1) You should be using oil, not grease. If you use grease you might as well leave it dry because it will never get to the bearing.
2) The Super C (and earlier models) could have either of 2 brands of fan, Service Products or Schwitzer-Cummins. The 200 and later were all Schwitzer-Cummins. I assume you are not mixing parts between the 2 brands. Same precaution applies when looking at differences in the fan shape or pitch, it could be the difference beween brands.
3) The Super C and 200 both had the C-123 engine with a water pump so all the conjecture about different fan requirements for water pump or not are irrelevent to the original question.
4) The useful Parts Catalog for this case is for the Farmall C, as the water pump was an option. It shows both the Service Products and Schwitzer-Cummins fan assemblies. In the case of the Schwitzer-Cummins, they show 2 part numbers for the fan itself:
70212D with no water pump
70214D with water pump
Since the same Service Products fan was used with or without a water pump, it doesn't look like any reengineering of fan capacity was done when a water pump was added. The second fan for the Schwitzer-Cummins was probably just due to interference with the pump assembly itself.
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