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Antique Tractors - Old Iron Lugs, Cleats and Tracks

Gas Traction Big 4 from Blomgren Estate


We are currently working on the Big 4 chassis that was purchased from the Morris Blomgren estate....

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  #61  
Old 11-11-2010, 11:00 AM
Brasherman Brasherman is offline
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Default Re: Gas Traction Big 4 from Blomgren estate

That's pretty awesome! LOL at John Deere remark!
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  #62  
Old 11-23-2010, 04:53 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren estate

On November 19, 2010 I made a trip to the foundry in Rice Lake, Wisconsin to pick up various parts for the Big 4 tractor. In this picture are some of those parts: steering chain winder clamps, starting crank, two halves of the water pump, governor mount, governor adjuster, spark plug tube support and clamps, clevises, throttle casting, spark advance casting and lever, crankguard/step.
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Big 4 parts.jpg  
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  #63  
Old 11-29-2010, 01:04 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren estate

Over the past weekend I worked on a set of pistons for a Big 4 engine. I have all the lathe work done and still have to put the wrist pin hole in and machine the inside bosses.
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2010_1127pistons0053_picnik.jpg   2010_1129misc0070_picnik.jpg   2010_1129misc0075_picnik.jpg   2010_1129misc0077_picnik.jpg  
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  #64  
Old 11-30-2010, 05:05 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren estate

Today I worked on the rubbing rolls, bracket and pins for the steering stops for the Big 4 tractor.
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2010_1130steeringstoprollers0078_picnik.jpg   2010_1130steeringstoprollers0080_picnik.jpg   2010_1130steeringstoprollers0082_picnik.jpg  
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  #65  
Old 12-06-2010, 09:20 AM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren estate

This past weekend we worked on the master pinions that Morris had bought many years ago. We built the teeth up and remachined them for the purpose of recasting new ones.
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gear.jpg   gears.jpg  
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  #66  
Old 12-16-2010, 11:54 AM
Allan Severson Allan Severson is offline
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Photo Re: Gas Traction Big 4 from Blomgren Estate

Last Saturday we picked up the aluminum piston castings at NRB Foundry in St. Charles, MN. The attached picture shows the aluminum pistons. Also attached is a picture of the finished cast pistons, bearing caps, and wrist pins ready for Bruce Flatmoe to pick up for his Big 4.
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2010_1212pistons0011.jpg   2010_1216pistons0025_picnik.jpg  
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  #67  
Old 12-16-2010, 02:43 PM
A Martinson A Martinson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Just out of curiosity, why did you decide to go with aluminum pistons?
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  #68  
Old 12-16-2010, 03:12 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

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Originally Posted by A Martinson View Post
Just out of curiosity, why did you decide to go with aluminum pistons?
I was hoping it would run a little smoother and be easier to balance.
We melted down some old pistons to save on material cost.
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  #69  
Old 12-22-2010, 04:27 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

We have started machining the flywheels on the vertical lathe this week. Attached are pictures of the cast flywheel and the lathe it is being turned down on.
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2010_1222flywheels0025.jpg   2010_1222flywheels0035.jpg   2010_1222flywheels0038_picnik.jpg   2010_1222flywheels0063_picnik.jpg  
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  #70  
Old 12-23-2010, 02:07 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

We are just finishing one of the four flywheels we are working on for the Big 4 tractors. Here are pictures of the finished one.
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2010_1223flywheel0014_picnik.jpg   2010_1223flywheel0016_picnik.jpg   2010_1223flywheel0019_picnik.jpg  
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  #71  
Old 12-23-2010, 03:53 PM
Titan1020 Titan1020 is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Are you going to try and balance the flywheels before putting them on the crankshaft or maybe after and balance the assembly? Or do you think it won't be an issue?
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  #72  
Old 12-23-2010, 03:56 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

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Originally Posted by Titan1020 View Post
Are you going to try and balance the flywheels before putting them on the crankshaft or maybe after and balance the assembly? Or do you think it won't be an issue?
My plan is to balance them as an assembly. There is a place in Owatonna Mn. (Midwest Balancing) that should be able to handle this. It probably wouldn't need to be done, but I want to be sure it is right.
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  #73  
Old 12-23-2010, 06:21 PM
Titan1020 Titan1020 is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Quote:
Originally Posted by Allan Severson View Post
I want to be sure it is right.
That makes a lot of sense to me to do it as an assembly. It sure looks like you're doing everything else right with this engine. Very impressed with your work!
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  #74  
Old 12-23-2010, 07:19 PM
Bubbles Bubbles is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Hi Allan,

How many hours (rough estimate) do you think you will have into a complete motor?

Great photos of the actual machining and finished parts!

Bubbles
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  #75  
Old 12-23-2010, 07:59 PM
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OTTO-Sawyer OTTO-Sawyer is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Looks like I have a little 'catch up' reading to do.... as I kind of lost track of this thread for a while.

Impressive work.

Thanks for providing the pictures and information.
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  #76  
Old 12-24-2010, 07:32 AM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

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Originally Posted by Bubbles View Post
Hi Allan,

How many hours (rough estimate) do you think you will have into a complete motor?

Great photos of the actual machining and finished parts!

Bubbles
As far as hours, I don't even want to think about it. Just doing one step at a time. I tell everybody it will be done by the 4th of July, but i'm not giving a year.
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  #77  
Old 12-26-2010, 12:10 PM
Allan Severson Allan Severson is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

We just got a new dealership sign made for our Big 4. It is double sided. It seems like we could be a dealership with all the various parts in our shop.
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Big 4 sign 1_picnik.jpg   Big 4 sign 2_picnik.jpg  
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  #78  
Old 12-26-2010, 02:21 PM
Bubbles Bubbles is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

Top notch again Allan!!!
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Old 12-26-2010, 03:22 PM
oldjdinterest oldjdinterest is offline
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Default Re: Gas Traction Big 4 from Blomgren Estate

What a hell of a project! There are not many people who buy a tractor without an engine who think, O the engine I can make by myself.
When you have the right tools, you can make everything.

Keep going with this fine project and the tractor will be rescued for the future.

Gerrit
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Old 12-26-2010, 05:23 PM
Mike McKnight Mike McKnight is offline
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Thumbs up Re: Gas Traction Big 4 from Blomgren Estate

Quote:
Originally Posted by Allan Severson View Post
It seems like we could be a dealership with all the various parts in our shop.
Dealership Hell, I think you're starting up another Big 4 factory!

Sign looks great, work on the engines looks great! I'm just constantly amazed at the scope of work you're doing, and the professionalism of it. Keep up the good work!

Mike
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