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Antique Steel Wheel Tractors - Old Iron Lugs and Cleats Photos and information about antique steel wheeled farm tractors. This is where to find the heaviest of Old Iron tractors.

Antique Steel Wheel Tractors - Old Iron Lugs and Cleats

Twin City 40


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  #121  
Old 01-10-2017, 11:57:29 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

That's one impressive set of fenders!
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  #122  
Old 01-11-2017, 01:20:56 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

Here is a full length canopy on an early 40 and the only picture of one I've come across so far. I don't know if being an export tractor made a difference on the length.
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  #123  
Old 01-24-2017, 09:23:27 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

After we fit the fenders and canopy pieces we finished the steering.

Pic 1...Newly cast steering wheel.

Pic 2...The view of the steering shaft. In front is an old operating room light.

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  #124  
Old 01-24-2017, 09:32:56 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Pic 1...Machining the steering worm. It was then broached to fit to the new shaft.

Pic 2...The worm matched to the new sector.

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  #125  
Old 01-31-2017, 10:38:06 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

We knew the radiator would be a challenge. These old tube type radiators were inefficient and had to be a costly part of the manufacturing process for all of the early prairie tractors.

The very early 40's had what you could call a keyhole style radiator that was quickly replaced with a simpler round style. These were very similar although a bit different dimensionally from the 30-60 Aultman Taylor round radiators.

Pic 1...The early style.

Pic 2...The later style.

Pic 3...An early style survivor. Good for measurements but not much more.

Pic 4...A couple later style radiators we picked up on various trips to Biewer's. Again just patterns and informational but not useable


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  #126  
Old 01-31-2017, 10:46:09 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

After talking with several accomplished restorers and reading the SmokStak postings of Allan Severson and the Flatmoe's, we put a basic plan together. Given that this was meant to be an early style tractor, we committed to using the keyhole style.

Another restorer doing similar projects made a CAD drawing of the end plates and had them formed in the early style.

Pic 1...The shape and construction of a later style radiator. They had brass 23ga tubing flanged and the soldered at the ends with a soldered seam down the length of each tube.

Pic 2...The new end plates

Pic 3...The new tubing to be used.

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  #127  
Old 01-31-2017, 10:50:23 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

In process in the sheet metal shop.

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  #128  
Old 01-31-2017, 11:49:34 PM
Bruce Flatmoe Bruce Flatmoe is offline
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Default Re: Twin City 40

Your radiator is looking very nice! A memorable experience, isn't it!
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  #129  
Old 02-01-2017, 11:21:39 AM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

Hi Mike. Apparently the earliest of the early 40's were not fitted with a fan shroud as depicted here. I take for granted the sheet metal cover hanging on the upper water pipe is there to enhance the air flow? I wonder if this was an "in field fix" or installed from the factory.
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  #130  
Old 02-01-2017, 09:24:15 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Bruce...Yeah, the radiator has been a challenge to say the least. Glad to have that part done.

---------- Post added at 08:24:15 PM ---------- Previous post was at 08:22:23 PM ----------

Mark...that is a very interesting picture. I think it is one of the prototype tractors. That is a picture I haven't seen prior. Several differences are apparent in the picture including different steering, front axle, radiator, and fan assembly for the radiator.

Thanks for posting it.
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  #131  
Old 02-01-2017, 09:25:34 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

These are taken after the wrapper was placed and riveted.

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  #132  
Old 02-01-2017, 09:28:18 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

We initially tack welded the tubes in place, then later welded them fully and pressure tested them.

This is the radiator and the new fan in the shop awaiting their turn in the assembly process.

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  #133  
Old 02-01-2017, 11:19:32 PM
Brasherman Brasherman is offline
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Default Re: Twin City 40

Looks awesome!
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  #134  
Old 02-02-2017, 02:26:35 AM
Mike McKnight Mike McKnight is offline
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Cool Re: Twin City 40

Thanks so much for sharing this awesome project with the rest of us! Growing up, there were two collector/restorers that I was blessed to spend time with and I really admired their ability to restore what a lot of people would call hopeless basket cases, and they were a big inspiration for me to try to buy and tackle some of the projects I have.

