I just purchased a shore home and the slider does not work smoothly. Thinking the track and rollers need cleaning or replacing. I have lowered the rollers but lifting the door to swing out the bottom doesn't go high enough into the top track due to the ivory colored piece seen in the photo. There is also one at the bottom. The weather strip appears to also be attached to this piece. Is this piece removeable and how without breaking it. I have not found any labels or markings as to the door manufacturer.
Thank you
John
PS- I have purchased double hung window tensioners from you in the past.