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Allis 720 Diesel Repower


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#1 olcowhand ONLINE  

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Posted May 14, 2016 - 06:10 PM

May be a while before I actually begin work, but preliminary measurements seem to show that the 20hp Perkins 3 cylinder diesel I have (bought from David, member "TheFarm 2004") will shoehorn into my Allis 620 without major frame modifications.  I also think a Honda Civic radiator will fit inside the hood well.  Won't truly have any definite answers until I have time to pull the Onan engine and lower the diesel down in there to check clearances and alignments.

  I'm just now finding myself wanting to get into another project after a couple or 3 years of life's problems stifling my ambitions.  It feels good just to start thinking of such a project, so hoping once I actually get started that I find myself having a good time again tinkering.  

  Only kicker to this project is that I sold the 3pt lift off it a few years ago, but at least I kept the rear PTO system completely intact instead of selling that off it as well.  If I get this project going, then I'll have to build a new 3pt system for it.

 

Pics of the 720.  She's backed into a shed & filthy at the moment.

Allis 720.jpg


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#2 KennyP ONLINE  

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Posted May 14, 2016 - 06:15 PM

All right! This should be fun to watch! Wish I was close enough to grab that Onan!


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#3 Auburn David OFFLINE  

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Posted May 14, 2016 - 06:29 PM

Wish I had the room on Frankin Tractor..I have couple of nice D1105s .


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#4 olcowhand ONLINE  

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Posted May 14, 2016 - 07:03 PM

I also have all the components needed to fab power steering to this tractor.  About all  I have to buy is paint supplies, a radiator & hoses, and some steel for he 3pt build, but the main component needed will be time.


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#5 Cvans ONLINE  

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Posted May 14, 2016 - 07:18 PM

Nice to hear that your starting to feel yourself again. Looking forward to seeing the progress.  :D


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#6 Cat385B ONLINE  

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Posted May 14, 2016 - 07:28 PM

If you need any measurements for the 3 point, just yell. I can get them off the 4041.
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#7 SupplySergeant ONLINE  

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Posted May 14, 2016 - 07:34 PM

:watch_over_fence:

 

Looks like another great Perkins Tractor Shop project!



#8 Bmerf ONLINE  

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Posted May 14, 2016 - 08:10 PM

I'll be :watch_over_fence:


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#9 Texas Deere and Horse OFFLINE  

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Posted May 14, 2016 - 09:55 PM

Glad to see you getting back into it. This will be quite the GT when you get it done with the Hydro and 3 sp rear end. I will try to get you all the 3pt measurements off my 4041 with photos so you can build one for your tractor.


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#10 olcowhand ONLINE  

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Posted May 15, 2016 - 01:08 PM

The Onan starter would kick in, but not crank the engine.  So Teresa pulled me & the 720 out & up to the hydrant for a washing off of all the dusty grime.  Then we rolled it down into the old shop.  I got the Onan pulled & brought the diesel down.

 

P_20160515_1239041.jpg P_20160515_1304091.jpg P_20160515_1332101.jpg

 

Finally feels good to start a new project.  I think just maybe I've finally mentally "reset".


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#11 olcowhand ONLINE  

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Posted May 15, 2016 - 01:12 PM

And it does now appear I may need to raise the dash tower and hood a couple inches.  Length-wise things look good, but I may have a time finding a radiator to fit.  The Honda Civic radiator I put in the HD-12 is 1 1/2" too wide, and about the narrowest radiator I've come across.  Likely cost a fortune to have one custom built.


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#12 Auburn David OFFLINE  

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Posted May 15, 2016 - 01:15 PM

what about something like this?


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#13 mrmr56 OFFLINE  

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Posted May 15, 2016 - 03:18 PM

Ebay sellers have a full aluminum radiator for an early model mini cooper. I have used 2 of them on diesel conversions and they work and cool fine. They are about 11 inches wide and 15 inches tall and about 1 1/2 inches thick. I think I paid $55.00 with free shipping.


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#14 KennyP ONLINE  

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Posted May 15, 2016 - 03:18 PM

And it does now appear I may need to raise the dash tower and hood a couple inches.  Length-wise things look good, but I may have a time finding a radiator to fit.  The Honda Civic radiator I put in the HD-12 is 1 1/2" too wide, and about the narrowest radiator I've come across.  Likely cost a fortune to have one custom built.

How wide can you go? I have a motorcycle radiator that's not too big! It's curved, though.


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#15 IamSherwood OFFLINE  

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Posted May 15, 2016 - 03:33 PM

Nice project Dan.

This should be an awesome machine when done.

Bore into it. :thumbs:


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