I need assistance with installing Electrolux EFMG617STT0 dryer roller in rear

My Electrolux Model EFMG617STT0 dryer was purchased on 2017. Recently it began making loud rumbling noise. The blower check out ok. It was the roller pulley. I purchased 5 new rollers but I am having trouble assembling because the old set up if different than the new parts. The new parts do not include washers or nylon clips. It has a dome silver spacer and none of the online videos or tutorials show how to set up the spacer on the bolt to install. The trouble I am having is that the nut when screwed on fits snug against the roller and when the roller spins so does the nut and it unthreads itself. I am needing help troubleshooting how to correctly install the dryer roller using the new OEM parts.

Brand: Electrolux
Model number: EFMG617STT0
Main Symptom: dryer roller installation
What happens & when:

Error Code (if any): none
Parts or tests already tried:
Photos / video link:

Did you order an OEM part (Frigidaire 5304523155 Dryer Drum Roller Assembly | Genuine OEM Part) ? If so the plastic spacer that is dome shaped goes on between the roller and nut, with the wider end towards the nut. The narrower end rides against the bearing of the roller and shouldn’t turn when the roller does

Yes they are OEM parts . My understanding is that the wide part of the spacer sits flush against the rear bulkhead. Then the roller then the nut. I will try what you have recommended

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Just for clarity, are you saying that the threaded side of the bolt goes out towards the back of the dryer?

Because currently I have it going where the thread of the bolt is coming in through the inside

right the bolt should come thru from the rear of the dryer with the threads toward the front of the dryer

OK, I’m following everything that you’re saying, but here’s the problem. There’s not enough room to screw the nut on when the threaded side is facing the front of the dryer.

When I reversed it so that the threaded side was facing the back of the dryer, it worked perfect

This is the threaded side coming out of the rear and it tights perfectly

Ok I reversed it and have the threaded side facing the front and in the photo the thread is short to accommodate the nut

Try rotating the roller.

I tried this and the problem is that the roller and nut come unthread together. It’s just not enough space on the axle

If you thread the bolt thru the roller then put the spacer and insert the threaded end thru the bulkhead doe the nut fit

Ok yes this is what I ended up doing and it worked!! Thank you so very much. There’s just not a lot of online videos that show spacer assembly because my dryer used the old nylon clip’s originally. Most of the YouTube videos still show the nylon assembly. Much much appreciated.