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I had two M49C's but sold the tank off one of them thus I no longer have another pump to look at.. My TM doesn't show enough detail.. The pump is made by Jackson and has differently-designed vanes than the superceded replacement, the latter made for the newer Blackmer-built version ..
The old vanes and new replacements are identical in size and composition, but that's where it ends. The old vanes are solid-faced all the way around.. The new Blackmer's have 2 deep slots completely across one face but are solid on the opposite face except for the two small drilled thru-holes... And a metal plate is on one edge as you can see in pic .. I don't want to do a trial run and have to take this thing apart again.![Er... what? o_O o_O](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I would assume (there's that horrible word!) the solid side should be the "pressure" side ... And the metal plate should be at the bottom of the vane slot... But is there some reason a desk engineer may have wanted the slotted face pushing liquid?? Anyone know for sure ?
![20240409_181707.jpg 20240409_181707.jpg](https://www.steelsoldiers.com/data/attachments/676/676225-696d5c7ec3735c07de742c6c230badc2.jpg)
The old vanes and new replacements are identical in size and composition, but that's where it ends. The old vanes are solid-faced all the way around.. The new Blackmer's have 2 deep slots completely across one face but are solid on the opposite face except for the two small drilled thru-holes... And a metal plate is on one edge as you can see in pic .. I don't want to do a trial run and have to take this thing apart again.
I would assume (there's that horrible word!) the solid side should be the "pressure" side ... And the metal plate should be at the bottom of the vane slot... But is there some reason a desk engineer may have wanted the slotted face pushing liquid?? Anyone know for sure ?
![20240409_181707.jpg 20240409_181707.jpg](https://www.steelsoldiers.com/data/attachments/676/676225-696d5c7ec3735c07de742c6c230badc2.jpg)
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