How do you remove the 81-244 Pella roller from the door?

The 81-244 roller can be tricky to remove, but hopefully we can help. To start, I recommend reading this guide as a primer on what steps are necessary. I'll also relate them here for your convenience. 

Removing the old roller

1. Remove the vent panel and set it in a secure position to prevent damage to the panel.
2. Remove the plastic caps from the adjusting holes located at the bottom of the vent panel.
3. Using a #2 x 8" long phillips head screwdriver, turn the roller adjustment screw clockwise until the screw head clears the adjusting hole.
4. Procedure A Lock a long-nosed Vise-Grip® on the pin which connects the inner and outer housing. Hook the Vise-Grip® with a claw hammer and pry with the hammer as though pulling a nail (see image A).
5. Procedure B Lock a standard Vise-Grip® on the roller axle. Hook the Vise-Grip® with the hammer claw and pry with the hammer as though you were pulling a nail (see image B).

Installing the new roller

1. Insert a new roller and housing by driving the housing into the bottom rail with a hammer (on the housing, not the roller!). Take care not to damage the roller or axle.
2. Reinstall the vent panel.
3. Test operation and adjust the roller height accordingly.