Terry W Dolores , CO September 23, 2016 Wings on coupler had broken off almost 20 yrs old Very difficult to get the old coupler off. After a couple of days of trying to lift it w/ a screwdriver we finally inserted the screwdriver & pounded down on its handle w/ a hammer. I think the vibrations finally shook it loose. After getting it off, replacing w/ a new coupler was easy. Went ahead and replaced the dome & blade assembly to. It's like having a brand new blender! Do-It-Yourself Rating: Repair Time Estimate: 2+ hours