Peachtree Casement Windows
It's tough to determine what you need without seeing the full operator, but based on what I can see I believe this to be a match for our 39-013 and 39-014 operators. You'll need to review the design and arm size below to verify.
As for removal, these just screw on and off. If the wood trim is obscuring access to the screws then that will need to be pried off ahead of time.
Yes, there is trim that would have to be removed to reach the screws that attach the window frame and crank. I have not been able to find and directions/YouTube videos or guidance on how to remove the trim and don't want to break it.
Are you aware of any repair/maintenance manual or videos that explain how to remove the trim? Or are there any window repair companies in CO we might reach to for expert assistance?
We have a video that you may find helpful. The operator hardware is totally different compared to what you have, but we do show how to properly pry off a wood trim. You are correct in assuming there's a risk of cracking it, so just keep a steady hand and don't use too much force.