Diagnosing loud pool pump motor
You might as well figure out how to remove some of the pieces of this setup so you can have that inspection look. If something needs replacing it will have to be taken all apart any way. 

If all the water piping is rigidly attached this will be the opportunity to cut the pipes and install union fittings so a future repair/replace is much easier. Note that if the water piping is all PVC pipe that can normally be cut back and spliced in without a union fitting. 

Electrical conduits are not normally too difficult to free up at the motor end and pull the wire ends out of the junction box on the end of the motor. Make really sure that all power to the motor is shut off. That could be two wires to check if it is a 220VAC motor.