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Wide front casting SC

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fixerupper
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PostPosted: Tue Dec 05, 2017 11:27 am    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

We have all seen brazing done 50-75 or 100 years ago on old mowers etc that is still holding so it does work in the right hands. I just might give it a whirl. I have a hunch the owner does not want a repaired piece up there, rather a new looking piece and if that is the way he wants to go I will do it that way and keep the old brazed up piece. How much pre heating do you recommend?
 
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Case Nutty 1660
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PostPosted: Tue Dec 05, 2017 2:00 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

I have three Sc's with wide front,, and had another one that lived its life with loader on it,, none have broken,, my DC also has a WF and has lived its life on a loader as well, betting it is more abuse than a design flaw
cnt
 
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fixerupper
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PostPosted: Tue Dec 05, 2017 4:03 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

CVPost-Case Nutty 1660 wrote:
(quoted from post at 15:00:54 12/05/17) I have three Sc's with wide front,, and had another one that lived its life with loader on it,, none have broken,, my DC also has a WF and has lived its life on a loader as well, betting it is more abuse than a design flaw
cnt


That makes me feel better about just brazing it and getting it over with. I have it apart and cleaned up and Veed out. Might braze it tomorrow but I have to check to make sure I have enough rods. I ground out quite a bit of material as it was a meandering crack. As soon as I figure out how to wring a picture out of the cell phone I will post a pic for the approval of the welding/brazing experts.
 
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fixerupper
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PostPosted: Tue Dec 05, 2017 4:10 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

fixerupper wrote:
(quoted from post at 17:03:01 12/05/17)
CVPost-Case Nutty 1660 wrote:
(quoted from post at 15:00:54 12/05/17) I have three Sc's with wide front,, and had another one that lived its life with loader on it,, none have broken,, my DC also has a WF and has lived its life on a loader as well, betting it is more abuse than a design flaw
cnt


That makes me feel better about just brazing it and getting it over with. I have it apart and cleaned up and Veed out. Might braze it tomorrow but I have to check to make sure I have enough rods. I ground out quite a bit of material as it was a meandering crack. As soon as I figure out how to wring a picture out of the cell phone I will post a pic for the approval of the welding/brazing experts.


OK, here's a pic or two
 
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L.Fure
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PostPosted: Tue Dec 05, 2017 4:14 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

fixerupper wrote:
(quoted from post at 20:27:32 12/05/17) We have all seen brazing done 50-75 or 100 years ago on old mowers etc that is still holding so it does work in the right hands. I just might give it a whirl. I have a hunch the owner does not want a repaired piece up there, rather a new looking piece and if that is the way he wants to go I will do it that way and keep the old brazed up piece. How much pre heating do you recommend?


If you file the repair, and sand it smooth before you paint it you will never know it was repaired. As for preheating I really don't have a definitive answer for you. You will have to warm up the crack a few inches at a time before you concentrate your flame to start your puddle. If you move the flame forward down the crack while you're adding in the brass, an inch or two of the area ahead of your puddle will preheat as you go along. Angling the flame forward a little will help preheat where you will be laying the brass. After you get a couple of inches brazed, you might have to warm up a few inches ahead, then go back to laying the brass. You'll just have to keep the flame moving all through the process. Be sure to wear eye protection while doing this. You might add the brass before you have a good puddle, and the beads of melted brass will explode. Spattering little bits of hot brass all over, including your face. So don't rush it. Brazing cast iron is getting to be a lost art. Anyone that wants to do their own repairs should learn how to braze. It may come in handy in the future.
 
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fixerupper
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PostPosted: Tue Dec 05, 2017 4:19 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

fixerupper wrote:
(quoted from post at 17:10:01 12/05/17)
fixerupper wrote:
(quoted from post at 17:03:01 12/05/17)
CVPost-Case Nutty 1660 wrote:
(quoted from post at 15:00:54 12/05/17) I have three Sc's with wide front,, and had another one that lived its life with loader on it,, none have broken,, my DC also has a WF and has lived its life on a loader as well, betting it is more abuse than a design flaw
cnt


That makes me feel better about just brazing it and getting it over with. I have it apart and cleaned up and Veed out. Might braze it tomorrow but I have to check to make sure I have enough rods. I ground out quite a bit of material as it was a meandering crack. As soon as I figure out how to wring a picture out of the cell phone I will post a pic for the approval of the welding/brazing experts.


