Is it more of a screeching sound? If so, more than likely you have a stretched loading belt. If you have never replaced your loading belt all this time, it's due for a new one. The part you need is VEB1184.
The location of the belt is on left side toward the front of the player and I believe you will probably need to remove the tray to access it. Here is a pic of what is looks like on my CLD-59 (similar chassis)....