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Euclid R-62 dump truck in 1/24 Options · View
Mr. Scholz
Posted: Monday, March 09, 2020 12:59:30 PM
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Joined: 7/14/2008
Posts: 224
Location: Germany, CE
Kerst, the first car of my father was a BMW Dixi and this car had conical shaped leather clutches, too. So leather is a real good choice for clutch surfaces on a scale model power shift. Thanks also for sharing the drawings of the Clark power shift. Wonderful craftmanship!

Cheers,
Max
kerst
Posted: Sunday, March 15, 2020 9:51:36 PM

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Joined: 9/7/2005
Posts: 1,090
Location: Copake, NY
Thanks for the compliments!
I am in self-imposed isolation in my workshop, so lots of time to work on the Clark transmission.
Here a few pictures of progress. i worked on the clutch assemblies today, still not finished though. Lots of little parts.





I will connect the input shaft (top middle ) with a flexible coupling to the motor with reduction case.
The output shaft (bottom middle gets a bolt-on divider to go to both rear axles.

Kerst


http://forums.dhsdiecast.com/default.aspx?g=posts&m=1096251
RobS
Posted: Monday, March 16, 2020 9:12:37 AM
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Joined: 2/1/2017
Posts: 127
Location: Goshen, Indiana
Incredible work Kerst! An interesting Clark note: They were located not far from me in Buchanan, Michigan. They had a testing facility that lives to this day as Clark Testing. I was there just the other day on a work project. Some very large test equipment including many dynamometers for testing these very gear boxes. So if you need to have this one tested, let me know and I'll hook you up!

Keep the pics coming, this is a fascinating build!

Rob
Exkvate3140
Posted: Monday, March 16, 2020 10:28:41 AM
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Joined: 7/6/2015
Posts: 1,294
Rob they will probably hire Kerst if he goes in there with his project. We need him here.
Amazing work.
Steve
kerst
Posted: Thursday, April 02, 2020 5:07:44 PM

Rank: Advanced Member
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Joined: 9/7/2005
Posts: 1,090
Location: Copake, NY
Due to the crisis I have lots of time for the gearbox. It slowly comes together. I finalized the input and output sides. I hadn't thought about these at all when I started building the gearbox, so some adjustments needed to be made.
I also had to adapt the whole assembly so it would fit in the truck!





Next are the levers to control the shifting. See how that works out!!

Kerst



http://forums.dhsdiecast.com/default.aspx?g=posts&m=1096251
kerst
Posted: Saturday, April 11, 2020 5:56:30 PM

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Joined: 9/7/2005
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Location: Copake, NY
Today I did my first test run and I took a short video.
It is a 4-speed power-shift and the first and second speed work nicely. The third works OK, but the fourth speed seems to take all the power. Too much friction or too much speed.
I will consider a bigger reduction between motor and gearbox.
Here is the video: https://youtu.be/4hA-Vlfxj6M

Here are two pictures of the whole assembly:





Kerst


http://forums.dhsdiecast.com/default.aspx?g=posts&m=1096251
Exkvate3140
Posted: Sunday, April 12, 2020 12:45:36 AM
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Kerst that is just incredible.
Steve
kerst
Posted: Tuesday, May 05, 2020 8:15:54 AM

Rank: Advanced Member
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Joined: 9/7/2005
Posts: 1,090
Location: Copake, NY
I added another motor. It might be overkill and it is easy to take it away. I can also easily change the reduction between motors and gearbox. Now it is 1:4. I tried it with the battery with a much steadier output than the transformer. That is good news!
I bought some micro servos to control the transmission. There is not a lot of space, so one of them sits outside the cab.

Here is the motor unit and the transmission:


Here are both units installed in the truck:


This is the truck with only the transmission:


The servos:


Kerst


http://forums.dhsdiecast.com/default.aspx?g=posts&m=1096251
JohnGalt
Posted: Tuesday, May 05, 2020 11:48:06 AM

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Joined: 6/27/2007
Posts: 1,427
Location: St. Louis, Missouri, USA
Kerst, your machinist skills are amazing. I always look forward to seeing your updates on your projects. Great work.
kerst
Posted: Tuesday, May 05, 2020 5:01:21 PM

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Joined: 9/7/2005
Posts: 1,090
Location: Copake, NY
Campmb
Posted: Tuesday, May 05, 2020 7:12:15 PM
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Joined: 1/22/2013
Posts: 178
Truly an epic build Kerst. You’re machining skills are unreal! I grew up in Euclid where they were built, so it brings back memories. Mike
Quinella
Posted: Tuesday, May 05, 2020 7:26:49 PM

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Joined: 6/18/2003
Posts: 1,935
Location: Charlotte, North Carolina
Kerst: Where did you obtain your skills? This is so over the top for me. What is your profession now? Great build of course. CAW
JoeE
Posted: Tuesday, May 05, 2020 7:37:37 PM

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Joined: 3/17/2006
Posts: 1,146
Location: NJ
Absolutely awesome kerst!
Please keep posting updates.



We rally round the family, with a pocket full of shells.....
Exkvate3140
Posted: Tuesday, May 05, 2020 10:31:32 PM
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Joined: 7/6/2015
Posts: 1,294
Kerst, your truck and your craftsmanship impress with every post, it is just incredible.
Steve
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