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Farmall & IHC Tractors Discussion Forum
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Dent in Gas Tank

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Douglas Fisk

06-09-2006 17:03:45




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I have a Super C tractor with a serious, sharp dent in the upper left hand corner of the gas tank. The dent is approximately 4 to 5 inches going down the side.
Any suggestions on fixing it.




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Mark in WA

06-10-2006 13:25:48




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 Re: Dent in Gas Tank in reply to Douglas Fisk, 06-09-2006 17:03:45  
I had the same problem with the tank on my super A. I consulted with the local automotive paint store in Spokane and they recommended Fiber Tech. It's a product used in the same way as bondo but it is full of fibers and imprgnated with Kevlar so it won't crack out over time. You can fill with this product and finish with a finish coat of bondo. This is the toughest stuff I've found for this problem. I too went through the pressurization technique and stud welder and they won't even touch the thick metal these tanks were made of. The thing that amazes me is how the previous owner ever got dents in the locations he did. THe tractor sure had a hard life but with a lot of TLC, she is coming back to life. I would like to post my work so far but am unsure of how to post a picture. One of the best techniques I found while sanding was to wrap my sandpaper around a paint stick and use it to get the right contour. My brother in law is an autobody man and taufgt me the technique, and it works great. Just take your time and keep working at it. Best of luck in getting the dent out.

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PurdueAg

06-09-2006 20:45:18




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 Re: Dent in Gas Tank in reply to Douglas Fisk, 06-09-2006 17:03:45  
I had a similar large, deep dent in my "C". I used a piece of paper to trace the outline of the dent and then cut a piece of sheet metal to fit just inside the dent and below the level of the undamaged surface. I welded that into place using JB Weld. This allowed me to finish with bondo, but with the sheet metal insert, only a thin layer of bondo was necessary. Now, the tank looks as good as new.

With kind regards,

Tony

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Dan Bear Kelley

06-09-2006 18:42:33




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 Re: Dent in Gas Tank in reply to Douglas Fisk, 06-09-2006 17:03:45  
Here's a thought. Plug the holes in the tank and put a couple PSI of air into the tank. Go easy! You don't want a sheet metal balloon. You just want a little force working in your direction. Then you may be able to assist the air by lightly bumping the metal at the edges of the dent. OR, you could try the stud welder system, assisted by air pressure this way.



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Bus Driver

06-09-2006 17:57:47




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 Re: Dent in Gas Tank in reply to Douglas Fisk, 06-09-2006 17:03:45  
Never tried it, but I have envisioned cutting small hole(s) in the bottom of the tank so that a rod could be inserted and hammered to knock the dents out to rough shape. Hole would then be patched and be invisible by being on the bottom. Top would then require limited amount of Bondo



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Red Dave

06-09-2006 17:14:10




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 Re: Dent in Gas Tank in reply to Douglas Fisk, 06-09-2006 17:03:45  
I've worked on dents in these tanks and lemme tell ya, the steel they made them out of is thicker than it looks. I had one that had a dent in the side so I had a local body shop use their stud welder to weld a stud on the dent to pull it out. They tried 5 or 6 times, but the studs just pulled loose before the dent moved.

I ended up just filling it in with Bondo. Just put on about 1/4 inch at a time and let it get hard before the next layer. If you try to fill it all at once, it can crack. it's been 7 or 8 years and it still looks like there was never a dent there.

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Doug Fisk

06-09-2006 17:19:40




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 Re: Dent in Gas Tank in reply to Red Dave, 06-09-2006 17:14:10  
Thanks for the info on the Bondo. Glad to hear tht you had success with the Bondo and that it lasted so long.



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River Bottom Farmer

06-09-2006 18:47:50




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 Re: Dent in Gas Tank in reply to Doug Fisk, 06-09-2006 17:19:40  
I had a 3 inch circular dent in my gas tank on the 39 H that I am just finishing the restoration on.I took some half inch cold rolled rod and weld it to an old body dolly and bent the rod so it would fit through the fill hole and slowly pounded the dent into submission.Worked around the outside of the dent in a circular motion working my way to the center of the dent.Smoothed down with a file to get the contour right,and finished with some lightweight body filler.Just a skim and sanded down primered and wet sanded.Turn out perfect.It helps to have the coffee pot running and your favorite station on the radio..... You will get it,just takes patience but it will happen..... .RBF

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