Douglas S Edwall , WA December 11, 2014 Appliance: Maytag Washer MTW5870TW0 Maytag Washer Mtw5870tw0: The knob center plastic was cracking in the center where it mounts to the timer stem. How to replace Timer Knob Assembly (Single). By removing the center chrome piece with a blade or screwdriver and pulling the knob up/out position, then push the small center of the timer stem inward, the knob is released. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes