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Antique Farm Tractors Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

Antique Farm Tractors

Minneapolis-Moline Prototype 445 Tractor #X-231


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  #61  
Old 03-04-2018, 09:21:09 PM
Mark Schneider Mark Schneider is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Well Squatch...How is "sunny" Kerrick this time of the year? Those are some well thought out improvements on your home brewed boring bar set up! I see several ideas I may be able to put to use on future projects.

Hope your injured eye heals well with no complications.
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Old 03-04-2018, 10:57:23 PM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Thanks Mark, yeah Kerrick was "sunny" a few days ago but now it's waiting for at least another half a foot of snow tonight and tomorrow, possibly more depending on who you listen to. Oh well, it's that time of year. The eye has healed up well, no problems now but thanks for the well wishes.

Feel free to take as many ideas as you'd like - today I really put the boring bar through its paces and it did quite well so I'm satisfied that I've got the bugs out of it now. The rear case is getting a lot of shavings piled up in the bottom of it so I guess that means progress is being made - stay tuned for the next update, hopefully in a few days.
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  #63  
Old 03-11-2018, 08:49:30 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Looking forward to the next update! You probably saw this but just in case you didn't.

https://minneapolis.craigslist.org/h...525530489.html
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  #64  
Old 03-15-2018, 09:55:04 PM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Here's "Part 20" of the ongoing series, I was able to finish the machining on the repaired portion of the rear end and got the belt pulley drive and live power clutch drum meshing very well - they actually ended up fitting together much better than I had hoped for. I really have to compliment the guys that built up that broken out area for us, there were ZERO voids in the material and every bit that I milled out was pure, clean, and solid. I couldn't even tell where their individual passes had been laid onto one another.

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Old 03-17-2018, 11:14:41 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Thanks so much for the detailed explanation and visuals you gave. Lots of ingenuity involved there, thanks for showing us how you did it all. I love seeing someone take the time to save something rather than just saying it's too much work!......not to mention the extra time it took to put together such an excellent video!
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Old 03-25-2018, 10:38:47 PM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Part 21: Repairing damaged drawbar bolt holes in the rear case. There were some really flogged out threads where the right side drawbar bracket had been run loose for a long time, then welded on (horribly), then run loose again. Although the standard HeliCoil inserts I chose to use for this repair are lighter duty than I normally like to use, I think for this trailer queen they will suffice. More details in the video -

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  #67  
Old 04-01-2018, 12:14:43 AM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

OK fellas, I would like to get any opinions you all may have regarding the best course of action to take to attempt another cast iron repair on one of X231's components - the front steering bolster is broken on one end of the power steering rack cylinder bore. The break occurred around the snap ring groove that holds the end plug with the pressure feed line, and all the material outside of that groove is now hanging loose. Here's a video that shows what I'm talking about -

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Old 04-01-2018, 05:58:39 PM
Mark Schneider Mark Schneider is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Looks like the best method would be to build the end of the cylinder up with brass and re-machine the snap ring groove. (Easier said than done!) If the strength of the repaired section looks questionable the end cap could be discreetly pinned from the outside to take the load off the snap ring if necessary.
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Old 04-01-2018, 10:31:50 PM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Thanks Mark, I had already been thinking very seriously about taking that casting down to the same folks that did the rear end repair and seeing if they would want to mess with it. I'm not too worried about the machining part, I think we can figure something out to get that done, it just takes more time than anything.

---------- Post added at 09:31:50 PM ---------- Previous post was at 09:26:08 PM ----------

Got some more work done this past week/weekend - here's "Part 22" where I fully clean and re-seal the interior of X231's rear end now that I'm finished with the repairs on it.

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Old 10-30-2018, 10:50:33 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Well after a long busy summer away from this project I finally had things slow down enough to look at it again. I decided that since I had the rear end case ready to accept parts, I might as well get the transmission housing cleaned and ready too since I will need to have the pinion shaft installed in it to set the ring gear backlash and contact. So now with the transmission housing done I can start some reassembly.

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Old 11-04-2018, 10:32:53 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Looking good! Glad to see you're back to posting again, i always enjoy your in depth videos!
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Old 11-13-2018, 11:22:44 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Another video update - I took the time to do another component comparison video of all of the prototype versus production castings for the powertrain of X231. At a few points I had to do some theorizing about what appears to be abandoned mounting bosses or shaft bores that may at one time have been used for completely different components than what ended up being in this tractor.

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Old 11-30-2018, 10:28:42 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

OK guys, another update. Ended up having to do some more "book keeping" instead of real assembly, but this installment outlines my plan for dealing with those horribly damaged rear end and transmission components, and how I hope to proceed.

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Old 12-09-2018, 11:28:37 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Part 26: Assembling the lower gearset onto the countershaft/pinion and fitting it into the transmission housing -



---------- Post added at 09:28:37 PM ---------- Previous post was at 09:26:27 PM ----------

Part 27: Assembling and installing the differential into the rear case -

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Old 12-16-2018, 12:25:03 AM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Part 28 - The title says it all!

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Old 12-16-2018, 11:24:25 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Part 29: Thought I would've rolled right in to putting the axles and bull gears into X231, but as usual she threw me a curve ball again!

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Old 12-17-2018, 10:01:09 AM
Mark Schneider Mark Schneider is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Hey Squatch...Great video!

My thoughts here...It would seem very unlikely that any 10A parts would have been used on X231 in the initial assembly. The 10A axle and hubs are probably "one-off" replacement parts supplied by Minneapolis Moline per a dealer request long after the 445 production had commenced.

The load face deterioration on the bull gear teeth was pretty standard fare on older tractors with high drawbar hours. When I worked for IH the bull gears got swapped side to side so that the torque would be on the unworn side of the tooth. There was no real load on the teeth in reverse so this was considered an acceptable repair back in the day. This was easy to do on the Farmalls as they all used straight axle splines.

So it would appear that MM took a 445 axle and hub "blanks" and created replacement parts for X231's now obsolete design. In essence you would be doing about the same thing by modifing the 445 axles to fit. I'd say chuck it up and get after it!

Last edited by Mark Schneider; 12-17-2018 at 11:07:51 AM.
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Old 12-17-2018, 11:00:42 PM
Squatch253 Squatch253 is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Thanks Mark, I hadn't thought of it like that but you make perfect sense. In a perfect world I would be able to reuse ALL of the pieces that were on X231 when we got it, but we all know we don't live in a perfect world. In fact, if they hadn't have killed the poor tractor back in the mid 1980's we likely never would've got it at all, and it likely would've met the melting pot like the rest of the prototypes that were on that old farm.
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Old 12-17-2018, 11:35:10 PM
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

Chuck up your lathe and get to work. I am not sure about your custom keys but good luck.
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Old 12-17-2018, 11:57:11 PM
Mark Schneider Mark Schneider is offline
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Default Re: Minneapolis-Moline Prototype 445 Tractor #X-231

One thing is for sure...the folks that owned this tractor certainly had it within their ability to run a set of rear hubs loose and break a rear axle!

As the rear hubs that were on X231 were really only stock 445 hubs that were broached with an odd round keyway and not the original 10X parts I would probably just add them to the bull gear and axle pile and just use the 445 hubs that match the axles.
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