Screen door roller

I have a Pella patio door and I need help finding a replacement roller. Thank you!

I have the same issue. By chance do you know the part number of the discontinued part.

I had to contact Pella and they put me in contact with a Pella dealer near me. It cost about $45 for the part and $40 shipping.

I have had a Pella sliding screen door for over 30 years and had to replace this trolley assembly about 15 years ago. When the plastic screw holders on the assembly broke this time, I figured that replacing it would be difficult. This time, I made repair pieces myself. It took about 2 hours to make the repair, and cost under $10.00. 

First, I went to a metal supply store and bought a 1 foot piece of aluminum bar stock. The bar is 1/2" high and 3/8" thick. I also bought a 1 foot piece of solid aluminum rod, 1/4" in diameter. I drilled a 1/4" hole through the 1/2" side of the bar about 1" from the end. I cut a 7/8" piece off of the rod. I pushed that 7/8" piece through the 1/4" hole I drilled. That piece is now the new axle for the wheels. 

To remove and reuse the plastic wheels, I had to grind down the plastic tabs that held the wheels on the old assembly. I also had to grind down the inside hub on the wheel, so that the new assembly was not too wide for the track. You don't have to worry about capturing the wheels on the axle, because the sides of the track itself stop the wheels from coming off the axle. 

Next, I drilled a 13/64" inch hole through the bar on the 3/8" side, 1/4" from the axle. I tapped that hole with a 1/4"X20 thread tap. Then cut the axle assemblies off of the rod, so each of the two assemblies is 1" long. Put the wheels on the axles and slide both assemblies into the track and reinstall the track in the door opening, after you remove the old return spring. 

Before reinstalling the door, use a drill to enlarge the holes that the old screws went through, so you can get a 1/4"X 20 thread X 3" long screw through the top of the door. Then line up the new axles with the holes in the door, and screw the 1/4"X20 thread X 3" long screw into the new axle assemblies. 

The door slides great. The only downside is the door no longer automatically closes. The good thing is the cost was under $10.00, compared to the nearly $150.00 cost to replace the trolley last time. I can close the screen door myself. Sorry, I did not think to take photos during the build process, only of the materials.