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Old February 8th, 2015, 11:28   #1
TheKid760
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Join Date: Mar 2012
Location: San Diego, Ca
Default Alternator Slip Ring Wear

Hello everyone,

Ive been a lurker for awhile now, on my second ALH, but haven't posted much.

My battery light went on, voltage was low at 11.6, I had alt tested and the machine diagnosed it as faulty regulator.

I pulled it apart and found the brushes to be worn:





and bought a new regulator with brushes for $39, but now I'm wondering how much wear on the slip rings is acceptable before replacement warranted? As ideally I'd like to get my car on the road as fast as possible, yet dont want to have to redo this again in 20k miles. Car has 190k on it and the alternator apperas to be original.





I found these videos on replacing Valeo alternator brushes, slip ring and bearings and think this is within my realm of ability.

Part 1:

http://youtu.be/aVvPzwtxdrM

Part 2:

http://youtu.be/f56-26I6idc

Slip Rings:

http://www.ebay.ie/itm/NEW-REPAIR-KI...958e1#shpCntId

http://www.maniacelectricmotors.com/...FRRgfgodc0YAoQ

http://www.ebay.com/itm/Valeo-OEM-Al...-/171329240614


where can I find the bearing in the states?

One of these?

http://store.eurtonelectric.com/metalbearings-8.aspx
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Old February 8th, 2015, 11:43   #2
[486]
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The upper one is almost worn through, your rotor's junk.

I'd just look for a junkyard alt that looks fresh. Return the regulator you bought and you'll have plenty of money for the junkyard alt.

Last edited by [486]; February 8th, 2015 at 11:46.
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Old February 8th, 2015, 12:20   #3
Vince Waldon
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Quote:
Originally Posted by [486] View Post
The upper one is almost worn through, your rotor's junk.

2X.
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Old February 8th, 2015, 12:22   #4
TheKid760
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Thats what it looked like to me but ive never torn one down.

ordering a new slip ring and bearing now.
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Old February 8th, 2015, 13:18   #5
whitedog
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Well Kid I wish you luck. Honestly I applaud your bravery at tackling this job. I had never thought to replace the brushes rather than the whole regulator, but why not? If you want to jump in and try, good on you.

NAPA has a 6202 bearings, but the picture I saw was unsealed. You might want to talk with them about it and see if they can get you a sealed bearing.

It looks like for less than $30 and some of your time, you can give it the old college try. If it doesn't work, you are only out a little bit.
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Old February 8th, 2015, 14:16   #6
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The OP has a new regulator, so brushes are not an issue.

The slip rings are badly worn, but new slip rings are available for a modest price and are easy to replace, so why scrap the whole alternator?

Bearings should be available at any decent auto parts store or industrial supply company. The sealed ones will have a 2RS(2 Rubber Seals) suffix to the 6202 or 6303 number.
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Old February 8th, 2015, 14:19   #7
whitedog
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Thanks. I knew there was some suffix to the 6202 for sealed.

Not that I will remember the next time, but still...
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Old February 8th, 2015, 14:43   #8
TheKid760
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Yes the regulator was only $39 with new brushes and brushes were $7 so I just ordered the reg. ill find the bearing online and order it today with the slip ring.

Thanks for the info on the bearings.


Misspelling courtesy of my fat fingers...
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Old February 8th, 2015, 14:47   #9
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Don't quote me on the bearing numbers. They came from my WOM (Write Only Memory)
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Old February 8th, 2015, 14:57   #10
TheKid760
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I found two bearings,

to confirm, I want rubber, not metal seal?

http://store.eurtonelectric.com/bear...premium-1.aspx

http://store.eurtonelectric.com/bearing6202premium.aspx
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Old February 8th, 2015, 16:36   #11
[486]
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metal ones are just shields not actually seals

good luck
junkyard alt for $50, or $80 in parts into your alt
you're making the same decision I always make
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Old February 8th, 2015, 16:41   #12
whitedog
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But what does the junk yard alternator need? That's where I get hung up. It may need the same thing so then you are into it for $130.
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Old February 8th, 2015, 16:47   #13
[486]
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Quote:
Originally Posted by whitedog View Post
But what does the junk yard alternator need? That's where I get hung up. It may need the same thing so then you are into it for $130.
usually nothing

because alternators last for just about forever, and a gas motor one'll have less wear on the overrunning pulley
Usually if you look at car-part.com one place'll have 5 on the shelf, go there and pick out the freshest looking one. Or go to u-pull it and grab one with reman stickers on it.

My truck's one went out a bit ago, same issue, slip ring wore through to plastic, it had 300K miles in the oilfield and a farm. grabbed one off an explorer and it's even got a lifetime warranty from the JY, if it dies, just drag it in and they'll give me another.
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Old February 8th, 2015, 16:57   #14
TheKid760
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Call me what you will but I'd rather spend $80 on trying to fix it properly myself and risk failing and having to buy a parts store alt than gambling on a scrap yard part.

Junk yards have their purpose, but for me it's for cores, unavailable parts, or parts to be used on something they were never intended for.


Misspelling courtesy of my fat fingers...
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Old February 8th, 2015, 17:00   #15
[486]
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eh, 'sall good
I could spend a few hundred on an upgraded clutch set, but instead I'm piecing together junk that might work, lol
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