A gear oil cleaning system works by circulating contaminated oil through a series of filters and treatment processes. Initially, the oil passes through coarse filters to remove larger particles, followed by fine filters for smaller contaminants. Some systems incorporate centrifugation or vacuum dehydration to separate water and gases. The purified oil is then returned to the machinery’s lubrication system. Continuous or periodic cleaning maintains oil integrity, ensuring optimal lubrication and protection of gear components.