High transmission oil temperature is a common fault in wheel loaders during long working hours, especially in summer or under heavy load. If not handled properly, it will accelerate the aging of oil seals, cause wear of internal components, and even lead to serious transmission damage.
The most common cause is poor heat dissipation. The radiator surface is easily blocked by sand, dust, and debris, resulting in reduced air flow and poor heat exchange. Therefore, the radiator and oil cooler should be cleaned regularly with compressed air to keep the surface unobstructed. Avoid washing with high-pressure water directly to prevent damage to the cooling fins.
Another common reason is insufficient or deteriorated transmission oil. Too little oil will lead to poor lubrication and increased friction heat; deteriorated oil will lose its anti-wear and cooling properties. It is necessary to check the oil level every day and replace the transmission oil and filter element according to the specified operating hours.
In addition, overloading operation, long-term low-speed high-load driving, and slipping of the torque converter will also cause the oil temperature to rise. Operators should avoid bad habits such as violent operation and long-term idling. When the oil temperature is abnormally high, the machine should be stopped in time to cool down and check for faults to avoid greater losses.
