How to Know Which Pump/Motor It Is By It’s Shape & Size of the Port End Cover
When looking at your end cover notice the bolt patterns. You will need to measure the overall width of the unit, then its counterparts width to the specs. Measure gear widths and match up the correct housings
Just notice the flange patterns, how splines are on the shafts and the gear widths for certain models.
You can call for more information about what end caps go on certain models.