Alternator Bearing

My alternator is squealing like a banshee but charges fine. I presume
the bearing is about to go FUBAR. It is a NipponDenso 90 amp original
on a 94 YJ 2.5L. Does anyone know of a replacement strategy for the
bearing as neither the Chilton nor Haynes manuals show a breakdown for
bearing replacement. Ooh, I guess a part number for the bearing would
be an added bonus too! As always, all help is appreciated!
Marty

I would first verify that the belt is the right tension and not polished
up from road dust or mud.

I test mine by having a cold off engine and trying to see if I can spin
the alternator pulley by hand. If I can make it hand slip, the belt has
issues. The alternator takes several HP to spin up under load and if
the pulley can hand slip, it will never grab right.

I used to go through 3 belts a year when playing in the mud. Freaking
liquid sandpaper.

If you check your local auto parts store, you might be able to find a
rebuild kit for it. I have one for my Delco and it has a bearing,
brushes, springs and regulator/diode packs. I believe it was in the low
twenty dollar range.

The bearing is a press fit, the biggest bitch is getting the pulley off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Marty wrote:
>
> My alternator is squealing like a banshee but charges fine. I presume
> the bearing is about to go FUBAR. It is a NipponDenso 90 amp original
> on a 94 YJ 2.5L. Does anyone know of a replacement strategy for the
> bearing as neither the Chilton nor Haynes manuals show a breakdown for
> bearing replacement. Ooh, I guess a part number for the bearing would
> be an added bonus too! As always, all help is appreciated!
> Marty

People used to rebuild these all the time, but it has gone out of fashion.
The last time I went into Autozone and asked for a set of bearings and a
brush kit, the kid behind the counter acted like I was walking on water. I
recommend replacing at least both bearings and the brushes at the same time.

Earle

"Mike Romain" > wrote in message
...
> I would first verify that the belt is the right tension and not polished
> up from road dust or mud.
>
> I test mine by having a cold off engine and trying to see if I can spin
> the alternator pulley by hand. If I can make it hand slip, the belt has
> issues. The alternator takes several HP to spin up under load and if
> the pulley can hand slip, it will never grab right.
>
> I used to go through 3 belts a year when playing in the mud. Freaking
> liquid sandpaper.
>
> If you check your local auto parts store, you might be able to find a
> rebuild kit for it. I have one for my Delco and it has a bearing,
> brushes, springs and regulator/diode packs. I believe it was in the low
> twenty dollar range.
>
> The bearing is a press fit, the biggest bitch is getting the pulley off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> Marty wrote:
> >
> > My alternator is squealing like a banshee but charges fine. I presume
> > the bearing is about to go FUBAR. It is a NipponDenso 90 amp original
> > on a 94 YJ 2.5L. Does anyone know of a replacement strategy for the
> > bearing as neither the Chilton nor Haynes manuals show a breakdown for
> > bearing replacement. Ooh, I guess a part number for the bearing would
> > be an added bonus too! As always, all help is appreciated!
> > Marty

Earle Horton wrote:
> People used to rebuild these all the time, but it has gone out of fashion.
> The last time I went into Autozone and asked for a set of bearings and a
> brush kit, the kid behind the counter acted like I was walking on water. I
> recommend replacing at least both bearings and the brushes at the same time.
>
> Earle
Brushes in an alternator??? I used to rebuild generators with brushes. :-)

--
FRH

Frank_v7.0 wrote:
> Earle Horton wrote:
>> People used to rebuild these all the time, but it has gone out of
>> fashion. The last time I went into Autozone and asked for a set of
>> bearings and a brush kit, the kid behind the counter acted like I
>> was walking on water. I recommend replacing at least both bearings
>> and the brushes at the same time. Earle
> Brushes in an alternator??? I used to rebuild generators with
> brushes. :-)

Haven't rebuilt a generator with brushes but I've rebuilt an old
dremmel and a mixer that used them. Bloody hard to find brushes
these days.

As for alternators, I just take them to a local shop and swap out
for a rebuilt. Long time ago I needed a rebuid but they didn't
have one in stock. So they offered to teach me how to rebuild it
and all I had to do was pay for the parts. That was a no-brainer.

--
DougW

"Frank_v7.0" wrote:
>
> Earle Horton wrote:
> > People used to rebuild these all the time, but it has gone out of fashion.
> > The last time I went into Autozone and asked for a set of bearings and a
> > brush kit, the kid behind the counter acted like I was walking on water. I
> > recommend replacing at least both bearings and the brushes at the same time.
> >
> > Earle
> Brushes in an alternator??? I used to rebuild generators with brushes. :-)
>
> --
> FRH

Alternators still have to have 'something' to pick up the spinning
center. Brushes still work quite well for that....

The company that makes the kit I have is called Victory Lap.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Still available through Parts America.

http://www.partsamerica.com/BrandCat...px?MfrCode=VLP


"Mike Romain" > wrote in message
...
> "Frank_v7.0" wrote:
>>
>> Earle Horton wrote:
>> > People used to rebuild these all the time, but it has gone out of
>> > fashion.
>> > The last time I went into Autozone and asked for a set of bearings and
>> > a
>> > brush kit, the kid behind the counter acted like I was walking on
>> > water. I
>> > recommend replacing at least both bearings and the brushes at the same
>> > time.
>> >
>> > Earle
>> Brushes in an alternator??? I used to rebuild generators with brushes.
>> :-)
>>
>> --
>> FRH
>
> Alternators still have to have 'something' to pick up the spinning
> center. Brushes still work quite well for that....
>
> The company that makes the kit I have is called Victory Lap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)

"Frank_v7.0" > wrote in message
...
> Earle Horton wrote:
> > People used to rebuild these all the time, but it has gone out of
fashion.
> > The last time I went into Autozone and asked for a set of bearings and a
> > brush kit, the kid behind the counter acted like I was walking on water.
I
> > recommend replacing at least both bearings and the brushes at the same
time.
> >
> > Earle
> Brushes in an alternator??? I used to rebuild generators with brushes. :-)
>
Brushes for the slip rings. They don't wear down nearly as fast as
commutator brushes in a generator.

Earle

Hi Marty,
Give a quick check to make sure your harmonic balancer pulley isn't
beginning to slide off and our of align:
http://members.cox.net/wilsond/hb/
God Bless America, Bill O|||||||O
http://www.billhughes.com/

Marty wrote:
>
> My alternator is squealing like a banshee but charges fine. I presume
> the bearing is about to go FUBAR. It is a NipponDenso 90 amp original
> on a 94 YJ 2.5L. Does anyone know of a replacement strategy for the
> bearing as neither the Chilton nor Haynes manuals show a breakdown for
> bearing replacement. Ooh, I guess a part number for the bearing would
> be an added bonus too! As always, all help is appreciated!
> Marty