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。
2
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。
3
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).