| Fault phenomenon | 原因分析 | 排除方法 | 
| 1. The motor does not turn | ①Hydraulic pump not started or direction incorrect | ①Start the hydraulic pump or correct the pump's rotation direction | 
| ②油箱储油量不足 | ②Add to the specified oil amount | |
| ③The directional valve is in the neutral position | ③Switching Directional Valve | |
| ④Overflow valve pressure setting is too low | ④System pressure adjusted to the specified value | |
| ⑤Motor output torque insufficient | ⑤Replace motor | |
| 2. Hałas podczas pracy jest zbyt głośny | ①There is air in the hydraulic system | ①Find the cause of air intake and eliminate air in the oil | 
| ②吸空 | ②Increase fuel supply | |
| ③Failure of internal components such as bearings in the motor | ③Replace bearings and other damaged parts | |
| 3.内、外泄漏过大 | ①Sealing element damage causes internal and external leakage | ①Replace seal | 
| ②Motor parts have air holes, sand holes, cracks, etc. | ②Replace parts | |
| ③Loose bolts | ③Fasten the bolts | |
| 4. Abnormal fever | ①Hydraulic oil temperature is too high | ①Increase cooling capacity | 
| ②Motor efficiency reduction | ②Replace consumable parts | |
| ③Non-normal wear | ③Replace motor |