The energy storage tank of the hydraulic system is broken. You can only replace the air bag and inflate it. Otherwise, it will take a long time. If you regret it, the resonance of the hydraulic system will cause more trouble.
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An interesting fault
The can is broken, and the pressure is rhythmic. This is the hydraulic part.
On the other hand, the servo motor follows the rhythm of the energy storage tank and goes off and on.
Oil and electricity are irrelevant.
