Nudor Sliding Glass Door

Hello,

We'd like to help but, unfortunately, we do not carry anything like the rollers in your photos. I'm sorry that we won't be able to assist with this repair but please let us know if you have any other hardware questions. 

You say that you believe your patio door is by "Nudor" by the name on the handle. We did carry a roller by Nudor  at one time, but it is now discontinued. There's also no telling whether it's what you have now, especially since ours had a single concave wheel, unlike the part shown earlier in this thread.

The only patio door rollers we carry with "flat" wheels like what's shown in the photos above are the 81-151 and the 81-011, but the design is so different that I cannot verify whether they'll work. I am not optimistic.

These are very old doors and to be perfectly honest I'm not certain how the rollers were meant to be removed. If I were you, I would contact a local professional to come out and do the job for you. It may be quite the project.