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Old 01-01-2021, 01:22 PM   #1
fordyford
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Default 91A-8600 Radiator fan

I have saved 2 of these NOS crankshaft mounted fans and finally got both at the same location. One has a longer hub than the other. Any one know why? Car/truck or 60HP ?

Thanks
Keith
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Old 01-01-2021, 01:57 PM   #2
marko39
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Default Re: 91A-8600 Radiator fan

I believe Merc is longer than the ford due to the longer front end.
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Old 01-01-2021, 02:21 PM   #3
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Default Re: 91A-8600 Radiator fan

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I believe Merc is longer than the ford due to the longer front end.
You are correct.
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Old 01-01-2021, 02:29 PM   #4
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Default Re: 91A-8600 Radiator fan

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You are correct.
And I learned that from you!
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Old 01-01-2021, 03:28 PM   #5
flatjack9
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Default Re: 91A-8600 Radiator fan

Part # for the Merc fan is 19A 8600
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Old 01-01-2021, 08:46 PM   #6
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Default Re: 91A-8600 Radiator fan

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Please post the hub lengths of the two fans so that we can note the difference for future reference. Thanks
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Old 01-02-2021, 03:52 AM   #7
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Default Re: 91A-8600 Radiator fan

My original Ford parts catalogs give both 1939 Deluxe Fords and 1939 Mercury the same part number for the fan.
91A-8600.
The description for both reads " 16 3/4" - 6 blade "
It also states they both share the same crankshaft pulley and hub assembly.
PN 91A-6312.
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Old 01-02-2021, 05:19 AM   #8
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Default Re: 91A-8600 Radiator fan

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Originally Posted by flatjack9 View Post
Part # for the Merc fan is 19A 8600
"19A-" equates to '41 Mercury. DD
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Old 01-02-2021, 02:20 PM   #9
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Default Re: 91A-8600 Radiator fan

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Originally Posted by fordyford View Post
I have saved 2 of these NOS crankshaft mounted fans and finally got both at the same location. One has a longer hub than the other. Any one know why? Car/truck or 60HP ?

Thanks
Keith

The longer hub is for the 1941 Mercury and is a 19A-8600 part. The 91A-8600 fan is used on the 39 and 40 Mercury and the 39 Deluxe, all 85 HP 1940 model cars and pickup and all V8 model 1941 Ford cars and pickup.

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Old 01-02-2021, 02:34 PM   #10
GaryU.
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Default Re: 91A-8600 Radiator fan

I still want to know the hub lengths if possible. Like Mac I'm always wanting more knowledge for myself and here.
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Old 01-02-2021, 07:51 PM   #11
fordyford
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Default Re: 91A-8600 Radiator fan

Thanks for all of the input. My short 91a-8600 measures 3 5/8 to 3 3/4"

The long 19A-8600 measures 4 1/2 to 4 5/8".

Both are 6 blade with alternating long and short blades

Keith
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Old 01-02-2021, 09:31 PM   #12
deuce_roadster
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Default Re: 91A-8600 Radiator fan

I have a known 19A fan, will measure it tomorrow. How are you measuring it, from the mounting surface to the backside of the fan blades?
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Old 01-03-2021, 06:28 AM   #13
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Default Re: 91A-8600 Radiator fan

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I have a known 19A fan, will measure it tomorrow. How are you measuring it, from the mounting surface to the backside of the fan blades?
That’s how I measure them......in effect, the full length of the actual hub itself.
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Old 01-03-2021, 12:20 PM   #14
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Default Re: 91A-8600 Radiator fan

Mac VP I get 3" exactly on the 91A --- 3 5/8" on the 19A . I hooked a tape on the flare at the base where the blades mount and measured to the mounting flange (not the part that indexes into the crank pulley) These are new, out of the FoMoCo box.
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Old 01-03-2021, 01:37 PM   #15
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Default Re: 91A-8600 Radiator fan

Perfect! Thanks for doing the measurements.
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Old 01-03-2021, 02:03 PM   #16
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Default Re: 91A-8600 Radiator fan

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Originally Posted by deuce_roadster View Post
Mac VP I get 3" exactly on the 91A --- 3 5/8" on the 19A . I hooked a tape on the flare at the base where the blades mount and measured to the mounting flange (not the part that indexes into the crank pulley) These are new, out of the FoMoCo box.
Just remember one thing Mike, and Mac. Even though it is NOS in a FoMoCo box, "FoMoCo" is the 'key' here. On 11/20/1948, a U.S. federal trademark registration was filed for FoMoCo. This trademark is owned by Ford Motor Company,
One American Road
Dearborn, MI 48126. The USPTO has given the FoMoCo trademark serial number of 71569147.

So, even though it is NEW, and it is a legitimate Ford piece, it should be considered a "replacement part" manufactured no earlier than '49, and MAY not necessarily replicate the original fan PRECISELY! DD
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Old 01-03-2021, 02:17 PM   #17
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Default Re: 91A-8600 Radiator fan

The one I got for my 39 deluxe has a second layer of metal on the blades where the rivets are. Most others I've seen don't have this. It has a 3" hub.
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Old 01-03-2021, 02:21 PM   #18
deuce_roadster
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Default Re: 91A-8600 Radiator fan

Dick, correct. My 91A box is Ford, not FoMoCo but the 19A was.
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Old 01-03-2021, 02:48 PM   #19
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Default Re: 91A-8600 Radiator fan

Quote:
Originally Posted by V8COOPMAN View Post
Just remember one thing Mike, and Mac. Even though it is NOS in a FoMoCo box, "FoMoCo" is the 'key' here. On 11/20/1948, a U.S. federal trademark registration was filed for FoMoCo. This trademark is owned by Ford Motor Company,
One American Road
Dearborn, MI 48126. The USPTO has given the FoMoCo trademark serial number of 71569147.

So, even though it is NEW, and it is a legitimate Ford piece, it should be considered a "replacement part" manufactured no earlier than '49, and MAY not necessarily replicate the original fan PRECISELY! DD
Coopman, You have brought forth a very important point that many apparently don't understand. Lord knows I've frequently found it necessary to explain to "unhappy" owners on the concourse when they've received deductions for installing such (service) parts.
And, as a side note of sorts, just because Drake and others list a part as correct and / or fits years "X through X" does not necessarily a correct part make.
The parts books are good for one thing: indicating parts that were offered for SERVICE that will fit and function. As for being correct? Yeah, maybe. And then again, maybe not.
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Old 01-03-2021, 02:59 PM   #20
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Default Re: 91A-8600 Radiator fan

Quote:
Originally Posted by deuce_roadster View Post
Mac VP I get 3" exactly on the 91A --- 3 5/8" on the 19A . I hooked a tape on the flare at the base where the blades mount and measured to the mounting flange (not the part that indexes into the crank pulley) These are new, out of the FoMoCo box.



I measured the hub on my '41 Merc Town Sedan and it is also 3 5/8" as above. Puts the front edges of the six blade fan approx 7/8" from the radiator core.


Terry
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