Part that attaches the sprayer arm was broken.

Removed first part of the broken part from the top rack of the dishwasher from below.

Removed the screw from the bottom of the sprayer arm to release the second half of the broken part.

Threaded new part in sprayer arm and replaced screw.

Attached part to top rack of dishwasher from below. This part was difficult. (The part appeared to be a little larger than the original.) It was a two person job, one person pushing down on the rack and the second pushing upwardand inward on the part it click to click it into place. Dishwasher now works great.