What Causes High Transmission Oil Temperature in Loaders?
3 Answers
High transmission oil temperature in loaders may be caused by insufficient transmission oil, blocked oil passages after the transmission oil cooler, clogged suction filter screen of the transmission hydraulic pump, poor radiator cooling capacity, severe machine overload operation, serious wear or damage of the transmission hydraulic pump, severe system leakage, etc. The relevant introduction of loaders is as follows: Introduction 1: Loaders, also known as shovels, are earth-moving machinery widely used in construction projects such as highways, railways, construction, hydropower, ports, and mines. They are mainly used for shoveling and loading loose materials such as soil, sand, gravel, lime, and coal, and can also perform light digging operations on ores and hard soil. Introduction 2: By equipping different auxiliary working devices, they can also perform tasks such as bulldozing, lifting, and handling other materials like timber. In road construction, especially in high-grade highway projects, loaders are used for filling and excavation in subgrade engineering, as well as for aggregate collection and loading in asphalt mixture and cement concrete mixing yards. Additionally, they can be used for pushing soil, leveling the ground, and towing other machinery. Introduction 3: Due to their advantages such as fast operation speed, high efficiency, good mobility, and easy operation, loaders have become one of the main types of machinery in earthwork construction for engineering projects.
I used to operate a forklift and encountered high transmission oil temperature issues several times. The most common cause is insufficient oil—prolonged operation can lead to oil leakage or burning, causing the temperature to rise. Additionally, a malfunctioning cooling system is dangerous, such as when the fan stops working or the radiator gets clogged with dust, preventing heat dissipation and naturally leading to temperature increases. Overloading is another issue—don’t let the forklift run under excessive load for too long. Once, I forgot to take a break, and the oil temperature warning light came on, scaring me into stopping immediately to check. High temperatures can thin the oil, reducing lubrication effectiveness and accelerating internal component wear, even burning out the transmission in severe cases. My advice is to develop daily habits: quickly check the oil level before each startup to ensure it’s within the marked range; regularly clean the cooling fins; and take a 10-minute cooling break after every hour of operation. This can prevent major issues, saving money and giving peace of mind.
The root cause of high transmission fluid temperature often lies in poor cooling or internal malfunctions. From a maintenance perspective, first check if the fluid level is adequate – if too low, refill with new fluid. Cooling system issues such as failed fan motors, dirty or clogged radiators are common triggers; loose belts also reduce cooling efficiency. Aged fluid contributes to high temperatures as old oil loses viscosity, increasing friction-generated heat. Internal problems like clutch wear or bearing damage are more troublesome, adding extra load. Don't attempt random fixes during diagnosis; use thermometers or professional tools to monitor temperature changes. Upon detecting abnormalities, promptly consult a technician to prevent minor issues from escalating into transmission failure. For prevention, change fluid annually and maintain clear, functional cooling zones. Simple maintenance can significantly extend equipment lifespan.
