one of the rollers was broken away from the rack and when I would pull out the top rack it would sometimes drop downward and the dishes would rattle. I was afraid that it might leave go completely and I would have alot of breakage.

Removed the end tabs from the rack and then removed the rollers one at a time.

Replaced the rollers one at a time , one side at a time, starting with the rear ones. I had to use the pliers to remove one of the rollers ( it was tight) and to dislodge the end cap brackets on the rack.

Replaced the remaining 3 rollers.

Placed the end cap brackets back on the rack and then slid the rack into place.

It works great now!