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。

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The governing behavior of hydraulic coupling has been expounded, and the causes resulting in unstability of outlet flow rate of the said pump being analysed.

阐述了液力联轴器的调节性能，分析了水泵出水流量不稳定的原因。

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The delivery pipe (1) has a double-layer pipe body (2) which has in each case a coupling collar (7, 8) at the inlet-side pipe end (5) and at the outlet-side pipe end (6).

输送管（1）具有一 个双层的管身（2），该管身在入口侧的管端（5）上并且在出口侧的管 端（6）上分别设置一个联接凸肩（7、8）。

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