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galexander
Samba Member
Joined: April 17, 2003
Posts: 637
Location: Round Rock, TX
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 Posted: Mon Oct 13, 2008 9:32 pm Post subject: Smoke from Wiper Motor |
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Question of the night, I am working on the wiper motor on my '63 SC. I have it out and the motor on my work bench. It is a 6 volt, but I hook it up to 12 volt, knowing it will spin fast. Well, the problem is it smokes very badly amd sparks a lot around the brushes.
I think at first it's the power wire possibly shorting, but that is not it. I then take it all apart, clean re-grease, still smokes, and is very noisy.
One thing, it sort of hangs up, the armature, doesn't spin freely, almost like the brass bushing or shaft is out of alignment.
Any ideas or help would be greatly appreciated.
Thanks
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sub-hatchtim
Samba Member
Joined: September 19, 2006
Posts: 2687
Location: Phoenix AZ
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| Posted: Mon Oct 13, 2008 9:53 pm Post subject: |
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| either have the armature turned or get a new one |
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twinwindows
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Joined: December 08, 2000
Posts: 4086
Location: So.Cal. Highland Park GFK!
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| Posted: Mon Oct 13, 2008 9:57 pm Post subject: |
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You can swap the armature from a 12Volt motor and slip it right in or a put voltage drop.
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EverettB 
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Joined: April 11, 2000
Posts: 71812
Location: Phoenix 602
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| Posted: Mon Oct 13, 2008 10:28 pm Post subject: |
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I don't have a ton of advice but my '63 motor smoked because everything was super dirty. I cleaned it all up and cleaned out the grooves on the armature with a little dental pick and it runs smooth and cool now. I'm on 6v.
Since the motors are pretty easy to find, I would consider just finding another one.
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Last edited by EverettB on Tue Oct 14, 2008 8:52 am; edited 1 time in total |
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LittleThunder
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Joined: May 21, 2006
Posts: 1015
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| Posted: Tue Oct 14, 2008 4:44 am Post subject: |
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| The clearance in electric motors is pretty tight, I've had them scrape a bit when they were just a little rusty. Just cleaning up the outside surface of the armature with sandpaper and also the inside surface of the magnets usually helps out. The sparking will be from the brushes jumping a little over the uneven commutator. Clean the grooves like Ev says and I also polish it a little with 400 grit paper. Just enough to make it shine. Hope this helps. |
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mynameismud
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Joined: October 23, 2002
Posts: 5937
Location: Middle of a corn field
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| Posted: Tue Oct 14, 2008 11:57 am Post subject: |
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| twinwindows wrote: |
| You can swap the armature from a 12Volt motor and slip it right in or a put voltage drop. |
I dropped a 12V armature in from WW, and my motor wouldn't work- dropped the 6V back in and worked..  
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Clara
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Joined: June 14, 2003
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| Posted: Tue Oct 14, 2008 1:56 pm Post subject: |
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Major Woody
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Joined: December 04, 2002
Posts: 9016
Location: Portland, OR
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| Posted: Tue Oct 14, 2008 2:53 pm Post subject: |
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I like the photo essay.
It seems like all the grease in these ends up in that hardened state. I replaced mine with white lithium and it is very quiet.
When I first fired it up, it released a little smoke and then calmed down, cooled down and stopped stinking. It's fine now and works as well as a VW wiper motor can. |
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62Baido
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Joined: January 18, 2007
Posts: 140
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| Posted: Mon Nov 10, 2008 11:57 am Post subject: |
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I did my rebuild this past weekend and got it working as nice as a 6v wiper can. 
Now gonna look into the variable speed resistor.
I have a 3 motors and used the least yucky one to rebuild.
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62Baido
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Joined: January 18, 2007
Posts: 140
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| Posted: Mon Nov 10, 2008 12:04 pm Post subject: Re: Smoke from Wiper Motor |
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| galexander wrote: |
One thing, it sort of hangs up, the armature, doesn't spin freely, almost like the brass bushing or shaft is out of alignment.
