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From: Lawrence Glickman on 21 Jun 2007 21:00
On Thu, 21 Jun 2007 12:57:19 +0800, "TE Chea" <4ws(a)gmail.com> wrote:

>| Have you looked inside the unit yet?
>No, I could not pull its rear cover ( part #15 in w-page of url
>attached, has ND embossed on it ) off, after removing 3 nuts.
>
>| There should be a steel fan attached to the rear end of the rotor.
>No fan visible in diagram of this w-page, url attached :
>www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&catcgry1=Accord&catcgry2=1990&catcgry3=4DR+DX&catcgry4=KA4AT&c
>atcgry5=ALTERNATOR+%28DENSO%29
>
>
>| ND makes probably the most reliable alternators I have ever seen in
>| production.
>Possible ; how this * can survive such heat amazes me.
>

I had to look twice, with a high power flashlight, inside the back of
my alternator to find the cooling fins, but they are present in my
Vulcan V6 Ford engine alternator. At first it didn't look like there
were any, so you have to look closely. Maybe reading glasses will
help. Mine are right at the coil windings.

Lg

From: Tegger on 21 Jun 2007 21:35
"TE Chea" <4ws(a)gmail.com> wrote in news:467a3295_1(a)news.tm.net.my:

>| Have you looked inside the unit yet?
> No, I could not pull its rear cover ( part #15 in w-page of url
> attached, has ND embossed on it ) off, after removing 3 nuts.


Wiggle it some more. 3 nuts is all that holds it on.


>
>| There should be a steel fan attached to the rear end of the rotor.
>|
> No fan visible in diagram of this w-page, url attached :


<snip>


Go look at your own alternator. Pictures are not always worth a thousand
words. Sometimes they're worth less than zero words.

ND alternators have, not one, but TWO fans.

And on further investigation, it is clear I was wrong in my original guess
that one fan was a puller and one a pusher. BOTH fans are pullers. Both
fans pull air in from their respective ends, then exhaust it radially
through the slots in the perimeter of the alternator casing. It appears
that this is the sole purpose of those slots: Air exhaustion and alternator
cooling.


--
Tegger

From: Comboverfish on 22 Jun 2007 00:47
On Jun 21, 8:35 pm, Tegger <teg...(a)tegger.c0m> wrote:
>Both fans pull air in from their respective ends, then exhaust it radially
> through the slots in the perimeter of the alternator casing. It appears
> that this is the sole purpose of those slots: Air exhaustion and alternator
> cooling.
>
> --
> Tegger

That might be the original reason for their existence, but I like to
use them as stroboscopic diffusers for my alternator's neon lighting.
What, am I alone here?

Toyota MDT in MO

From: Tegger on 22 Jun 2007 07:23
Comboverfish <comboverfish(a)yahoo.com> wrote in
news:1182487650.509123.157340(a)m36g2000hse.googlegroups.com:

> On Jun 21, 8:35 pm, Tegger <teg...(a)tegger.c0m> wrote:
>>Both fans pull air in from their respective ends, then exhaust it
>>radially
>> through the slots in the perimeter of the alternator casing. It
>> appears that this is the sole purpose of those slots: Air exhaustion
>> and alternator cooling.
>>
>>
>
> That might be the original reason for their existence, but I like to
> use them as stroboscopic diffusers for my alternator's neon lighting.
> What, am I alone here?
>
>
>
>


You are utterly, tragically alone.

Stroboscopic lighting in an alternator indeed. <snorts in disgust>

Why can't you be like decent, tasteful people and stick to stroboscopic
under-car neon lighting?


--
Tegger

From: Steve Austin on 22 Jun 2007 07:28
Comboverfish wrote:
> On Jun 21, 8:35 pm, Tegger <teg...(a)tegger.c0m> wrote:
>> Both fans pull air in from their respective ends, then exhaust it radially
>> through the slots in the perimeter of the alternator casing. It appears
>> that this is the sole purpose of those slots: Air exhaustion and alternator
>> cooling.
>>
>> --
>> Tegger
>
> That might be the original reason for their existence, but I like to
> use them as stroboscopic diffusers for my alternator's neon lighting.
> What, am I alone here?
>
> Toyota MDT in MO
>
I always thought the slots were to let the magic smoke out when the
alternator fails.
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