1. Check whether the gear pump is worn.
2. Check whether there is a problem with the hydraulic oil and needs to be replaced.
3. Check whether there is any problem with the oil pipe.
4. Winter use of hydraulic system. In the northern region, the temperature is low in winter and the viscosity of the hydraulic oil increases, which affects the normal operation of the system. In addition to selecting the appropriate hydraulic oil, it should be well preheated before use, and work can only be carried out when the oil temperature is not lower than 20 degrees.