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This is your problem. Loosen the 4 long screws that hold the motor to the casing. You should be able to move it just enough so that the armature spins freely. I had to use one hand to hold the unit in place while carefully tightening with the other hand. Once it is spinning freely it shouldn't spark at ya anymore.
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Ollie W
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Joined: May 20, 2004
Posts: 854
Location: Portland, OR
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| Posted: Mon Nov 10, 2008 12:22 pm Post subject: |
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I'm going to hijack this topic a bit, but I'm about to clean up my wiper motor too. I was thinking that I would change the switch to use one of my extra headlight switches and wire it to the dimmer part so I could vary the speed. Will that work?
Chris |
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EverettB
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Joined: April 11, 2000
Posts: 71812
Location: Phoenix 602
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Spezialist
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Joined: July 01, 2005
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| Posted: Mon Nov 10, 2008 2:05 pm Post subject: |
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| EverettB wrote: |
| I don't know the answer to that but the first thought that pops into my head is whether the variable resistor can handle the amperage pulled through it by the wiper motor. |
I've got a dial on the sc I just picked up, I can turn it up!
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Ollie W
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Joined: May 20, 2004
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Location: Portland, OR
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| Posted: Mon Nov 10, 2008 2:06 pm Post subject: |
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| EverettB wrote: |
| I don't know the answer to that but the first thought that pops into my head is whether the variable resistor can handle the amperage pulled through it by the wiper motor. |
Yeah, that's my concern too. It seemed like such a simple and easy idea that I got to wondering why no one else has mentioned it. |
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70 140
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Joined: September 22, 2002
Posts: 8471
Location: Ontario Canada
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| Posted: Mon Nov 10, 2008 2:57 pm Post subject: |
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The switch is for sure not up to the task. If you see a headlight switch apart, and see the resistor mechanism you will see why.
The heat from trying to operate the motor at a slower speed will melt the thin resistor. |
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Culito
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Joined: December 07, 2006
Posts: 5882
Location: Columbia Missourah
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| Posted: Mon Nov 10, 2008 4:16 pm Post subject: |
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You could still use the headlight switch if you use each one of the 'clicks' as a speed. Half-out, slow, full-out fast. A little creative wiring + a few heavy duty resistors would work.
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galexander
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Joined: April 17, 2003
Posts: 637
Location: Round Rock, TX
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| Posted: Sun Nov 16, 2008 11:02 pm Post subject: |
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62Baido, wanted to say THANKS, I re-adjusted using the 4 long bolts after soldering a new power wire, fresh grease, cleaning the tiny grooves where the brushes rub against and fired it up.
Works great!
Another item checked off the '63 Single Cab to do list.
thanks again
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62Baido
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A Capps
Samba Member
Joined: December 18, 2004
Posts: 36
Location: Tucson, AZ
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| Posted: Sun Jun 13, 2010 8:04 pm Post subject: Wiper motor wiring |
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I need to know what the function of the black wire power going into my 1965 wiper motor is for. It fires-up a bi-metal strip, which makes the motor oscillate, The black/purple wire makes it run willy. I have no idea what the brown with is for, I dont see why a ground is required. The old wiring diagram (Thanks Enerett) show only a hot and ground going in to the basic 1963 motor. I think the solid black must be a return-to-resting position feature.
Anybody know what is what with a three wire wiper motor?
Capps |
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bill may
Samba Member
Joined: August 27, 2003
Posts: 14160
Location: san diego,ca
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| Posted: Mon Jun 14, 2010 5:25 am Post subject: Re: Wiper motor wiring |
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| A Capps wrote: |
I need to know what the function of the black wire power going into my 1965 wiper motor is for. It fires-up a bi-metal strip, which makes the motor oscillate, The black/purple wire makes it run willy. I have no idea what the brown with is for, I dont see why a ground is required. The old wiring diagram (Thanks Enerett) show only a hot and ground going in to the basic 1963 motor. I think the solid black must be a return-to-resting position feature.
Anybody know what is what with a three wire wiper motor?
Capps |
3rd wire is self park feature. 1965 was 1st year for self parking.
1965 was only year for 3 wire wiper motor that was small like pictured.1966 was 1 year only 6 volt with a round housing hanging off it.
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