Stock fan question
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Fleet Owner
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From: NM
Stock fan question
Looking at the parts CD, it shows all stock fans as either 4-blade or 5-blade (mostly later models). I'd swear I've seen a bunch of 6-blade fans? Only concerned with 48 - 52's.
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From: Burbank, WA
I believe the bigger trucks had 6 blade fans. The engine I found to use in the Merc was from a a '51 F6 and had a 6 blade fan. Unfortunately, it was also KO'd to the point I wouldn't trust it.
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From: Burbank, WA
I looked through my original 1955 parts catalog and it shows the same thing; 4 blade fans and 5 blade fans with the extra cooling option. No 6 blades listed. But we have to remember that the parts catalogs show replacement parts available at the time of printing. They're not assembly manuals or a bible of what parts came delivered from the factory. It wouldn't surprise me if a batch of 6 blade fans were used at assembly due to availability, but the replacement for it from the parts counter would have been a 5 blade.
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Fleet Owner
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From: NM
Wayne, the F-3 I posted from a CL ad here has a 6-blade, I don't think it was just Big Jobs. That would make sense, although they also spin their engines a lot more for any given speed, so maybe wouldn't need more fan?
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Fleet Owner
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From: NM
You're talking about your F-1, right? I wonder if you got an F-1 with either of the HD trans options (3-sp HD or 4-sp spur) if the larger fan came as part of the package?
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Welder User
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From: northwest MT
Yes, my F-1. I don't remember if the truck had a 6 blade fan originally.....I used many parts from my "stash" as well.
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From: Burbank, WA
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Marmon-Herrington Man
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From: Central Illinois
Stumbling around the shop tonight this caught my eye. Hadn't paid it any attention, just a spare engine sitting out of the way. But it brought this thread back to memory. So I looked it up in the January, '54, edition of the Chassis Catalog. Part number 59T 8600-B, same 18.5" diameter as the four blade, and listed as "extra cooling" special equipment for all models that used the 239 from '48-'52. The six cylinder counterpart had five blades.
Then I looked in the 1964 reprint catalog, same as the CD I think, and it's not there. Further proof that it pays to have the old paper books as Chuck preached to me long ago. Stu
Then I looked in the 1964 reprint catalog, same as the CD I think, and it's not there. Further proof that it pays to have the old paper books as Chuck preached to me long ago. Stu
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Fleet Owner
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From: NM
Thanks Stu, good info!
Here's why I asked the question. My engine is a EAB Car engine, and uses the narrow belts. These use a completely different fan system, with a sealed cartridge bearing. The concept is that when the bearing wears out, you buy a whole new assembly; fan, spindle with sheave, and bracket. I've never seen one that is worn out but mine also has only 3 blades. Haven't had problems, but...
So I took a spare apart, and figured out that the bearing is. It's the same as a water pump bearing with a longer shaft. With a little adapting, I made one up that uses a Flex-A-Lite 6-blade universal 18.25" fan blade.
Here's why I asked the question. My engine is a EAB Car engine, and uses the narrow belts. These use a completely different fan system, with a sealed cartridge bearing. The concept is that when the bearing wears out, you buy a whole new assembly; fan, spindle with sheave, and bracket. I've never seen one that is worn out but mine also has only 3 blades. Haven't had problems, but...
So I took a spare apart, and figured out that the bearing is. It's the same as a water pump bearing with a longer shaft. With a little adapting, I made one up that uses a Flex-A-Lite 6-blade universal 18.25" fan blade.
Hotshot
Joined: Oct 2009
Posts: 16,173
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From: Burbank, WA
Stumbling around the shop tonight this caught my eye. Hadn't paid it any attention, just a spare engine sitting out of the way. But it brought this thread back to memory. So I looked it up in the January, '54, edition of the Chassis Catalog. Part number 59T 8600-B, same 18.5" diameter as the four blade, and listed as "extra cooling" special equipment for all models that used the 239 from '48-'52. The six cylinder counterpart had five blades.
Then I looked in the 1964 reprint catalog, same as the CD I think, and it's not there. Further proof that it pays to have the old paper books as Chuck preached to me long ago. Stu
Then I looked in the 1964 reprint catalog, same as the CD I think, and it's not there. Further proof that it pays to have the old paper books as Chuck preached to me long ago. Stu
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From: East KY
The fan in Stu's picture is the same as the one on my engine pictured above (Ross crouching beside it). I bought it last summer, but didn't really "notice" the six-blade fan until Ross saw it in person and pointed it out. Very interesting. And that engine came directly from a "barn-find" 1952 F-5 in Minnesota that was purchased on ebay.
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