John Gibbons wrote:

In the thread discussing Francois oil pump issues the cavities in both the front housing and the front end of the pump housing have been mentioned. I noticed
these a while back and wondered why they were there. I would think it would be easier and cheaper to produce if the ends of the pump were flat. In mass
production though this might not be an issue. I also thought it would allow leakage, making the pump less efficient. So what is the reason for these cavities
?

Thanks
John

The cavities in the front housing feed oil into the pump and allow it to escape
from the pump. I was unaware there were other cavities in the pump housing itself.

Paul Lamar
 
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