Middle Spray Arm

Replacement of the arms is very simple, the bottom arm pulls out after turning it counter clockwise, no tool needed. The upper arms need the use of a nut driver or simlar tool to remove the hex screws holding them to the water supply tubes. The hardest part of the repair will be removing the top dish tray. This requires twisting the door slide end retainers outward to remove them and then the dish tray will slide out allowing easy removal of the arm. The top arm is mounted the body of unit.
This problem would not have occurred if there was an inline filter on the cold side to filter out calcium (whole house filter). Another way to have corrected this without the purchase of parts would be to run the dishwasher on the rinse cycle 3 or 4 times using 1 cup of lime away on each rinse and also by removing the arms and soaking the arms in a 50/50 solution of water and lime away for 24 hours. This will break down the calicum and enable the arms to be cleaned using a garden hose. New parts however save time and labor in cleaning the arms, however the main drain and supply lines to the arms still need the rinsing prior to replacing the new parts.

My dishwasher was doing a terrible job of cleaning. It was leaving food on dishes, and wasn't dissolving all the detergent. I replaced all the spray arms and the filter, as they seemed clogged, and god knows how old. It's a super easy repair, and the dishwasher now works as if it were brand new.

This was very easy. 1) roll out lower rack, 2) rotate lower arm slightly counter-clockwise and lift it out, 3) install new lower arm by dropping into position and rotating clockwise. 4) roll in lower rack, and roll out upper rack, 5) use a nut driver to remove the retaining bolt/screw from the upper arm - it's in the center of the upper arm and you have to work from underside of upper rack, 6) remover upper arm, 7) install new upper arm by holding in position and re-inserting the retaining bolt/screw. 8) Tighten the retaining screw and make sure upper arm freely rotates.

change the nozzles and filter

I looked at the diagram on the web site, the same one that I ordered from, and figured out how all the parts were suppose to go together. The spray arm has 2 brackets so it was a matter of aligning the tube that feeds the spray arm with the supply line on the back of he dishwasher. I had to move it once to get it properly aligned but found it to be simple.

I watched the video, read the instructions and went to work. This was the easiest repair I have ever done. I'm 71 and if I can do all 3 spray arms in a total of 15 minutes, anyone can. The hardest part was getting up off the floor when I was finished. The spray arms were all clogged, we have very hard water.

Took the old ones off and put the new ones in.

My water has a lot of calcium and the spray arms clog.
Second time in 3 years

Unscrewed the screw holding it in place and removed it, out the new one in place and screwed it on. Very quick and simple.

Ordered and replaced all three spray arms. The upper and middle spray arms were quickly replaced with a net-driver and are now working much better. The lower spray arm required no tool, just turn it CCW and lift it up. After replacement lower spray arm is still not moving at all. Maybe the lower spray arm washer is defective or the pump is just not putting out enough water. Will consider further repairs or replacement of the dish washer, it is 13 years old and used daily.