Folks like you and Wendell, and my two inspirations growing up are my heroes! Keep up the great work, and keep giving me inspiration to finish mine.

Thanks,
Mike M
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  #135  
Old 02-02-2017, 09:53:47 AM
Bruce Flatmoe Bruce Flatmoe is offline
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Default Re: Twin City 40

I would agree that the picture in post #129 is possibly one of the prototypes. A few years ago I went to the Minnesota Historical Center photo arhives to get a picture for another collector of one of the Twin City prototypes with the pedestal front end. There is an early prototype being put together. At the time, it seems like I was told that TC built 3 or 5 of these.....someone that knows can certainly chime in.
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  #136  
Old 02-02-2017, 03:35:24 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

This photo came from a Twin City advertising brochure. This picture and the one previous are the only two I have come across so far that depict the very first design of the 40's. Once again the little tin roof over the fan is shown.

Maybe the same tractor at a later date?

Picture quality and good resolution were lacking here. I darkened up the last picture so the script could be read.
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  #137  
Old 02-02-2017, 07:03:02 PM
Tony Thompson Tony Thompson is offline
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Default Re: Twin City 40

Quote:
Originally Posted by Bruce Flatmoe View Post
I would agree that the picture in post #129 is possibly one of the prototypes.
it seems like I was told that TC built 3 or 5 of these.....someone that knows can certainly chime in.
The late "Uncle Jerry" had an original of the threshing scene in post #129 on his wall for many years. He let me copy it some time ago and I made several panoramic copies and then cut the tractor out and enlarged it. These two photos look remarkably like the copies I had made

I did not study the heavyweights real hard, but did bring forward enough info from MN History for a page in my website. The site is simplistic and was only intended as a basic informal to help enthusiast's along. As such, there is lots of photos and text that is not there.

During my studies in the archives I saw this info documented by Minneapolis Steel & Machinery...
The 40 was being advertised and built in 1909. McVicker engineering was involved.
The first 40 was said to have had 5 copies made.
It had a 7 X 10 engine, small radiator and a fully enclosed wooden operators cab. It suffered from continual overheating that led to poor performance and was immediately revised with a 7 1/4 X 9 engine, larger radiator and the cab was replaced with a very short open air canopy and metal fenders.
Here are pictures of that first machine.
I hope this helps and I am amazed by the continuing interest in these great old machines. The recent high quality restos showing up here on the Stak by Bruce, Mark, Mike and others will go on to inspire future generations. You are a talented and dedicated group of hobbyist's
Tony
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  #138  
Old 02-02-2017, 08:46:30 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

The transmissions on these tractors changed over time. The early production tractors had expanding shoe clutches for both the belt pulley and the transmission. Later these were changed to a contracting belt form with a flange on back of the flywheel and a belt being tightened around it to transfer power to the transmission shaft.

A couple of the early style expanding shoe clutch 40's still exist, but getting the pieces to use as patterns would have required a major tear-down of one of the transmissions.

We had available the shoes from an early model belt pulley assembly, as well as the carrier and the throw-out bearing. In studying these, it appeared that they would work for the transmission clutch. These were all used to cast new parts. Core boxes were made for the shoes as they were set up to capture the wooden clutch pads. The shifter ring was cast out of bronze.

Of course all of the above work involved collectors from across the country without whose help we would have been out of luck. The majority of the casting was done at Tomahawk Foundry in Rice Lake, WI where Al and his crew do consistently great work.

Pic 1...Our engine flywheel. Note that the inside of the ring is not flat but rather peaked. This will come into play later.

Pic 2...Our throw-out collars.

Pic 3...The shoe carriers.

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  #139  
Old 02-02-2017, 08:49:31 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Pic 1...The finished collars with the rings in place. It is amazing how much time you can spend on machining one small piece. Next thing you know you have 2 days of shop time in one!

Pic 2...The two copies. One set machined, one set waiting

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  #140  
Old 02-02-2017, 08:56:15 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Everything came together as hoped. The radiuses on the shoes were a perfect fit and they fit the carrier perfectly.

Pics 1 and 2...The pieces in place. New turnbuckles were made for several projects by another collector and look great.

Pic 3...The new shift fork in place. Reach rod bent and threaded to fit.


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