Barbara H, thanks for your reply, particularly the link to the parts schematics.
Expert(s), here are my update and new questions:
I opened the front panel and found the drum belt had snapped. The drum support rollers and idler pulley seemed to be in good shape, and the four (4) triangular rings (on the drum support roller shafts) were all intact. So, I decided to replace only the belt, even though the dryer maintenance kit that I purchased had all of those other parts.
1. Should I have replaced the rollers, idler pulley, and triangular rings anyway as a good preventive maintenance move?
2. I am concerned about the possible movement along the shaft of the right-side drum support roller (facing the dryer, above the motor). Its triangular ring appears to lock-in toward the back of the shaft almost flush with the back wall, which gives the roller about 1-3 inches of possible travel. Is that correct?
In contrast, the left-side drum support roller’s triangular rings appear to lock-in the roller toward the front of the shaft with no more than ¼-½ inch of possible travel. Because I did not remove the triangular rings, I could not tell if this was a design matter, or if the back triangular ring on the right-side roller had moved into a bad place.
Thanks for your help.
P.S. This is my second attempt to post a reply -- the first one did not appear to link, so I am trying again.