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New To Me Allis 620


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#16 tiretrx ONLINE  

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Posted January 02, 2012 - 09:12 AM

Love the 620, congrats! By the looks of that starter gear, the bolts had been working themselves free for quite some time.

#17 olcowhand ONLINE  

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Posted January 02, 2012 - 09:18 AM

Daniel,nice looking 620,I would love to get one of those,or a 720.


Skunkhome,welcome to the forum. Glad to have you with us.


Phil aka "Skunkhome" is a longtime friend from another forum. He's one of the good guys & knows a lot of AC/Simplicity info!

#18 olcowhand ONLINE  

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Posted January 02, 2012 - 09:20 AM

Love the 620, congrats! By the looks of that starter gear, the bolts had been working themselves free for quite some time.


Yes, you can't see the rear of the flywheel teeth, but a good 1/3 of that side is worn down, as the gear was only contacting that much, and at a slight angle. I think before I button things up, I'll back the bracket bolts out just enough to get JB Weld into the loose hole area to help prevent movement.

#19 coldone OFFLINE  

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Posted January 02, 2012 - 09:22 AM

Great looking 620. Saw one on CL the other week down here for less than a grand, didnt last long.

#20 olcowhand ONLINE  

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Posted January 02, 2012 - 09:36 AM

Great looking 620. Saw one on CL the other week down here for less than a grand, didnt last long.


Member "tractorgarden" just bought a 620 also. Waiting for him to start a thread about it with pics!

#21 olcowhand ONLINE  

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Posted January 02, 2012 - 10:03 AM

Love the 620, congrats! By the looks of that starter gear, the bolts had been working themselves free for quite some time.


The starter gear may appear worse in the pic than it is. The starter gear has hardly any wear at all. If you look closely, the gear teeth appear slim, but that appears so because of the bevel cut on the leading edge. There is a perfect full mesh when it kicks in now.

#22 tiretrx ONLINE  

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Posted January 02, 2012 - 11:04 AM

The starter gear may appear worse in the pic than it is. The starter gear has hardly any wear at all. If you look closely, the gear teeth appear slim, but that appears so because of the bevel cut on the leading edge. There is a perfect full mesh when it kicks in now.


Glad to hear that :thumbs: As Forrest Gump said "it's one less thing".

#23 Cvans OFFLINE  

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Posted January 02, 2012 - 03:12 PM

:welcome: to the forum Phil. It will sure be nice to have you over here with us.
Daniel is not getting any sleep again. He's got a new love in his life :love:

#24 olcowhand ONLINE  

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Posted January 02, 2012 - 08:16 PM

:welcome: to the forum Phil. It will sure be nice to have you over here with us.
Daniel is not getting any sleep again. He's got a new love in his life :love:


Actually, I've been sleeping good. Tylenol Night Time Formula! LOL Teresa & I both suffering through head & chest colds.

#25 simplicityac nut OFFLINE  

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Posted January 02, 2012 - 08:30 PM

nice allis,you dont find them everyday

#26 bradvh OFFLINE  

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Posted January 02, 2012 - 09:03 PM

great find and excellent tractors

#27 skunkhome OFFLINE  

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Posted January 03, 2012 - 12:27 AM

Thanks all for the welcome, guess I should have gone to the introductions first but just thought I would look in on you guys and see what was happening. As usual I couldn't stand to sit by and not say something. Thanks for the kind words Daniel. Now enough about that. I am really interested to see if olcowhand catches fire with AC. If anyone can get the most out of these old tractors it is Daniel. I look forward to seeing a full restoration or renovation of the 620 or 720.

#28 olcowhand ONLINE  

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Posted January 04, 2012 - 06:31 PM

Just a few minutes to work on the Allis after the afternoon cattle feeding. So I installed a new spring cushioned seat that Byron threw in with the deal. It sits higher than std seat, but when sat in, the springs bring it down close to std height. Great cushion feel. I had to add steel plate in the rear to reach the rear top trans plate bolts, plus cut a hole in the mount plate. Slide the seat forward, then the hole allows access to checking &/or adding hydro oil.

DSC00678.jpg

When I tightened the pulley to the flywheel, I felt the threads in one hole let go. So I drilled & tapped it to 7/16. Guess I might ought to do the other side, or might be a slight balance problem. I'll run it first to see. If no noticeable vibes, I'll leave as-is.

DSC00680.jpg

#29 olcowhand ONLINE  

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Posted January 04, 2012 - 06:34 PM

I look forward to seeing a full restoration or renovation of the 620 or 720.


Don't be holding your breath, as it will be 1 to 2 years getting redone. Right now I just want to get it in tip top mechanical shape, and even that will be slow due to money shortage.

#30 JDBrian OFFLINE  

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Posted January 04, 2012 - 08:09 PM

When I tightened the pulley to the flywheel, I felt the threads in one hole let go. So I drilled & tapped it to 7/16. Guess I might ought to do the other side, or might be a slight balance problem. I'll run it first to see. If no noticeable vibes, I'll leave as-is.

[ATTACH=CONFIG]27643[/ATTACH]


Daniel it should be OK with a small amount of imbalance that close to the shaft. If the same amount of weight was added at the outer rim of the flywheel the vibration would be much worse. The force is proportional to the square of the radius. So, if the weight was, for instance, 3 times as far from the shaft it would cause 9 times as much imbalance. You also removed some weight when you drilled out the flywheel so it's mostly just the difference in the head of the bolt.




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