Bought a GT outpost on CL and am having a problem with the front derailleur in that it will not drive all the way to the small sprocket. There was no brand on it and it was in bad condition. I bought a similar replacement (Shimano NEXAVE) at the co-op but having the same problem. Not attaching the gear cable, just trying to adjust by using the limit screw. The derailleur is bottom pull and 31.8 diameter.

The bike has an Acera rear derailleur, can I just buy an Acera front derailleur and expect it to fit?
Thank you.