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Thread Number: 37658
/ Tag: 50s/60s/70s Vacuum Cleaners
Is this normal for a Model G |
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| Post# 401454 11/26/2018 at 17:33 (1,969 days old) by crazykirbydude (Lexington, KY) | ||
I finally got around to rebuilding my Electrolux Model G. The carbon brushes were mere slivers, so I replaced them with a healthy set. After testing it, I noticed more arcing than usual. The commutator has a groove worn into it, but it didn’t arc like this with the old brushes. Is this normal, or did I just damage my motor?
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| Post# 401455 , Reply# 1 11/26/2018 at 17:35 (1,969 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401458 , Reply# 2 11/26/2018 at 18:08 (1,969 days old) by Rowdy141 (United Kingdom) | ||
I can't see a great level of detail from your photo, but it is usual for new brushes to arc a fair bit, until they're run-in.
There is a processes called dressing(?) which speeds-up that settling-in period by grinding a hollow in the brushes to match the curvature of your particular commutator. The worn groove in you commutator may have been caused by the brush-casings when the brushes wore down to slivers, depending on their design. I would expect your new brushes to wear quickly where they're arcing now, until they match both the commutator curve and groove, then they should settle down. You can gently sand your commutator with very-fine abrasive paper. That will remove dirt, glazing build-up, and smooth out the groove. So long as there's enough 'meat' on it so as not to go through the thin copper entirely. | ||
| Post# 401463 , Reply# 3 11/26/2018 at 18:55 (1,969 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401464 , Reply# 4 11/26/2018 at 19:16 (1,969 days old) by Rowdy141 (United Kingdom) | ||
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| Post# 401509 , Reply# 5 11/27/2018 at 06:40 (1,969 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401517 , Reply# 6 11/27/2018 at 10:27 (1,968 days old) by dysonman1 (the county) | ||
You need a carbon brush seating stone. The excessive arching will ruin the armature if you don't seat the brushes correctly. It only takes about 5 seconds, hold the seating stone so it touches the armature as it's rotating, place it right before one of the brush holders. It will make the new brush concaved to the armature and reduce the arching to 'normal'. Also, remove the brush holders and CLEAN THEM with a small brush. You want all the old carbon dust out of there so the new brushes slide freely back and forth. You can order carbon brush seating stones in a box from the internet. I work on vacuum for a living, and haven't used up all the stones I got ten years ago. Best if you can just get ONE stone from a vacuum shop.
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| Post# 401519 , Reply# 7 11/27/2018 at 10:37 (1,968 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401521 , Reply# 8 11/27/2018 at 10:56 (1,968 days old) by dysonman1 (the county) | ||
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| Post# 401560 , Reply# 10 11/28/2018 at 06:48 (1,968 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401715 , Reply# 11 11/30/2018 at 18:21 (1,965 days old) by Electrolux-Dude (Canyon, TX) | ||
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One way to tell, the larger brush housings are usually red, and model 30 housings are black. | ||
| Post# 401718 , Reply# 12 11/30/2018 at 19:34 (1,965 days old) by crazykirbydude (Lexington, KY) | ||
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| Post# 401864 , Reply# 13 12/3/2018 at 19:03 (1,962 days old) by panasonicvac (Northern Utah) | ||
I'd second with dysonman1
That's the first thing I would usually do. Definitely makes a big difference. This is one box that I've been using for a year now at work. Out of hundreds of vacuums that I've repaired, I've only used this twice.
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