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 Laundry Center Timer Knob Assembly. 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