If the pump is fitted with oil drain port, firstly fill oil in the pump case.

有泄油口的泵，要向泵壳体中灌满油。

youdao

This paper designs the compositive valves which components of fill oil valves and lock valves, closed oil tank and device connector.

本文对系统的吸排阀和锁阀组成的集成阀块、密闭油罐及直驱式系统的其它连接部件进行了结构设计。

youdao

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。

youdao

And other countries are ready to fill the gap. We already import about But the oil spill is expected to drive that number higher.

VOA: standard.2010.05.27

Oil exports fill about 70 percent of the government's coffers.

VOA: standard.2010.04.20

Saudi Arabia is stepping up by suggesting it will fill oil shortages sparked by Libyan conflicts.

FORBES: Oil Prices Spike, Saudis To The Rescue?

The caisson would fill with oil from the leak.

ECONOMIST: Fixing oil wells

One cubic mile of oil would fill a pool that was a mile long, a mile wide, and a mile deep.

NEWYORKER: The Climate Fixers