Judging the oil level while the reducer is running will result in a significant discrepancy with the actual oil level. It is recommended to measure the oil level and add the appropriate amount of worm gear reducer lubricating oil when the reducer is stopped. Worm gear reducer manufacturers usually provide instructions on specifying the oil level; fill the oil to 2/3 of the oil level window.
Note: Do not add lubricating oil while the worm gear reducer is running. During operation, the internal gears or worm wheel rotate, causing the internal lubricating oil to move as well. Judging the oil level under these conditions may result in a full oil level, a level below 2/3 of the oil level window, or even no lubricating oil at all.