After moving Z to 250mm above the bed and removing filament, Power Off, Power Cables UNPLUGGED!

Remove printhead, DB15 cable, and control box and set aside.

You will need access to the back of the machine as well as the front. Give yourself enough room to rotate the machine if not work all they way around. Another tip is to place a piece of cardboard on the build surface to use a place to work.

If you have access to compressed air, blow the machine off. Use this time to clean the machine and give yourself good lighting to look over all the components thoroughly.

Using a 8mm open end wrench, loosen the bottom inner wheel eccentric locknut. Back it off a few turns.

Using a 7mm closed end wrench hold the nylock nut on the front of the X/Z bracket and loosen the eccentric wheel shaft with the M2.5 hex.

Fully remove both lower inner wheels. They will not be used.

3 points is superior to 4 in this case.