Do-It-Yourself Story

I knew that the problem was one of the drum support rollers. At first, I tried taking it off, cleaning and lubing the roller bushing and the axle on which it turns, and put it back together. That fixed it for about 3 days, and it started squeaking worse than ever. Took it apart again, and it was obvious that the shaft and bushing were worn out. There's no fixing them. When they start squeaking, they're done. Bought a new axle and roller, installed them, and it's quiet again.