Have RV Questions? Ask an RV Mechanic Online.
Part of your problem may be in using the wrong lubricants. Thetford makes some good ones for the rails and roller and also another one for the wiper seals. Not sure what kind of slide locks you have, but you can but aftermarket units that are easy to install and will keep the room locked into place. American Technology makes some that are not expensive. Hope this proves helpful here. Please get back to me if you need more input from me as all follow ups are included in our fee.
I can't say for sure since I can't see it from here. Usually that would be a problem either with the locks or that the room isn't fully extended or retracted or is out of alignment. That would take some inspection from a tech to diagnose I think.
.As I previously mentioned, this can be due to any number of things. Debris in the way or a room out of alignment or somewhat "tweaked" and it may take a tech looking at it to tell.
You are most welcome! Thank you for bringing your question to us here at Just Answer.