On 15 Aug 2018 16:47:41 GMT, dpb wrote:

Your pdf viewer will have +/- buttons on it somewhere to change
magnification factor...

Yes. Thanks. I know.
(The comment was more about my old octogenarian eyes.)

The "C" suffix indicates the face dimensions; I didn't really look at
the specific chart, there's a note at the top to "Contact your local
Baldor office for "C" Dimensions"; there's a partial listing at the
bottom...

Thanks for finding that better chart with some 56C dimensions:
https://www.grainger.com/tps/motors_nema_motor_dimensional_chart.pdf

NEMA face = 56C
Shaft diameter (U) = 5/8
Shaft long (N-W) = 1-7/8
Rabbet diameter = 4-1/2
Bolt circle diameter = 5-7/8

I have one key question of those who have matched motors and pumps.
Q: Does NONE of that matter if I replace the entire pump?