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The Viking Project


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#1 jdcrawler OFFLINE  

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Posted September 15, 2014 - 01:26 PM

" The Viking project " ... sort of sounds like a sci-fi movie, doesn't it ?

For those that haven't come across this tractor yet, it is an old two wheel walk behind tractor that someone had made into a four wheel rider.
It was going to the junk yard when a good friend of mine salvaged it and he then sold it to me.

This is what it looked like when I got it.

2-Vikingtractor_zpsd086a2ae.jpg


This has the same engine and drive train as the Standard Twin two wheel garden tractors.
There seams to be a lot of these tractors still around so this one is not a "rare" tractor.
Over the years several of them have been made into a ride on tractor and some of the conversions were done really well.
However, the construction and dependability of this conversion is questionable.

After doing some researching, I feel that the cost of locating and buying the parts needed to restore this back to a two wheel tractor would most likely cost more than what the finished tractor would be worth.
I have the tracks and chassis for a small crawler so I'm going to build a crawler with those parts and what's left of this Viking tractor.

The steering wheel is broken and the rack-an-pinion steering unit is very worn out.
The steering wheel will rotate almost half a turn before the steering arm starts to move so I took the whole steering assembly off.

Here is what is left.

40_zpscab33afc.jpg

41_zpsada1c90a.jpg


The gas tank was bad and that has already been replaced.

42_zpsec3db588.jpg


At 67 years old, I am not a fan of crank start engines.
My dad use to say " the only thing a crank is good for is building a strong arm and a ripe vocabulary ".

So this engine is going to be converted over to an electric start system.
My biggest problem is that my big saw, drill press, mill, lathe and welders are in storage.
The power tools that I have here in the shop are a 3/8 electric drill, a sawzall and a hand held electric grinder.


The first thing to do is to remove the front grille and flywheel air shroud so I can get to the crank hub.

SAM_0074_zps53aa0f05.jpg


The hole in the crank hub needs to be enlarged just a little so a 5/8 diameter shaft will fit into it.
Luckily, I have a small lathe in the basement that I can do that on.
This crank hub is about the maximum diameter that this little lathe will hold.

SAM_0076_zpsbadb7903.jpg


The hub is bored out so a 5/8 bolt fits tightly thru it.

SAM_0077_zpsa5f8d98d.jpg


The bolt is cut to the correct length and fit into the crank hub.
Then a 3/16 diameter hole is drill thru the hub and the bolt and a split pin is hammered into the hole.
This locks the bolt in place so it will not turn in the hub.

SAM_0078_zps45c21bbb.jpg


The pulley that I have has a 3/4 diameter bore so I put a bushing in it to bring the bore down to 5/8 diameter.
The pulley hub is split on one side and a 1/4 inch bolt goes thru to clamp it tight on a shaft.

SAM_0079_zpsfeccc66a.jpg


A notch had to be filed on the bolt for clearance for the 1/4 inch clamping bolt in the pulley.

SAM_0080_zps95299cb7.jpg


The crank hub is mounted back onto the front of the flywheel and the pulley is set in place.
I have to put the front of the flywheel air shroud back on before the pulley can be tightened down.
Once the air shroud is back on, the pulley will be clamped tight onto the shaft and the 5/8 nut will be tightened down to hold the pulley tight to the front of the hub.

SAM_0081_zpsf9cd5856.jpg


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#2 boyscout862 OFFLINE  

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Posted September 15, 2014 - 01:34 PM

Very nice explanation. Good Luck, Rick
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#3 superspeedex OFFLINE  

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Posted September 15, 2014 - 02:53 PM

This will be a neat project


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#4 wilberj ONLINE  

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Posted September 15, 2014 - 03:51 PM

Happy to see your already at work makeing something out of her Ray!


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#5 Brando OFFLINE  

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Posted September 15, 2014 - 08:18 PM

That's going to be a nice project.
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#6 wilberj ONLINE  

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Posted September 15, 2014 - 08:30 PM

Ray do you have a name for this thing picked out yet?


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#7 Sawdust OFFLINE  

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Posted September 15, 2014 - 08:41 PM

This will be a fun project to watch. Your doing a good job on your tutorial. Along with a name do you have a color picked out yet.
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#8 KennyP ONLINE  

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Posted September 16, 2014 - 06:23 AM

All right! Ray's building again! I'm lurking!


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#9 jdcrawler OFFLINE  

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Posted September 16, 2014 - 08:54 AM

Ray do you have a name for this thing picked out yet?

 

 

 Along with a name do you have a color picked out yet.

 

The two wheel tractor is a Viking so this will be a Viking crawler conversion.

 

I'm thinking of painting this the colors of the Minneapolis Moline tractors.

The engine and chassis will be the golden yellow and the tracks will be red.


Edited by jdcrawler, September 16, 2014 - 08:54 AM.

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#10 LilysDad ONLINE  

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Posted September 16, 2014 - 10:45 AM

Nice! I like those semi gloss industrial colors. They look more antique. Is this going to have a starter/gen.?


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#11 jdcrawler OFFLINE  

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Posted September 16, 2014 - 01:55 PM

Yes, I'm putting a starter/generator on it.


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#12 KennyP ONLINE  

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Posted September 16, 2014 - 06:09 PM

This sounds promising! Get after it, Ray!


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#13 jdcrawler OFFLINE  

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Posted September 18, 2014 - 08:52 AM

After thinking about this for awhile, I made a slight engineering change to the hub to increase it's strength.
You can see in this photo that there is a larger hole in the outer part of the hub.
This area has the spiral cast into it that the hand crank mates with to turn the engine over.
When the engine starts, this spiral then pushes the hand crank out of the hub.
This spiral area is about 1 inch deep and then the hub closed down to about a 9/16 diameter  that is about a 1/2 inch deep before it opens back up on the back side of the hub.

SAM_0076_zpsbadb7903.jpg


The 9/16 diameter hole is the area that I machined out to fit the 5/8 bolt into so the bolt is only actually supported by 1/2 inch of the hub.  
I was thinking this would be enough support because the nut and lock washer on the bolt tightens the pulley against the front of the hub.

Over time that may still start to work loose because that 1/2 inch of support is 1 inch back in the hub.
So I filled the outer hole in the hub with JB Weld.
Then I set the flat washer over the bolt and clamped it down tight to the face of the hub so that the JB Weld squeezed out around the sides of the washer and from between the hole in the washer and the bolt.

This now makes it so the bolt is supported the full 1-1/2 inch length of the hub and the pulley still gets tightened down to the face of the hub.
I also used grade-8 bolts to mount the hub to the flywheel.

SAM_0083_zps7dfba0af.jpg


There if about 1-1/4 inch space between the flywheel air shield and the pulley.

SAM_0088_zpsc7a87818.jpg


The starter/generator will mount on the right side ( as viewed from the front ) of the engine under the carburetor.  

SAM_0086_zps212019f8.jpg


I got a cast iron starter/generator mounting bracket that I think will work good and looks like it fits in with the design of the engine.

SAM_0084_zpsdee2b647.jpg


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#14 KennyP ONLINE  

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Posted September 18, 2014 - 09:35 AM

Sounds like a good idea to me!


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#15 LilysDad ONLINE  

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Posted September 18, 2014 - 10:34 AM

Maybe we need a contest to name the tractor. Unless Mrs. Crawler wants the honors.


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