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07-15-2020, 07:42 PM | #1 |
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Join Date: Feb 2011
Location: Sandy, OR.
Posts: 157
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Fan came apart!!
First time posting on this side of FB as I am a Model A guy.
I picked up this pretty nice stock '39 pickup a little over a year ago and just got it back on the road. Test drive #2 and the metal fan blew apart and really caused some ugly damage. I've heard of this happening in Model A's, so that it why some of us put on those ugly plastic fans. The previous owner had upgraded to a 12V system and I think that is where the problems began. I need your help. When switching to a 12V system, is there a conversion kit that includes a fan and spacer that attaches to the new alternator? Is this sold as a complete unit? I don't know where to start on this and could use some ideas, perhaps some vendors and or parts numbers. Give me your ideas guys! Thank you! |
07-15-2020, 07:54 PM | #2 |
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Join Date: May 2010
Location: East Shore of LAKE HOUSTON
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Re: Fan came apart!!
I hate to hear that this happened to you, but the damage in this picture is an absolute badge of honor that I would have to leave AS IS!! DD
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07-15-2020, 08:28 PM | #3 |
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Re: Fan came apart!!
>>>is there a conversion kit that includes a fan and spacer that attaches to the new alternator? Is this sold as a complete unit?>>>
Maybe. But I made my own 10si/12si adapter to accommodate the original gen-mounted metal fan just like yours. Ran it for a short while. Then decided 'Nope, the risk is too great'. Currently running without a fan. But plan to mount a shrouded 14" electric just in case it gets too hot. 8^) Jack E/NJ |
07-15-2020, 08:37 PM | #4 |
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Re: Fan came apart!!
>>>Just got it back on the road>>>
dd>>>this picture is an absolute badge of honor that I would have to leave AS IS!>>> Agreed. Sort of like a christening including the radiator if it doesn't leak. If it were mine, I'd have to leave it be. Maybe touch up the bare metal spots with a bit of rust-oleum reformer to keep it from rusting and the paint from peeling further. Jack E/NJ |
07-15-2020, 09:05 PM | #5 |
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Join Date: Feb 2011
Location: Sandy, OR.
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Re: Fan came apart!!
Thanks Jack. I was thinking electric plastic fan too, but ugh that is ugly. I would take it over what happened though.
The radiator got completely trashed. Not salvageable. No way will I leave the side panel like it is. The rig is too nice to have that awful looking mess! It just wouldn't fit the rest, plus i lean heavily towards OCD. |
07-15-2020, 11:16 PM | #6 |
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Re: Fan came apart!!
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
07-16-2020, 04:39 PM | #7 | |
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Re: Fan came apart!!
Quote:
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07-16-2020, 05:24 PM | #8 |
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Join Date: May 2010
Location: East Shore of LAKE HOUSTON
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Re: Fan came apart!!
Not quite as damaging to radiators and such, but just as lethal if you're in the way......I've had the little bent-over generator and alternator fan fins separate, usually when you're using a stock-diameter pulley on an engine capable of 6,000 and more RPMs. That's why Chevy and I'm sure others used to install larger diameter pulleys on high-red line engines from the factory. I've managed to implant some small, "outie" dents on a '34 Ford hood (Chevy engine) and a '55 Chevy hood in the past. The noise is almost like a gun shot. DD
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07-15-2020, 10:13 PM | #9 | |
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Re: Fan came apart!!
Quote:
Question: Was this fan mounted to the front of the crankshaft, or to the pulley on front of alternator?
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John "Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein |
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07-15-2020, 10:24 PM | #10 |
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Join Date: Feb 2011
Location: Sandy, OR.
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Re: Fan came apart!!
Thanks John. I thought it was modified, but not certain. It was mounted to the front of the alternator on a very small belt pulley. I think that was the problem as it was maybe 2" in diameter, turning the fan much too fast. This is just a guess, as I have never seen what a correct one should look like.
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07-15-2020, 10:59 PM | #11 | |
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Join Date: May 2010
Location: Near Rising Sun, Maryland
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Re: Fan came apart!!
Quote:
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John "Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein Last edited by JM 35 Sedan; 07-15-2020 at 11:04 PM. |
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07-16-2020, 12:40 AM | #12 | |
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Location: SF Bay Area
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Re: Fan came apart!!
Quote:
John's got it right on all counts. For all those thinking how great it would be to have an alternator, Read John's post again.
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Alan |
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07-16-2020, 12:27 AM | #13 |
Senior Member
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Re: Fan came apart!!
Wow thats a real mess alright ,I don't do them now but have done a few alternator into Ford cases and I always used the Ford front bearing the two tapered rollers back to back ,sorry I don't have a fan one to show you ,I don't trust the ones they stick on a stock alt .
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07-16-2020, 01:41 AM | #14 |
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Join Date: May 2010
Posts: 1,646
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Re: Fan came apart!!
I also agree with John's assessment. There's not much doubt that the blade was weakened by the extra bolt/screw holes and fractured along the axis of those holes. The small pulley and resulting high fan speed could easily have been another factor. Sorry, can't help with regard to changes to the alternator.
- Last edited by Randy in ca; 07-16-2020 at 01:46 AM. |
07-16-2020, 03:49 AM | #15 |
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Join Date: Jan 2012
Location: Lyman,ME.
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Re: Fan came apart!!
Can he convert a 6V generator to 12V and run a stock gen/fan?......Mark
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07-16-2020, 07:55 AM | #16 |
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Re: Fan came apart!!
Yes
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07-16-2020, 10:23 AM | #17 |
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Join Date: Oct 2015
Location: Socal
Posts: 795
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Re: Fan came apart!!
Hate to see that.... brings back bad memories of what happened on my '48.
Fortunately I didn't get any sheet metal destruction though, the jacked up radiator was bad enough. |
07-16-2020, 10:39 AM | #18 |
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Join Date: May 2015
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Re: Fan came apart!!
__________________
The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
07-16-2020, 10:36 AM | #19 |
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Join Date: Oct 2011
Location: Shelton, WA
Posts: 3,800
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Re: Fan came apart!!
Yes, it is horrible. It could have been even worse. Imagine leaning over the side panel observing the running engine, revving it up. That fan blade could have gone through your head. I NEVER stand in line with the fan of a running engine. You probably won't now either. You can get another side panel, fix the rest and be back on the road.
You should inspect all other safety items on the truck (steering, brakes) now that you have seen what incidents poor workmanship can create. Good luck. |
07-16-2020, 11:44 AM | #20 |
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Join Date: Jan 2011
Location: sw minnesota
Posts: 4,577
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Re: Fan came apart!!
you can get one of these https://www.ejwhitneyco.com/automotive.html they are spendy, but have a good reputaion. avoid the similar powergen
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