The Appliance Geek: Samsung DMR77 Update - Rack Adjuster ... I'm not sure these part numbers are good in the U.S. but it should be fairly easy to get a cross-reference. Since the tech was familiar with the machine, I asked him if he had heard of other complaints, like poor wash performance. http://appliancegeek.blogspot.com/2011/03/samsung-dmr77-update-rack-adjuster.html