OK, here's a pic or two





Here's the crack ground out. The depth doesn't show up in the picture but it's about 3/8" deep. The casting is 1/2" thick. The other fix is welding and is holding but it isn't Veed out very far, maybe 1/8". I got a little carried away and off course with the grinding.
 
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ralph.meyer
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PostPosted: Tue Dec 05, 2017 5:28 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

CVPost-55 50 ron wrote:
(quoted from post at 09:59:56 12/04/17) Did you try Don at Rusty Acre? 507-433-0073 Near Austin, MN


Checked both my parts front as well as the complete wide front SC in my collection. Both are broken . The parts one is not so bad as yours but is cracked from the side like yours to to center in the front and is welded. Probably not worth the freight to get it to you .
DC fronts are much heavier and probably don't fit but I have one.
 
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ralph.meyer
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PostPosted: Tue Dec 05, 2017 5:41 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

If I was to repair this, after welding/ brazing I would grind the welds down to the original then make a ring of 3/8 or 1/2 steel with an ID to match the OD of the repaired casting to encircle as much the lower part of the casting as possible then weld that around. Then that would fix it for once and for all.
 
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fixerupper
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PostPosted: Tue Dec 05, 2017 5:42 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

Thanks for taking the time to look Ralph. I could get hold of a complete DC with wide front for an advertised $400 but a DC is a different animal and besides I would have to travel 150 miles to get it.
 
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L.Fure
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PostPosted: Tue Dec 05, 2017 6:41 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote


You'll have to get the v-notch over the crack better than you have it. Are you sure the previous repair is a arc weld. Looks like a brazing job to me. Do remember to drill a 1/8" hole at the very end of the crack. Otherwise the crack will continue beyond where you will be heading it. Maybe you better get larger than 1/8" brazing rod and a can of flux. You have quite a large area to fill in. Keep us posted on your progress.
 
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fixerupper
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PostPosted: Tue Dec 05, 2017 7:14 pm    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

Ya, I ground it out pretty wide. Wasn't paying close enough attention to where the crack went. I did some grinding on the previous fix and it was silver colored instead of bronze. Here's a pic of the inside of the bore.

The straight line crack is the previous crack the diagonal crack is the one I am working on. After looking at this picture the top of the diagonal crack goes along ways around the bore at the top. It doesn't show that much on the outside.
 
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L.Fure
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PostPosted: Wed Dec 06, 2017 3:48 am    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote


See if you can clean the grease out of the crack. Brake cleaner and a wire brush should help. The flux on the brazing rod should keep any left over grease out of the bronze.
 
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Case Nutty 1660
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PostPosted: Wed Dec 06, 2017 4:09 am    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote

I have a cast front wheel of a model "S" tractor that had been broken many years ago and they had it brazed,, MAN the guy who did it was a artist for sure at brazing,, if I can get to it and get a pic I will it shows how it can be done,, I can braze but nothing like this job was done,, like you say its becoming a lost art today
cnt
 
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L.Fure
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PostPosted: Wed Dec 06, 2017 4:31 am    Post subject: Re: Wide front casting SC Reply to specific post Reply with quote


One more thing to add. If you do decide to file the bronze to smooth it out before painting, you should chalk your file before you use the file. Chalking a file involves working chalk into the grooves of the file. It keeps the bronze material from packing into the bottom of the grooves making it impossible to clean the file with a file card. Don't fill the grooves completely with chalk, just file the piece of chalk you use lightly so the bottom of the grooves have some chalk in it. Clean the file often, and apply more chalk as you're filing your repair. Just a little something I learned in the course of watch repair.
 
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fixerupper
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PostPosted: Wed Dec 06, 2017 12:53 pm    Post subject: Well, here it is Reply to specific post Reply with quote

Here's the brazing job. Craters of the moon.
 
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