Thread Number: 39836
/ Tag: 50s/60s/70s Vacuum Cleaners
Hoover Convertible Brush Seating Stone |
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Post# 422893   4/6/2020 at 19:23 (1,452 days old) by hooverU4089 (CT)   |   | |
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This is a follow-up from an earlier thread. Has anyone had success using a brush seating stone on a Hoover Convertible motor? |
Post# 422895 , Reply# 1   4/6/2020 at 19:40 (1,452 days old) by Lesinutah (Utah)   |   | |
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You mean using a commuter stone to help seat the carbon brushes.
I'll let you in on a secret on what I do. I completely remove the armature. I get a drill with an open chuck. I put armature in the drill. I tighten the armature so it rotates as if it was in the vacuum. I use the commuter stone I then make sure there is no excess dust from the stone. I then rotate it and make sure the armature blades are all straight. I've done a Hoover 913 motor but not a convertible. I've done this on lamb motors from late 20's and newer. No I haven't but you now know how I do it and a vacuum shop owner who owns a chain of 4 stores does it. Les |
Post# 422898 , Reply# 2   4/6/2020 at 19:51 (1,452 days old) by vacuumlad1650 (Wauponsee, IL)   |   | |
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Post# 422899 , Reply# 3   4/6/2020 at 20:01 (1,452 days old) by bnsd60m9200 (Akron OH)   |   | |
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Post# 422908 , Reply# 4   4/6/2020 at 21:34 (1,452 days old) by MadMan (Chicago, IL, USA)   |   | |
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I use Les' method but with sandpaper, the grit depends on how torn up the commutator is. If it's in good shape, a scotch brite pad is plenty. If it's really torn up, I suppose a stone might be better, or a flat block wrapped in the sandpaper. The flat block will keep the surface of the commutator flat. If you have new brushes or brushes that are worn wrong, I would wrap the commutator in sandpaper (maybe 150 grit), with the sand facing out. Then use it to sand its curved shape into the brushes. Just hold the brushes at 90 degrees. They need not be perfect, they will wear in as the motor is used.
This is kind of the lazy man's method but it works. |
Post# 422967 , Reply# 7   4/7/2020 at 22:20 (1,451 days old) by Lesinutah (Utah)   |   | |
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Post# 422968 , Reply# 8   4/7/2020 at 22:22 (1,451 days old) by MadMan (Chicago, IL, USA)   |   | |
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Try my advice to shape the brushes. Technically, you don't need to take the motor apart. Stick a slice of sandpaper (~150 grit) between the commutator and the brush, sand facing the brush. Get something to push the brush into the sandpaper (the springs are likely not strong enough), and slide the paper back and forth over the commutator, to shape the brush to its curvature. Also ensure that the spaces between the commutator's contacts are clean, assuming there is space between them - some are filled with epoxy or whatever.
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Post# 422973 , Reply# 9   4/7/2020 at 22:38 (1,451 days old) by bnsd60m9200 (Akron OH)   |   | |
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les, a convertible motor CANT be seated like that. the motors arent designed that way.
U4089, run the machine with the belt ON for 10-20 mins on the highest height setting NOT on carpet. that is what is recommended by people i know who repair these machines for a living. hoover didnt think through very well about seating carbons in thier uprights. there really is no way to seat them aside from a long duration static load test to get the carbons to seat on thier own |
Post# 423025 , Reply# 11   4/8/2020 at 19:10 (1,450 days old) by vacman1961 (North Babylon, New York)   |   | |
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It definitely works, I have been in the vacuum business for over 40 years, we have saved many convertible motors. |
Post# 423028 , Reply# 12   4/8/2020 at 19:55 (1,450 days old) by Lesinutah (Utah)   |   | |
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It a thread on how to seat carbon brushes.
The motor can be done where the fan goes put the armature on drill. I only mention because when turned on RPMs are high and I don't like the zap a carbon brush inflicts. It hurts like a mother. Don't ask it hurts. If you need a bearing replaced on bottom of the armature fix the bearing before doing anything. The bearing could cause armature to not rotate in perfect motion. The bearing could be the reason nothing is working. Les |
Post# 423356 , Reply# 14   4/13/2020 at 12:14 (1,445 days old) by hooverU4089 (CT)   |   | |
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Listen to the motor of this Convertible in the video. Notice the sort of raspy sound it has. My machine sounds somewhat like this, but worse. CLICK HERE TO GO TO hooverU4089's LINK |
Post# 423362 , Reply# 15   4/13/2020 at 14:06 (1,445 days old) by vacuumlad1650 (Wauponsee, IL)   |   | |
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Post# 423364 , Reply# 16   4/13/2020 at 14:33 (1,445 days old) by vacuumlad1650 (Wauponsee, IL)   |   | |
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Post# 423397 , Reply# 18   4/13/2020 at 19:30 (1,445 days old) by MadMan (Chicago, IL, USA)   |   | |
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Nice work! I believe it takes a normal small appliance / vacuum / sewing machine light bulb. 2 contact bayonet base bulb? Pretty sure any old thing will work. Look on ebay or amazon for either 'vacuum light bulb led' or 'sewing machine light bulb led.' Just ensure the base looks the same as yours, and that they say 120v not like 12v.
