The loca|N320Gear oil used in gearbox of Coal Mill, the Gears appeared pitting and scuffing, meanwhile shocking and noise increased, the oil oxidized and sludge formed.

• 磨煤机齿轮箱使用N320齿轮油,造成齿轮点蚀，齿面严重磨损，振动及噪音增大，油质氧化，产生油泥。