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Old 02-09-2024, 11:25 PM   #1
Skoolie
 
Join Date: Dec 2019
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Radiator cooling fan

Having a heck of a time finding this replacement for my cat3126B engine.i see 8 and 7 blade versions that are also 24 inch diameter which would fit but not sure about the amount of airflow required and less blades might mean less air.please educate me on this.see pics below
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Old 02-10-2024, 12:38 AM   #2
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I think you are correct that fewer blades would mean less air. You may have to go through Thomas or an after market bus parts supplier to find a fan as it is specific to your chassis cooling system rather than the engine model.

Ted
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Old 02-10-2024, 07:39 AM   #3
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look at Borg warner and see what they have.. they have a bunch of different fanblades available, 24 inch 9 blade 6 bolt is a pretty common style.. of cxourse you need t oget the right rotation to fit your application.. and then also solve why it looks like your fan whacked the shroud a few times.. it cant hurt to call a thomas / freightliner dealer and ask for the part number based on your VIN.. then can search a lot easier.. (unless the part number is marked on yours somewhere...
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Old 02-12-2024, 08:15 PM   #4
Skoolie
 
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So I found the part number thru Thomas bus support line today.kysor makes this fan and for some reason is stupid expensive.$500 while 26 inch version fans can be had for around $210.must be a low production model☺️
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Old 02-13-2024, 11:58 AM   #5
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Better find out why it did that or you will ruin the new on as well. Possibly motor mounts so I would look there first, radiator loose and fan shroud moving around? I have seen dump trucks with the same problem and it was a broken motor mount. Check tranny mount also, bell housing bolts.
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Old 02-13-2024, 07:57 PM   #6
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I checked the motor mounts and they are still good.the spacing around the shroud looks even and my clutch did not appear to have any play in it.i know this because I pulled the fan bracket out to remove the fan only to learn that I ordered the wrong fan.my inner fan drive belt was dislodged and a severe cut on the belt barely holding it in one piece.the belt may have got tangled in the fan but not sure. The new fan is freaking expensive!
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Old 02-14-2024, 12:14 PM   #7
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I have a 24" fan but center is slightly different if you are interested.
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Old 02-15-2024, 08:41 PM   #8
Skoolie
 
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I can cut the center round into the Teerdrop shape needed to fit over hub.the issue is all my blades are in the same rotation whereas many other fans have half alternating in opposite direction.i believe my fan may be a suction version fan. Do you have a pic of your fan?
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Old 02-16-2024, 01:01 AM   #9
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How about getting a good fan from Multi-Wing? I replaced my bus's heavy old original 6-blade steel fan (that made more noise than moved air) with a custom-made high-performance 9-blade fan from Multi-Wing that has adjustable-pitch aerofoil-section blades, and the difference is remarkable. Finding a suitable hub may be a problem, but perhaps Multi-Wing can offer something that will fit your engine.

John
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Old 02-16-2024, 10:18 AM   #10
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fan

Mat, Does this look like it would fit? The center is recessed from one side and proud on the other. From what I saw on your pictures the pitch is going the wrong way so it's not gonna work. Pitch is determined by the rotation of the water pump whether it turns directly from the crank balancer or it gets power from the backside of the belt....reverse rotation.
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Old 02-16-2024, 10:38 AM   #11
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https://www.vanderhaags.com/detailvi...?part=25592822


does this looks like the one?
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Old 02-16-2024, 10:34 PM   #12
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Quote:
Originally Posted by Iceni John View Post
How about getting a good fan from Multi-Wing? I replaced my bus's heavy old original 6-blade steel fan (that made more noise than moved air) with a custom-made high-performance 9-blade fan from Multi-Wing that has adjustable-pitch aerofoil-section blades, and the difference is remarkable. Finding a suitable hub may be a problem, but perhaps Multi-Wing can offer something that will fit your engine.

John
Thanks John. I will look into this.😎
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Old 02-16-2024, 10:35 PM   #13
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Yes but my fan is 24inch diameter
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