Fill oil into the oil tank, when the hydraulic pump is full of oil fluid, manually turn the coupling, till there is no bubble in the oil outlet.
向油箱灌油，当油液充满液压泵后，用手转动联轴节，直至泵的出油口出油并不见气泡时为止。
If the pump noise at work, this is often due to low oil temperature, oil viscosity is too high, the oil into the air, or pump coupling loss causes such as excessive wear and tear.
假如泵在工作时产生噪音，这往往是因油温太低，油液粘度太高，油液中进入空气，联轴节失中或泵过度磨损等原因引起。
If the pump noise at work, this is often due to low oil temperature, oil viscosity is too high, the oil into the air, or pump coupling loss causes such as excessive wear and tear.
假如泵在工作时产生噪音，这往往是因油温太低，油液粘度太高，油液中进入空气，联轴节失中或泵过度磨损等原因引起。
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