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Old 04-22-2019, 07:16 AM   #1
BRENT in 10-uh-C
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Default A-8145 Fans Housing (Shroud) A vs. AA question

As I understand it, there are two A-8145 housings (4 revisions) that were made with the major difference being the clips vs. the channel at the bottom for wiring. Did the 1928 AA share this same housing, -or is there a different one for the AA that I am not seeing?


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Old 04-22-2019, 07:29 AM   #2
Steve Plucker
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

Great question Brent...Do not see one in the 28-29 PPL's but that does not mean anything.

I would think that they were one in the same.

Neil Wilson would know.

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Old 04-23-2019, 09:09 AM   #3
BRENT in 10-uh-C
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

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Great question Brent...Do not see one in the 28-29 PPL's but that does not mean anything.

I would think that they were one in the same.

Neil Wilson would know.

Pluck

Thanks Steve. My Jan 1 1928 book shows it on Page 21 however as you say, my Oct 1 1929 does not show it, nor even a part number listing. I have loaned my late 1928 and my early 1929 for someone to reproduce it in a searchable PDF so I can't verify in those two books right now. To me, it would have seemed this item would have been used throughout 1928 and '29 on AA's due to radiator size. You know there had to be a problem with heating or they would have never revamped the cooling system for the M30-31 AA.
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Old 04-23-2019, 09:25 AM   #4
Steve Plucker
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

Brent,

I failed to "add" to the 28-29 PPL's...by that if there was one specific for the AA Truck, I would think that it would of been listed in the AA Section of the booklet which it is not.

I have the other two booklets...It is in the October 1928 but not in the June and August nor the October 1929 issues anywhere.

Was there a "specific" size of radiator for 28-29 "AA" trucks OR was it the same as the "A" models? PPL's do not say. Not until June 1930 does the PPL's list a radiator for the AA Trucks.

Pluck

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Old 04-23-2019, 09:41 AM   #5
Joe K
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

My first recollection was that the early 28-29 radiators were the same between the cars and the truck. This would have been the era of the "funnel top" radiator which had tubes of superior heat release compared to later production. (oval tubes instead of round or losenge shape?)

But I think it has been noted in the literature that the AA trucks of both early and late production suffered a bit with a "gap" that is present or can develop between the radiator shell and the hood - caused by the larger (thicker as in more rows) AA radiator? Hence, finally later in production, the development of the thicker "truck" radiator shell (the one without the "widow's peak") to formally close this gap.

This end thought is proven out in my 1931 parts list (available list reprint - others have been done since then) where the A-8005-AR radiator (car) lists for $15.50 and the AA-8005-AR radiator lists for $17. A larger (thicker) radiator is obviously more money? The truck radiator shell shows for the taller 30-31 radiator but no equivalent part shows for the 28-29 radiator? Maybe the gap was "adjustable" or not considered significant enough for 28-29 to warrant a fix?

Still the commentary about "gapping" must be from this transition to and availability of two radiators? The A and AA radiators MIGHT have been the same for earliest production?

I guess we need to look at the early parts list.

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Old 04-23-2019, 09:46 AM   #6
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

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Pluck and I are on the same page (no pun),...I think there were just the two..
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Old 04-23-2019, 10:12 AM   #7
Bob C
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

Page 450 April 28, 1930 of the Service Bulletins address the 4 row radiator for
the 82A and 76A AA's.


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Old 04-23-2019, 10:35 AM   #8
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

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Page 450 April 28, 1930 of the Service Bulletins address the 4 row radiator for
the 82A and 76A AA's.
Bob
Interesting - just before the end of the 82A body style and the transition to the 30-31 body.

Its like they got forced into it because of the greater demands/service of the Borg-Warner setup and perhaps discovered it "late" in the October '29 to May '30 transitional period.

Probably the same manufacturer was tagged for both AA-8005-AR and AA-8005-B

I was going to "retro" a late 30 rolling chassis and use the 82A body and nose. I even had the 30-31 topped "transitional" gas tank that fits the 28-29 body. It was during this research I came upon the fact that I could use a "regular" Model A radiator - in part to avoid "gapping" issues and in part because it worked - or maybe it didn't so well?

Project cancelled (job change) and chassis sold to a buyer who came from Texas to get it. (26K original miles on that chassis!)

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Old 04-25-2019, 04:02 PM   #9
Neil Wilson
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

Per the RGJS pages E 20 - Through March 1930 the A chassis radiator was used for the AA. For March 1930 through June 1930 radiator AA-8005 was used which was the same size as the prior radiator but had 4 rows of oblong tubes.


Radiator shells and shrouds were the same as the A commercial chassis through June 1930.


Starting June 1930 (with the 76-B, 82-B, and 85-B radiator AA-8005-B was used. This radiator required the use of AA radiator shells (black painted steel and stainless steel for some AA types)
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Old 04-25-2019, 04:09 PM   #10
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Default Re: A-8145 Fans Housing (Shroud) A vs. AA question

Thanks Neil!!
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