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Discussion Starter · #1 ·
OK

Here is a wild hair idea:

I have a '70's formerly 1618 long hood pk (dual trans, hyd 3 pt) that I purchased without an engine. It came with wide ag/bar tires on 15" rims.

I am contemplating putting a Wisconsin VF4 engine in it(V4 25hp).
My goal is to make a Hot Rod themed tractor that would still be able to be used to pull stuff with.

I don't need this tractor for normal tractor stuff as I have other economy/pk's that are stock.

I know from looking at the spec sheets that the mounting points/centerlines and crankshaft dia/length will require attentions. The weight of the VF4 is approx 350#, which compared to the Kohler K321 is probably 200# ++ more.

I do have a Kohler K321 that I could/might rebuild for this project.
The Wisconson is on our local C'list know and I am just thinking outloud.

chuckbob
 

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If you were closer to me I would consider buying that carcass for the dual tranny set up so I could put that in my FEL tractor.
 

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its a cool idea, if you do it you have to make a tread following the build. it would definitely be awesome for shows, but then again... all pks are. lol
 

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You might want to research the weight on a 321. It's nowhere near 200#. The Wisconsin is probably 3X the weight of the Kohler. You may want to consider power steering with that big piece of iron sitting up front.

It will be a nice project, though.
 

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I don't think the engine weight is going to be a problem.I have a lot more weight hanging on the front of my tractor and I have no problem steering it.The FEL tractors can have considerably more weight than the extra weight of the engine.

There was a fellow on another thread just this year installing a Wisconsin in his tractor but have not heard back of any results.I think he was using the 37 HP model.
 

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Go for it, you won't be dissapointed. I put a 2 cylinder THD on my 1950 economy 15 years ago. It is my most used tractor.
 

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Hi oem7,

How difficult was the 2 cyl thd to install?

thx. chuckbob
Hi chuckbob,

The conversion was actually very simple although it may not sound that simple by the time I explain it.

First thing to do was to lengthen frame 3” (right behind front axle cross member under front engine bolts. Economy used odd sized tubing so I got that tubing from rear cross member behind rear axle and replaced rear member with 1” x 2”.

Cut drag link and added 3”.

Took clutch – pulley to machine shop, had bore enlarged from 1-1/8” to 1-7/16” for new crankshaft ($40.00 not as bad as I thought).

Made longer 2” angle iron supports to bolt engine to.

Lowered center of tie rod to clear knuckles when hand cranking, 4 or 5 years later found a starter generator and added that.

Had two more pulleys in bell housing so I added hydraulics on one side and air compressor on the other, (sometimes I get carried away).
 

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Discussion Starter · #12 ·
Hi,

Thanks for the reply oem7 and I certainly appreciate the pictures.

Do you remember the size of the raised pilot on the thd?
Kohler and AEN have a 7" dia.
My research into the V4's show a much bigger pilot dia than the 7" and then the bolt circle of the 4 mounting bolts is much larger. This would require machining of the bellhousing-still doeable. I thought the clutch part could be machined to fit the crankshaft. I wondered about the frame/steering mods.
Thanks again.

I will try to go look at the vf4 this weekend and buy/evaluate.

Everyone have a Merry Christmas!

chuckbob
 

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Hi,

Thanks for the reply oem7 and I certainly appreciate the pictures.

Do you remember the size of the raised pilot on the thd?
Kohler and AEN have a 7" dia.
My research into the V4's show a much bigger pilot dia than the 7" and then the bolt circle of the 4 mounting bolts is much larger. This would require machining of the bellhousing-still doeable. I thought the clutch part could be machined to fit the crankshaft. I wondered about the frame/steering mods.
Thanks again.

I will try to go look at the vf4 this weekend and buy/evaluate.

Everyone have a Merry Christmas!

chuckbob

Most of the V4's I have seen have a clutch on them allready with a stub shaft. Might be able to just make a collor to link the engine output, to the trans input.
 

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That sounds more reasonable than using my Wisconsin 4...the turrning diameter might be getting out of reason with it.
Now that's an engine. I might even cut my drive shaft tube 8" for that.
 

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I believe that is a Wisconsin AC4 or AM4 (can't read tag, and won't know until I can measure the bore), its a WWII era over head valve design. Hope to get it running sometime when I get around to it. It has a couple of broken rocker arms. I have the replacements but need to take the heads off & clean the valve stems before I try and start it. Just posted it for fun.
 

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Is there enough "meat" in the economy flywheel to bore it to match the v4 shaft? I think the v4 shafts are around 1-3/4 to 2 inches
 
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