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Ford 9N, 2N & 8N Discussion Forum
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Reverse the radiator fan direction ??

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Pooh Bear

06-15-2005 22:34:10

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I have read on here some about some radiators have
fans that blow forward instead of back.
My fan blows back. Can I switch to one that blows forward.
That hot air hitting me makes it uncomfortable to mow.
Is this reasonable to do or not.

1949 8N front mount converted to 12 volt.


Pooh Bear

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06-16-2005 06:48:45

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 Re: Reverse the radiator fan direction ?? in reply to Pooh Bear, 06-15-2005 22:34:10  
I have a 9N with the original pusher fan. It seems to work just fine for what I use it for and I have never had overheating issues or any other problem with it.


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06-16-2005 06:18:35

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 Re: Reverse the radiator fan direction ?? in reply to Pooh Bear, 06-15-2005 22:34:10  
Don't do it!

Now you can take your grill off if the flues get clogged with debri. If you put a pusher fan on it you better be putting a screen that will completely cover the entire engine compartment top sides and bottom or that debri will get plastered against the inside of the radiator flues and it almost impossible to remove.

Most bull doziers have pusher fans but the are all screened and even then the radiator cloggs with debri and oil residue making it necessary to steam clean the entire radiator from time to time when engine over heating begins to occur.


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Art Wallin

06-16-2005 04:28:39

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 Re: Reverse the radiator fan direction ?? in reply to Pooh Bear, 06-15-2005 22:34:10  
Pooh Bear Many fork lift trucks use outboard fans ( if used in a wharehouse)and make excellent vacuum cleaners. They suck all the dust off the floor and deposit it on any surface of the engine and related parts that may have oil on them. They are filthy animals to work on unless steam cleaned first. If a tractor had an outboard fan it would be drawing air from any place behind the fan to include the area behind the forward wheels(dusty) and around the engine, to include the hot exhaust manifold and so introducing hot air to the radiator. The air on an inboard fan is drawing cooler air from in front of the tractor even if it is 100 degrees outside. Your choice, hot tractor or hot operator. Maybe an air deflector in front of the operator might help. Just some food for thought.
Art in Texas

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Dell (WA)

06-15-2005 23:10:09

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 Re: Reverse the radiator fan direction ?? in reply to Pooh Bear, 06-15-2005 22:34:10  
Pooh..........yes, iff'n you can find a pusher fan instead of the sucker that you currently have. And that is exactly why Ford had the pusher fan, to keep from blowing hot air back on the operator. It semi-works. It is not radiator efficent as the sucker, so iff'n yer radiator is clogged, you may overheat.........Dell

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Same question

06-16-2005 03:49:13

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 Re: Reverse the radiator fan direction ?? in reply to Dell (WA), 06-15-2005 23:10:09  
I too am thinking of a pusher fan for cooler air while I mow, why is the pusher fan not radiator efficent as the sucker??? I work at a saw mill and all are skidders and payloaders have pusher fans.

Thanks Luke

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JDrew in NW IN

06-16-2005 05:45:11

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 Re: Reverse the radiator fan direction ?? in reply to Same question, 06-16-2005 03:49:13  
My WAG...

Pusher fans and puller fans of the same geometry will move similar amounts of air through the radiator, however:

-the pusher is pushing engine-hot air through the radiator so your low temp threshold is higher.
-the puller is also blowing air along the engine which has a bit of a cooling effect as well.

I'd imagine changing to a pusher fan and adding a shroud to get more efficient air movement might improve the overall effect. Personally, I'm considering making air shutters to mount on the footpegs that could be used to deflect hot air in the summer and direct hot air into the operator in the winter.

my $.02 I am not an engineer, nor do I play one on TV...


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06-17-2005 04:56:23

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 Re: Reverse the radiator fan direction ?? in reply to JDrew in NW IN, 06-16-2005 05:45:11  
Now days when changing an engine fan you need to check it's direction in relation to the engine direction. The reason is with serpentine belts on modern engines some drive the fan backwards to engine rotation. I just recently rescued a 4000# Clark forklift from the junk yard and a fan I had laying around was a reverse flow. Perfect to blow away from engine. You can easily find a reverse fan in a junkyard if it will mount your water pump and have the right diamiter. tim

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