How to Troubleshoot & Replace Whirlpool AP6019626 / WPW10327455 Upper Spray Arm

I simply removed the washer arm - removed the old cap from the top of the arm and snapped the new cap into the new arm spray- The whole repair took less than 5 minutes from the time I opened the dishwasher until I closed it. 

I replaced the upper spray arm and retainer at the top of the dishwasher. 

Replaced spray arms and tube. Found all had debris in them and prohibited water pressure from reaching items. After replacement everything comes out sparkling. Don't understand how the spray arms getting plugged. Almost like waste water is recycled. Turns out to be a very easy project and if needed AppliancePartsPro has information and directions available at your finger tips.! 

1. Ran white vinegar through the wash cycle, twice. Helped a little. 2. Used pointed objects to clean holes in spray arms. 3. Replaced all spray arms with new parts ordered from you. 4. Found manifold for upper tray was broken. Replaced manifold. Seems to be working now. The only thing I cannot figure out is how to change the upper spray arm at the top of the dishwasher. It is supposed to pop out; but when I attempt to remove the old arm, the water line pulls loose. I have left the old one in place for now. Took longer to look up the parts than it did to replace them. 

Replaced the part, took five minutes 

Ordered new sprayer and retainer from Appliance Parts Pros. Website has a helpful video that shows how to replace these parts. 

Very easy repair, pulled the water supply tub away from the tub retainers, installed part with new retainer, reinstalled water supply tub 

Replaced the sprayer and the clip. 

First I replaced the door seals but the water leak persisted. Then I ordered all the spray arms but only replaced the middle and lower arms. This solved the water problem and in taking those two arms apart, I found there to be a good bit of calcium buildup that blocked some of the holes and the angle of the sprays.There were no tools required to replace the arms. The lower seal required removal of many parts, whereas the door seal did not require any tools. I did not replace the upper arm because it requires a pin which was not included with that arm. 

Removed the retainer and popped on the new spray arm. Watched the video on appliance parts pros website.