What to do when a hydraulic motor won't turn? This article will help you solve the problem. Hydraulic motor does not rotate is usually the pressure, hydraulic oil and hydraulic components out of trouble caused.
1. Insufficient pressure in the hydraulic system
Insufficient pressure in the hydraulic system will cause the hydraulic motor to rotate weakly, so the starting torque is small, or even no torque output, the hydraulic motor will not be able to rotate. There are many possible factors leading to insufficient pressure in the hydraulic system, need to analyze specific problems, the following shows the most common reasons:
(1) Hydraulic fluid level and quality. Normal operation of the hydraulic system depends on adequate fluid volume and proper fluid quality. Insufficient or contaminated fluid will directly result in the system's inability to generate sufficient pressure.
(2) Strainers and filters. Clogging of the suction strainer or other filters will impede the flow of hydraulic fluid, resulting in the pump not working properly, which in turn will lead to the problem of insufficient system pressure.
(3) Hydraulic pump and power source. The hydraulic pump is the core of the system, and if the pump is worn or leaking internally, it will not be able to generate sufficient pressure.
(4) External or internal leaks. External leaks are usually easy to spot by inspecting lines and fittings, and oil seepage or leaks are a common cause of insufficient pressure.
2. Insufficient flow in the hydraulic system
Hydraulic system flow is not enough, the hydraulic pump oil supply is not enough and the outlet pressure is too low, resulting in insufficient output power of the hydraulic motor, and thus the output torque is small, the hydraulic motor can not rotate.
Insufficient flow in the hydraulic system is usually due to hydraulic motor failure, system leakage or blockage of the oil circuit. At this time, you should check the hydraulic pump oil supply, find the reasons for insufficient oil supply and eliminate.
3. Incorrect or damaged hydraulic motor installation
Tightening the fastening screws too tightly: tightening the fastening screws too tightly will cause the parts to fit too tightly on the flat surface, which will cause the motor to run poorly or to jam and not rotate. The solution is to tighten the screws within the specified torque range.
Between the output shaft and the shell bite bad: when the output shaft and the shell of the fit between the clearance is too small, will lead to the motor bite dead or crawl, when the hydraulic oil contains impurities will also happen this situation. The only way to deal with the output shaft and shell (or with the oil sleeve) paired with replacement.
It should be noted that the motor should not be disassembled easily, when it is necessary to disassemble the motor for inspection, please pay attention to the following matters:
(1) When disassembling and assembling, make sure the site is clean and do not touch the parts.
(2) Before assembly, use gasoline or kerosene to clean the parts (rubber seals should not be immersed in gasoline), do not use cotton gauze. Do not use cotton gauze, cotton cloth to wipe the parts. Seals should be assembled around the appropriate amount of lubricating grease, to prevent the assembly of scratch seals.
(3) After assembly, add 50ml~100ml clean hydraulic oil to the motor oil port, rotate the output shaft and check whether there is any abnormality.
(4) In order to ensure the correct rotation of the motor, it is necessary to pay attention to the corresponding position of the output shaft and the rotor.
In addition, the hydraulic oil is too dirty and the temperature of the hydraulic oil is too high, which may also cause the hydraulic motor not to rotate.
According to the above reasons, you can check and solve the problem of hydraulic motor does not rotate one by one. It is recommended to start from the hydraulic system pressure, oil quality, leakage, mechanical failure, etc., and gradually investigate and repair.
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