What are the reasons for the slow lifting of the loader boom?
2 Answers
XG958 loader boom lifting slowly is mainly due to insufficient flow of pressure oil, as the speed of the hydraulic system's actuators depends on the flow rate. Other possible reasons include: severe external leakage of system components and connecting pipelines; deterioration of hydraulic oil; clogging, aging of the suction pipe filter, or air entering the system, causing insufficient hydraulic pump suction; internal leakage of the working pump leading to insufficient oil supply; internal leakage of the hydraulic cylinder; excessive clearance between the spool and valve body of the distribution valve; excessively low pilot pressure; excessively low pressure or poor sealing of the priority unloading valve, resulting in insufficient combined oil flow; low diesel engine speed.
Slow lifting of the forklift arm is commonly related to hydraulic system issues. I often deal with such problems and find that low hydraulic oil levels can cause insufficient pressure, preventing the oil pump from drawing oil effectively. Dirty or degraded oil quality, such as contamination with impurities or water, can obstruct smooth oil flow. Alternatively, a severely clogged filter can hinder oil circulation. Additionally, worn seals in the hydraulic cylinder can lead to internal oil leakage, preventing pressure buildup. Valves may also get stuck or fail, disrupting flow control. Don’t forget to check for oil line leaks—unusual noises or wear in the pump can also affect performance. Regular maintenance is key: change the oil periodically, clean the filter, and prevent dust intrusion. Ignoring slow lifting can accelerate wear and even trigger other failures, so early diagnosis and repair improve efficiency.
