The image below shows the lower sliding bearing of the pump; there are two small holes in the oil collection groove on the left side.

This post was last edited by CHANGBAISHI on 2020-9-17 07:13: oil filling hole. This oil injection hole is positioned on one side according to the rotation direction of the shaft, to inject oil into the \"oil sac\". It is the part that is below the surface of the bearing shell. The rotating shaft brings lubricating oil between the bearing shells and the shaft, creating an oil film for lubrication. This portion of oil serves two additional functions: it removes the heat generated by the interaction between the shaft and the bearing shells, as well as any mechanical impurities that may be present. The oil that has completed its task in this area overflows along both sides of the bearing shells and flows into the bearing housing, from where it goes to the main return pipe; there it is driven by the oil pump, cooled and filtered, before being sent to various lubrication points, thus completing the cycle. The texture of this tile surface is quite rough, isn’t it?:)

Oiled, to enable the lubricant to function more effectively

Upon further verification, this hole is a through-hole

My grass? ? Our experienced teachers used to tell us that this is used for oil drainage; when the shaft rotates to the right, the port is on the left, and when the shaft rotates to the left, the port is on the right. Isn’t oil injection done by using the oil slinger?