How do I replace Y Axis Motor?

Replacing Y-Axis Motor on a Mercury Laser machine.

Open the passthrough door - 
The two red circled screws hold/lock the motor in place when adjusting the tension - the two blue circled screws also hold the motor in place - Remove all 4 to slide out the motor. 
The green circled item is how you can adjust the tension on the motor/belt. 
Y-Axis Motor Mercury

 Author: Daniel Zavala @ GCC America