Cumberland Pneg-779 - Flex-Flo Motor Product information

Hello, I have analyzed the provided instructions for the Cumberland Flex-Flo Motor. This document provides information about the wiring diagram and the two mounting positions including installation modifications. I am ready to answer your questions about the Flex-Flo Motor.
What does the wiring diagram concern?

What is the required gear lube?

Are vent plugs and hex plugs interchangeable?