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1927 Gotfredson Truck - Clark differential

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PostPosted: Wed Feb 20, 2019 10:19 am    Post subject: Re: 1927 Gotfredson Truck - Clark differential Reply to specific post Reply with quote


I called that phone number above and they have no knowledge of Clark differentials that old. They thought I was joking when I said 1927.

I will slide the yoke back on and feel for play in the gears. Then, I plan to mark the notches with a paint pen before unscrewing them. The vehicle is not at my home so I will update this forum as I go.

Thanks all!
 
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PostPosted: Wed Feb 20, 2019 3:43 pm    Post subject: Re: 1927 Gotfredson Truck - Clark differential Reply to specific post Reply with quote

This patent appears to be related. Note the collar and gland:

https://patentimages.storage.googleapis.com/64/0f/97/de4fee02e4d6fc/US1512402.pdf
 
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PostPosted: Wed Feb 20, 2019 9:10 pm    Post subject: Re: 1927 Gotfredson Truck - Clark differential Reply to specific post Reply with quote

Ok removed the lock pin and unscrewed the center gland (10 complete turns out to remove it). I found there was no washer or felt seal underneath it. Instead, the felt washer was just a donut that went around the shaft, and it gets sandwiched between the shaft and the drive shaft flange. Not exactly sure what holds it in. You can see in the last photo the seal is pretty much worn flat.

Photos are on google links below because I can't get this forum to upload photos.

https://photos.app.goo.gl/Ab4ZrkJ1ogKDQ8nUA

https://photos.app.goo.gl/3yNERaEjWVsRrq6r8

https://photos.app.goo.gl/i29Vz55ppAaHfB836

https://photos.app.goo.gl/1TX88FzKjmQbiomi8

https://photos.app.goo.gl/QNrxom3SkNS14ubN9

https://photos.app.goo.gl/NBXqf4gXashkPYhn8

https://photos.app.goo.gl/DyWtdVKLzgoVHBgS6[/url]
 
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PostPosted: Thu Feb 21, 2019 10:54 pm    Post subject: Re: 1927 Gotfredson Truck - Clark differential Reply to specific post Reply with quote

I removed the felt seal. It sits inside a metal channel on the inside of the gland. So I guess a modern, metal seal would not fit inside that inner channel. Maybe a rubber seal with a spring would fit in there.

https://photos.app.goo.gl/5muB3iugJG4ca5fQ9

https://photos.app.goo.gl/Wbf9rZFuzizBMkgp6

https://photos.app.goo.gl/wQzTDyvRq1sVXwwSA

I am going to try something like this:

https://www.avxseals.com/Shaft-Oil-Seals-TC56x72x8-p/tc56x72x8.htm
 
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