Lester C Pascagoula , MS September 03, 2018 Appliance: General Electric Dishwasher GLD5900N00WW Ge Dishwasher Gld5900n00ww: Dishwasher was making a clunking noise like something hitting inside when it was running. How to replace Dishwasher Center Wash Arm Assembly. Determined that the mid spray arm was loose and worn where it spins. Removed the spray arm with a 1/4” socket and ratchet also removed the mid hub with the same tool. Installed the new hub then the spray arm and bearing (stainless steel washer). Simple repair and no more noise. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes