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Why Do Forklifts Break Down More Often in Summer?

May 29, 2026

This year, many parts of the world have experienced persistent high temperatures, with some regions even entering the heatwave season earlier than usual. In warehouses, logistics facilities, ports, and factories, not only do workers have to endure the scorching sun, but forklifts, which operate daily, are also experiencing frequent breakdowns. Many industry professionals have likely noticed a significant increase in forklift failure rates and equipment stability during the summer, largely due to the high temperatures.

 

The engine and cooling system of internal combustion forklifts are the first components to succumb to the summer heat. The vehicle itself generates a large amount of heat during operation, and with exposure to direct sunlight and frequent heavy-load handling, especially in poorly ventilated working environments, the cooling burden increases. Timely replenishment of coolant is crucial; otherwise, insufficient coolant can easily cause the engine to overheat and shut down. Simultaneously, hydraulic oil thins as it heats up, reducing lubrication and transmission efficiency, leading to sluggish lifting, unstable steering, and abnormal noises. These problems are more pronounced during heavy-load, high-frequency operations.

 

In recent years, electric and lithium-ion battery forklifts have become increasingly popular, but batteries are also susceptible to heat. Improper charging and discharging can cause continuous heat buildup inside the battery. If vehicles are exposed to direct sunlight for extended periods or if charging areas have poor ventilation, their range will be affected, battery aging will accelerate, and their lifespan will be shortened. Therefore, proper battery cooling and ventilation are crucial in summer.

 

Many people easily overlook the fact that high summer temperatures also accelerate tire wear. Whether in logistics parks, ports, or construction sites, hot surfaces keep tires at consistently high temperatures. For large forklifts and off-road forklifts, prolonged heavy-load operation further increases tire pressure, not only accelerating wear but also potentially affecting equipment stability.

 

To ensure forklifts can safely navigate the summer, proper daily maintenance and efficient scheduling are essential. Regularly check the cooling system, clean the radiator, and check the hydraulic oil level. Avoid operating forklifts during the hottest part of the day and avoid continuous operation for extended periods; allow the equipment rest time to maximize your economic benefits.

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