Keeping A MT DE 409 Dryer Running Forever
I would also stock a spare motor, timer, heater, inner plastic door panel, the plastic lint filter housing, the idler pulley and shaft, front bearing slides, and extra drum for when the coating wears off in the front bearing area, rear rollers and shafts, lint filter, if you have all these parts available you should be able to keep this dryer going at least another 20 years.
The last thing you will ever need is an idler tension spring, [ I have never seen one fail in my 40+ years fixing MT dryers ], but I will gladly sell you good used ones at $15 each + shipping, how many do you want.
John L.