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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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  #61  
Old 07-14-2016, 09:45:36 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

We finished the axle today. Had to drill a pin for the left hand wheel where it is attached to the hub. On the right it floats and is covered by a dog of sorts.

Pic 1...The left hub in place.

Pic 2...The right hub in place. You can see holes in the middle of the hub. It appears these were a crude way to have a locking differential. The left hub doesn't have them. We would surmise a pin of some sort was inserted. You can see where part of the dog is beat up a bit from use. We suspect whatever was inserted into the hole on the hub rubbed this area on the dog.


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  #62  
Old 07-17-2016, 05:58:15 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

Mike...Here is an June 1913 ad extolling some of the virtues of the steering on the early 40's. I find the statement "automatic knuckle joints" to be particularly entertaining. When steering early tractors of this size several words do come to mind but not "automatic".

To satisfy my own curiosity I've been searching early ads to see when the transition from the early models happened. This ad marks the latest I can find for the early round spoke full fendered design.
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  #63  
Old 07-19-2016, 12:40:58 PM
Russ Hamm Russ Hamm is offline
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Default Re: Twin City 40

"A worker that never goes home."
Sometimes i feel that way.
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  #64  
Old 08-21-2016, 05:02:51 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

The next ad is August 1913 which shows the expanded Twin City lineup and the transition away from the earlier models. The "60" and the "15" have been added and all models now are outfitted with flat spoke rear wheels. Another easy to note design change was the move from the full width fenders to the those with the tapered fronts. It would appear that there would have been limited production of the early style 40's in 1913 and advertising up to this point was an effort to move old stock. The assembly floor was probably preoccupied with the new model set up in early '13.

The exhaust outlets on the early "60" tractors may have been instrumental in coining the term "6 popper"!
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  #65  
Old 09-10-2016, 05:29:09 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

w that summer is over and our pilgrimage to Rollag is behind us, I'll get back to updates.

Next up is the engine. The original tractor engines are either in tractors or are gone. With this, the next best thing is to use a power unit engine. These, while not original, are in a little better supply, and very similar.

Twin City power units came in different configurations. Style A was followed by B, and C with evolution in each. They also came in either rotation. Tractors were counter-clockwise from the front.

My engine is a Type C with a 7 1/4" bore and 9" stroke.

When we got it home we tore it apart as we had no idea it's condition other than that it was loose. In many ways we were pleasantly surprised, as the engine had little evidence of wear.

Pictures of when we tore it down. We removed everything, but left the jugs on the crank case.

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  #66  
Old 09-10-2016, 05:31:27 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

The wrist pins were nice and tight without play. The cylinders were simply honed to get any glazing off. They were still nice and round.

Pic 1...The crank

Pic 2...A piston assembly

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  #67  
Old 09-10-2016, 09:56:24 PM
Jeff Blaney Jeff Blaney is offline
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Default Re: Twin City 40

So Mike, will you have to make any major modifications to this later model engine to have it work in your tractor application?

It is my understanding that Twin City power units were kept in the Minneapolis Moline product list well into the 1940's. They were no doubt updated and re-engineered some what. A testament to MSM engineering in any case!
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  #68  
Old 09-11-2016, 12:04:48 AM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

Mike...a couple of questions on the engine. What model designation was used for this engine and in what time frame was this one built? Also were the styles A,B, and C all overhead valve design?
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  #69  
Old 09-11-2016, 12:49:14 AM
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Craig A Craig A is offline
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Default Re: Twin City 40

Quote:
Originally Posted by Mike Harmeling View Post
The wrist pins were nice and tight without play. The cylinders were simply honed to get any glazing off. They were still nice and round.
Did the pistons have oil control rings or did you make the modification?
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  #70  
Old 09-12-2016, 05:30:06 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Jeff...We have had to make some adjustments, though not as much as you would expect. I'll put some pictures up to show them.

Mark...I have been fortunate enough to track down parts list/instruction books for the A&B and then the C engines. The A appears to be the L head. The B appears to be the first with the overhead valves. They are open. The C has covered overhead valves. The A had a drip oiler, where the B and C had forced lubrication. Mine is a C.

Craig...The pistons had oil control rings in place.

Mike
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  #71  
Old 09-12-2016, 09:26:24 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

These pictures aren't great, but they are pictures form the manuals.

Pic 1...Type A engine. Came with either 7 1/4 or 7 3/4" bore.

Pic 3...Type B engine. Also appear to have had both bores available.

Pic 4...Schematic from the Type C manual.

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Last edited by Mike Harmeling; 09-12-2016 at 09:37:21 PM.
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  #72  
Old 09-12-2016, 10:40:51 PM
8-16 avery 8-16 avery is offline
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Default Re: Twin City 40

I don't mean to derail the topic, but does anyone happen to have an actual photograph of a twin city 15?
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  #73  
Old 09-12-2016, 11:18:56 PM
Mark Schneider Mark Schneider is offline
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Default Re: Twin City 40

Thanks Mike. It looks like the most obvious visual difference between the Type A and the later ones was the relocation of the intake/exhaust manifolding from the right to the left side of the engine.
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  #74  
Old 09-12-2016, 11:33:07 PM
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Default Re: Twin City 40

B and C are removable head with overhead valves. I have a very late descendent of the C. Can't remember which one. Came out of the oil fields and had a massive downdraft carb and pusher fan radiator. If someone wants to build a tractor I would like it to go to a good home. It's just too late an engine for most folks trying to build a 40. Might be an 8x9.

The first pic is of a headless type.
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  #75  
Old 09-13-2016, 07:14:09 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

I didn't take as many pictures as I should have during the engine rebuild.

We had to pour 2 new rod bearings and 1 main bearing as they had scalloped out. The pieces were in place, but fell out when we took the caps off. The remainder of the bearings looked really good. Took out a few shims here and there and we were in business.

We put in new rings and started buttoning it back up.

Pic 1...The cam shaft back in place. The lobes looked like new.

Pic 2...Crank back in place.

Pic 3...Pistons back in place.

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  #76  
Old 09-14-2016, 04:03:23 PM
Langes Machine Shop Langes Machine Shop is offline
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Default Re: Twin City 40

Mike

It was good to see you at Rollag. Glad to see it is going together that good for you.
Jason
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  #77  
Old 09-14-2016, 05:34:53 PM
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Default Re: Twin City 40

Quote:
Originally Posted by 8-16 avery View Post
I don't mean to derail the topic, but does anyone happen to have an actual photograph of a twin city 15?
http://www.smokstak.com/forum/showth...ight=twin+city

Here is a link from last year that has some pictures.
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  #78  
Old 09-15-2016, 07:52:51 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

Jason...Good to see you, too. Glad you are preserving what seems to be a dying art so the rest of us have options.

Mike
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  #79  
Old 09-15-2016, 07:58:54 PM
Mike Harmeling Mike Harmeling is offline
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Default Re: Twin City 40

This engine has forced lubrication. The Type A was drip feed. The Type B was forced to the crank only. The Type C is forced thoughout the engine. This one had the optional filter assembly as well. It wouldn't be original on tractors, but, as it came on the engine, we decided to use it anyway.

Pic 1...The filter assembly

Pic 2... The center shaft of one of the sides after the felt rings were removed. We used later style cylinder filters instead as they should do a better job and are a lot easier to replace.

Pic 3...The oil pump. The other end of the pump is the governor. The only wear we found in any of the gearing was mild wear in the bevel that turns the pump.

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  #80  
Old 09-17-2016, 09:19:37 PM
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Default Re: Twin City 40

Hi Mike
Mark spotted this picture while looking through my paper collection and thought it would look good in your thread.
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