Brianna F Fort Deposit , AL December 17, 2022 Appliance: LG Washer WM3001HPA Lg Washer Wm3001hpa: The washer making loud grinding noise. How to replace Rotor Assembly. We removed the back panel, took out the old rotor, and put the new Rotor Assembly in. It took longer to move the washer to access the back than to replace the part. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes