On opening the front of the dryer, I have discovered that the idler pulley wheel is squealing. When I pull it toward the front, it stops squealing for perhaps 30 seconds (during which period the dryer sounds normal), then resumes squealing.

Is there a lubricant I can use? Or is this a bearing issue?

If I need to replace the wheel or the whole idler pulley wheel assembly, I would appreciate detailed instructions.

Thank you.