Rick W Gainesville , GA April 20, 2019 Appliance: Model MDB8989SHZ The tube in the back supplying the wash arms was cracked I got on appliance parts pros website, looked up my model number. Using their diagrams I found my part. Ordered it and replaced it, just like the new one. Read More... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes