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1947 John Deere B Project (radiator)

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Bob Watkins, Ohio
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PostPosted: Tue Jan 14, 2014 1:05 pm    Post subject: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I am restoring this tractor. Of course I"ve run into some problems. Mostly bolts that twist off when I"m taking it apart. Disassembled the radiator a few days ago. The bottom was not much trouble. twisted off some bolts but a little heat did the trick. The top of the radiator is more challenging! Twisted off 8 bolts and the overflow tube connector nut. A little heat did nothing. Drilled some of them out ok. Broke off drill bits in two of the threaded holes and cannot get them out. The more I mess with the bits, the deeper they seem to go and the more stuck they are. Bought a carbide bit for my Dremel. Hope I can grind them out? As for the overflow tube? I heated it several different times. I finally twisted the nut off even with the cast. I tried drilling and a small chisel. I was hoping to not destroy the threads but now I just want the piece out of there. I bought a bigger bit. There is no pressure in the radiator on this model. Does anyone know if I can solder, epoxy or weld the drain tube into the cast? Anyone have any ideas? Thanks,
Bob
 
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Mike M
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PostPosted: Tue Jan 14, 2014 1:07 pm    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

You say a little heat ? like a propane torch ?
if so these do little to no good for rusted tractors you need an oxy/ace torch.
 
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jeo46
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PostPosted: Tue Jan 14, 2014 1:15 pm    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Put a 3/8 hex nut over twisted off bolt and weld it to bolt with small rod. Do not get so hot it destroys nut. Wait for nut to cool and turn it lightly both ways. Heat must go into bolt to loosen it. May take a couple three tries but has worked many time in past for me.
 
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Machinery-Man
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PostPosted: Tue Jan 14, 2014 1:18 pm    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I'm with Mike....on this type work you need to wire brush preferably by hand grinder down to the bare metal then use an acetylene oxygen brazing tip to property heat the bolt, let cool then remove...on a large item I use the cutting torch...sounds like you're creating more work than repairing...
 
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Elbrus
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PostPosted: Tue Jan 14, 2014 6:08 pm    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I am not really recommending this as a fix but when I had a bad screw hole in my JD A I could not seem to repair it. Not wanting to go with a screw missing I was at a loss to fix it. My desire to fill the hole with braze and re-tap kept failing because the braze did not bond well to cast. So I ended up electroplating the hole with copper by filling the hole with some acid and suspended a copper wire with a small charge. After a few hours I had built up a small copper coating that I believe helped the braze adhere well enough that I could drill and tap the new hole. I firmly believed the copper helped. I was able to apply the same torque to that screw and its still holding.
I had tried this on a spare piece of cast iron I had first and then repeated the process. So I guess I can say I did it twice.
 
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forty40
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PostPosted: Tue Jan 14, 2014 6:24 pm    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Pictured are the radiator components from a later B which had 9 broken off studs or bolts. First all the parts were glassbead cleaned. Then using a small oxy/acetylene rosebud torch, each location was heated to a dull orange and the studs turned right out. For the bolts which were broken off flush, welded on a flat washer, then a nut on the washer, heated with the torch and out they came. Someone on this board told me it works better to start turning the nut by tap tap tapping on the wrench with a small hammer instead of just turning it. That method did work better. Also, very important to slow cool in still air after heating. Chased all the threads with a tap, turned out OK. Then, decided to go with an aluminum radiator in my pulling tractor, so these parts are for sale.

 
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Machinery-Man
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PostPosted: Wed Jan 15, 2014 6:41 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

These projects require easy effort. I've found using box end wrenches and tapping back and forth with a small ball pen hammer worked the best or real low air pressure back and forth with a 1/4 or 3/8 impact....aggressiveness will not pay off...here
 
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Bob Watkins
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PostPosted: Wed Jan 15, 2014 6:43 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I appreciate all your help and ideas. However, I have 2 drill bits broke off in the bolt holes which no one addressed. How do I get broken bits out of a hole? they are tight, I cannot reach in a 5/16 hole with needle nose, nor can I weld anything to them, nor can I drill them out.

The only other problem at this point is the Gland Pack Nut for the drain pipe. I have heated it so much I believe I welded it to the threads and have broken it off so I cannot weld to it. I am going to try to drill it today with a 3/4" bit. I am sure this will destroy any threads left. Is there a tap this big? Is there an oversized Gland Pack Nut?
 
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Bob Watkins, Ohio
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PostPosted: Wed Jan 15, 2014 7:17 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I would be interested in the radiator top shown in the picture. Did you get the drain Gland Pack Nut removed? How much?

I also would like more information about the Aluminum Radiator? Does it have the holes for the hood/sheet metal bolts? Where would I find one? How much are they?

Thanks, Bob
 
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Machinery-Man
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PostPosted: Wed Jan 15, 2014 7:49 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Do you have an acetylene/ oxy outfit? As previously stated you're up the creek without one.
 
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Wind63
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PostPosted: Wed Jan 15, 2014 9:02 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Probably too late as you have broken them off already, but I have read of an interesting home made mixture of 50% ATF and 50% acetone that is supposed to be the best at loosening rusty parts. I have not tried it yet, but intend to this spring for a couple of projects. If you go to AgTalk.com, in the Machinery Talk forum, just search for Hagen's Brew, everone who has tried says it works.
 
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Mike Aylward
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PostPosted: Wed Jan 15, 2014 10:03 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Bob, on the gland nut try heating it and then get an ice cube and put on it (good idea to wear welder gloves). The fast shrinkage will usually loosen them right up. Sometimes it's necessary to do it twice but I've never had it fail me on bolts and such. Mike
 
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41B-boy
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PostPosted: Wed Jan 15, 2014 10:39 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

I tried 50/50% acetone and ATF to free up a badly stuck cylinder. I was genuinely amazed.
FWIW.

Bob
 
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Bob Watkins, Ohio
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PostPosted: Wed Jan 15, 2014 10:51 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

Thanks!
 
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Bob Watkins, Ohio
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PostPosted: Wed Jan 15, 2014 10:55 am    Post subject: Re: 1947 John Deere B Project (radiator) Reply to specific post Reply with quote

No. I am using a solder torch with MAP gas which is hotter than propane and did the trick on all the other bolts.
Thanks,
Bob
 
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