1、机器工作时超过了额定工作压力，机器负载严重因而产生热。400吨液压机过载的运行也是出现这种情况的诱因之一，尤其是在炎热的夏季，本来工作环境就很热，如果液压机散热做的不好的话，液压机内部的热量就会越来越多，造成越来越严重的后果。
2, poor quality hydraulic oil medium may become thin, so that impurities are suspended, or have affinity with water, which will also cause heat. 400t hydraulic machine in the choice of oil, if the use of low quality oil, long-term use may cause dilution, and impurities in it may also float out, or it may be closer to water, resulting in more and more heat.
 导致400t油压机油管发热的原因有哪些？
3. Check for leakage. There may be oil in the place of leakage, because the oil will absorb the dirt. In addition, overheating often implies leakage, and the joints found to have leakage should be tightened at any time. Listen for abnormal noise, hydraulic pump has; Click; Sound suggests that air may enter the air and produce cavitation, or has been worn by dirt.
4. Improper adjustment of the oil return valve, or failure to replace damaged hydraulic parts in time, sometimes heat will be generated. If there is a problem with the oil return valve of the 400 ton hydraulic press and it is not properly adjusted, the parts of the hydraulic press are not replaced as soon as possible, and heat accumulation will occur.