When the bottom roller heat-dissipating bearing is cleaned, the bottom roller heat-dissipating bearing should be removed. Firstly, the appearance of the bottom roller heat-dissipating bearing is recorded, and the residual amount of lubricant in the heat-dissipating bearing of the hearth roller is confirmed. After the lubricant for sampling and inspection, the furnace is cleaned. Bottom roller heat sink bearings. Gasoline or kerosene is usually used as a cleaning agent.