1, it may be that there is not enough hydraulic oil, resulting in insufficient pressure to move.

2. Depending on whether it is in the near control state or the remote control state, the device may not respond after operation due to incorrect state switching.

3. The balance pressure of the balance valve is not well adjusted or the balance valve is damaged.

4. The pin shaft and bearing have no lubrication effect, resulting in excessive friction.

5, bearing or arm shaft friction is too large.

6, the main valve pressure caused by diarrhea.