The oil sight glass in the bearing housing is full, so why does the oil reservoir get empty after some time?
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This post was last edited by mydog513 on 2018-10-15 at 22:43. The oil sight glass in the bearing housing of the cantilever centrifugal pump is full – why does the oil reservoir run out of oil after some time? Is it a problem with the pump design, or does the oil cup need to be adjusted? How to adjust
The cross plate that supports the oil cup below is aligned with the center of the oil sight window
This post was last edited by 3983596_FPPZ on 2018-10-16 09:21. Since the oil level indicator shows that the tank is full, there are two possible reasons for this: 1. Design and manufacturing issues: The height of the threaded hole in the oil reservoir is too high, causing the reservoir to mistake the normal oil level for a low level, which in turn triggers it to add more oil and raise the level. 2. Issues with the oil cup or its quality: The oil cup leaks air, and problems with the quality of the oil cup or its installation can result in a poor seal between the oil cup and its holder, allowing air to enter the oil cup. This prompts the oil cup to carry out a refilling action, thereby raising the oil level. Once the reason is identified, it becomes clear how to make adjustments
After replacing the oil cup, it no longer fits properly; the height difference between the oil cup and the oil sight window has increased.
Check whether the two shims inside the oil cup base are tilted
As can be seen in the image, the lubricating oil has risen above the highest point of the oil sight glass; this is likely a design issue
The oil cup body is leaking, or the seal between the oil cup glass and its base is poor, or the cross-piece under the beveled edge is installed too high!
Regarding the previous diagram, let’s discuss the working principle of the constant-level oil cup on the bearing housing