There should be a drain plug (bolt) at the bottom of the pump to drain the oil. Undo bolt and drain the oil. Replace bolt and fill pump with new oil. Look for a sightglass on the side of the pump. Fill so the oil level is in the centre of sightglass.
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There should be a drain plug (bolt) at the bottom of the pump to drain the oil. Undo bolt and drain the oil. Replace bolt and fill pump with new oil. Look for a sightglass on the side of the pump. Fill so the oil level is in the centre of sightglass.
need to know what kind of oil?