How do I replace the upper rack? There is a plastic stop device at the end.

If it's like my Maytag there appears to be a plastic bump or catch on the outside edge of the slider. A very hard push on the catch should allow you to get the cap out of the end of the slider.

Not sure of the vintage of your Maytag dishwasher, but this may work for yours.
1. Remove the upper rack by releasing the stop clips on the ends of the rack rail; push the ends of the clips towards center of machine - this may require the help of a small screwdriver.
2. The upper spray arm assembly is mounted to the ceiling of the wash chamber by large (2" diameter) fluted nut that butts right against the ceiling sheet metal. Simply remove that nut by hand, and the whole assembly will come out.
3. Looking into the top of center feed hole, you'll see 4 plastic clip ends holding the 3 pieces together. Use a 1/4# socket or nutdriver to press all 4 clips inward until they come free.
4. The spray arm halves are welded together, so you'll have to clean out any clogs using a pointy tool and some water flushing.
5. Reassembly is the reverse order.
Good luck!
- Mike

When you pull the upper rack forward, the two metal glides on each side move forward. On the end of each glide is a white plastic end cap. If you look through the rack to the inside of each glide, you can see that the upper part of the end cap has a upper tab. I put my thumb on the end cap then press the upper tab forward with my index finger. Then press upward with your thumb and the end cap should slide totally upward and then out of the glide. Once both end caps are removed, the upper rack slides fully out of the washer.

Lower Rack

• Remove all of the dishes from the lower dishwasher rack.
• Pull the lower rack out of the dishwasher so that it rests on the dishwasher door.
• Lift the lower rack up and out of the dishwasher.
• Place the new lower dishwasher rack on the dishwasher door, then push it into the dishwasher.
• Upper Rack
• Remove all of the dishes from the lower dishwasher rack.
• Extend the upper rack as far as it will go.

Remove the two plastic end caps, located on the end of each dishwasher arm. To remove, insert a flat-head screwdriver between the arm and the tab on the outside of the end cap, then lift the tap to remove the end cap.
Pull the upper dishwasher rack straight of out the arms to remove.

Insert the rollers on the bottom of the new upper dishwasher rack into the rack arms, then push the rack completely into the dishwasher.
. Align the end caps with the ends of the arms, then push the end caps into place.

Upper Rack

• Remove all of the dishes from the lower dishwasher rack.
• Extend the upper rack as far as it will go.
• Remove the two plastic end caps, located on the end of each dishwasher arm. To remove, insert a flat-head screwdriver between the arm and the tab on the outside of the end cap, then lift the tap to remove the end cap.
• Pull the upper dishwasher rack straight of out the arms to remove.
• Insert the rollers on the bottom of the new upper dishwasher rack into the rack arms, then push the rack completely into the dishwasher.
• Align the end caps with the ends of the arms, then push the end caps into place.

u should be able to pull out and lift up to remove racks

remove the roller rack plastic end caps this will let you remove the upper rack,then you can replace the whole wash conduit from the bottom sump all the way to the top,also if theres a middle(center arm) this has a horn on it that is to seal when the rack and door are in and closed,but after while the water wears out the plastic o-ring and they leak and you lose water pressure to the top wash arm

On the front end of the rails, there should be plastic or rubber stoppers. Remove these and the rack should roll right off as if youre pulling it out to load it.

at the end of the metal racks are the rack stops
you need to push in the little detent and the clip should slide out while pushing

JP Weld works great on repairing these junky Maytag parts. Note that they don't have a replacement for these upper wheels and a guy is selling expensive stainless steel replacements. The round connector broke off of ours that holds the wheel to the rack. My wife found a plastic button that fit within the space and we glued it with JP Weld epoxy (water and temperature resistant). 10 washes later, still working great! I expect it will "heal" any other plastic parts. NEVER will I buy a Maytag again!

I removed the plastic bearing holder on the under side of the slide. I know it did not fix the problem, but it eliminated the bind that would not allow the rack to slide out completely. Thanks

David