Any identifying marks?
I am not familiar with it, but am fascinated (mechanically) by it.
piece with the ring, is that four pieces?
It looks like a cushioned (shock absorbing) coupling. I don't think removing the ring will allow disassembly in place as it sits. I think the ring secures the bronze
pieces in the assembly before installing on the shaft. And those pieces extend into the aluminum
housing to engage the cushion rubber.
Granted I don't know, but if the four coupling nuts were removed and the whole assembly and shaft slid rearward. Then the assembly may come forward off the shaft intact.
Very curious, and I'm sure someone will come along that knows for sure.