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Post# 423407 , Reply# 19   4/13/2020 at 20:23 (1,445 days old) by vacuumlad1650 (Wauponsee, IL)   |   | |
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Post# 423410 , Reply# 20   4/13/2020 at 20:29 (1,445 days old) by Lesinutah (Utah)   |   | |
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Post# 423458 , Reply# 22   4/14/2020 at 08:40 (1,444 days old) by Lesinutah (Utah)   |   | |
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I'm pretty sure is the exact bulb I ordered March 1st. I'll post a link but it's likely the one you are looking at. This bulb is the highest build quality I've seen.
It's the daylight 6000k color. Les CLICK HERE TO GO TO Lesinutah's LINK |
Post# 423481 , Reply# 23   4/14/2020 at 14:37 (1,444 days old) by MadMan (Chicago, IL, USA)   |   | |
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Not sure about the 15w vs 25w. I don't think this would really translate to LED bulbs. However, the only thing I can fathom is that the 15W bulbs have a more delicate filament, and your machine vibrates it to death. I *think* that lower wattage bulbs have longer filaments (= more resistance = lower wattage), so they probably have a longer length of filament between each support, so more there to bounce around when vibrated. It's just a hypothesis, though, and it probably depends on the engineering of that particular bulb.
That being said, however, if bulbs have been vibrated to death, LED bulbs may suffer a similar fate. Depends on the particular engineering, of course. Then again, that might've been the bad bearing, right? Maybe it's not even a concern now. |
Post# 423488 , Reply# 24   4/14/2020 at 14:54 (1,444 days old) by Lesinutah (Utah)   |   | |
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In my Hoover 913 it uses this bulb. The only issues I have had with LED are 3 watt bulbs. My 913 is older than the convertible. It's a rolling 35lb Sherman tank with the old beater bar. It thumps pretty good and the bulb hasn't had issues.
It's more than I like to pay for bulbs but the quality is very good. Les |
Post# 423547 , Reply# 25   4/15/2020 at 08:15 (1,443 days old) by hooverU4089 (CT)   |   | |
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@Lesinutah: Does that manufacturer make that bulb in warm white? I saw the 3000K warm white option (v.s. 6000K daylight), but I am not sure if the electrical specs are any different. |
Post# 423585 , Reply# 26   4/15/2020 at 19:41 (1,443 days old) by Lesinutah (Utah)   |   | |
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They only have daylight at 6k. The daylight usually is 6k. The 3k light is similar in color as regular stock bulb.
I think the daylight takes more energy to make. I assume 6k is the preferred color when I put headlights 6k seems to be the power it takes to get the color of light. I don't know if I'd go for 3k lower wattage. I'm going to guess the fixture highest output would be 12 watts. I know 120 volts is a term people use but I've gauged bulbs via watts. I think closer to 5 watts which would be less than half of the watts used the lights won't function correctly. They are either too much power or intermittent power where they flicker but never truly work. Les |
Post# 423590 , Reply# 27   4/15/2020 at 22:12 (1,443 days old) by MadMan (Chicago, IL, USA)   |   | |
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Post# 423595 , Reply# 28   4/15/2020 at 22:49 (1,443 days old) by Lesinutah (Utah)   |   | |
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Post# 423600 , Reply# 29   4/16/2020 at 01:33 (1,443 days old) by MadMan (Chicago, IL, USA)   |   | |
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Les - 6000k is the color temperature. 6000k is blueish white / cold white, 3000k is yellow / warm white. It kind of sucks because very few LEDs are available in 4000k, which is actually WHITE white, not yellow or blue. Lumens is the amount of light output. And then there's CRI or Color Rendering Index, which is how true the light is to pure sunlight, which includes even amounts of every color of the rainbow, including in-betweens. LEDs have all the colors, but not the in-betweens, they may look white, but are not actually.
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