The upper spray arm in our jennair dishwasher fell off Karen N. • Granbury, TX • January 12, 2015 My Repair & Advice I ordered an upper spray arm. The new one wouldn't attach. I discovered I needed a new top wash spinner nut. I ordered it and it arrived the next day. I was able to put it in and attach the arm in about 2 minutes. Was this review helpful to you?