too high oil level or wrong oil. 6. Deformation and deformation of the joint surface of the components and the damage of the housing cause the lubricating oil to leak out. 7. After the air plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the box, it often causes oil leakage in the weak sealing area. Â Â Â For more information on aerial vehicles, aerial vehicles price, welcome to inquire! Portable Potato Grinder,Electric Potato Masher,Oxo Potato Masher,Mash Potato Masher Hunan Xinta Machinery Manufacturing Co., Ltd. , https://www.china-agricultural-product.com