ApplianceJunk.com
Forum Index => Dryer Repair => Topic started by: Thorning on November 03, 2020, 03:35:57 PM
-
I am currently involved with repair of this older unit. It is probably at least 25 years old and runs well considering its age. The drum has a slight bump when it rotates which I am sure is due to a weld joint where the drum is rolled and welded during the mfg process. I have asked the factory for a spec on the overall variation they allow on the drum diameter. This is commonly referred to as TIR (total indicator reading). They did not have a number and I dont know if it would mean much since I dont have a setup to measure it anyhow. My question to other techs is when you get a drum that has slight bump during rotation what if anyting do you do about it ? This is not the 1st time I have seen it in dryer drums that are made of thin sheet metal.
-
Today I worked on a couple of Maytag dryers of an older vintage with model numbers LDG512 and LDG7400AAL. The drums were checked when i removed them and it looks like these drums were made of slightly heavier metal than the previous model I mentioned. With this material it appears that the factory was able to make the drum more concentric and the weld seam less likely to have a bump at the weld seam. The newer units are more likely to have the bump problem as compared to the older designs.
-
As of this date, the factory does not have a spec they can provide for the T.I.R. (total indicator reading) and suggest that if a drum has a significant bump to it when passing over the support rollers it should be replaced.
-
If the drum is symmetrical, maybe rotate and reinstall to see if it runs smoother. Front sliders have a wider contact area than the rear rollers and may tolerate the drum's bump.
-
I have on occasion reversed the drum and it sometimes improves the bump. If i is really pronounced I have also considered using a filler material to reduce the bump but not sure if the material would stay in place due to flexing of the drum and heat.
