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stanz Advanced Machine Builder


Joined: 15 - April - 2007
United States Posts: 871
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| Posted: 05 - February - 2008 at 12:44 | IP Logged
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Have you ever seen the rear swing axles on an old rear engined Fiat or VW? Just like that! Let me see if I can rustle up a picture.
Quote: METAL MOOSE i understand the chain and bogie assembly, but how would you build the side axles?
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stanz Advanced Machine Builder


Joined: 15 - April - 2007
United States Posts: 871
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| Posted: 05 - February - 2008 at 13:03 | IP Logged
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Okay, I found a drawing of a swing arm and axle hub. Bolt the two flanges to a housing that runs from the front wheel to the rear. Chain drive on the inner side of the hub.
 The flange is strong enough to support the axle on one side, at least it was on my Fiats. I think VW used something a little different. I don't remember it's been 28 years or so since I've owned a VW Bus.
Does that help?
__________________ Stan in MA
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f350ca Advanced Machine Builder

Joined: 04 - January - 2004 Posts: 905 Home Town, State/Province: Calabogie Ontario Canada
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| Posted: 05 - February - 2008 at 13:47 | IP Logged
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It looks like their walking beam is a small version of whats used on a road grader. They use a chain drive but I have no idea what is used for a tensioner.
__________________ Mechanical Engineers build weapons, Civil Engineers build targets.
Greg
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camdigger3 Senior Machine Builder

Joined: 11 - August - 2005 Posts: 1478 Home Town, State/Province: Wimborne, Alberta
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| Posted: 05 - February - 2008 at 15:08 | IP Logged
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That's exactly what I had in mind. A walking beam tandem rear like a road grader...
__________________ Design to 0.001", measure to 1/16", and cut with an axe......
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tom Senior Machine Builder


Joined: 21 - February - 2006
United States Posts: 1373 Home Town, State/Province: kodiak alaska
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| Posted: 05 - February - 2008 at 22:36 | IP Logged
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I have done my share of road graders, They use two 100 chains one to each wheel with center drive Axel and no tensioners.
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nylli Machine Builder


Joined: 09 - March - 2007
Finland Posts: 172 Home Town, State/Province: Kallby/Finland
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| Posted: 06 - February - 2008 at 00:42 | IP Logged
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I took a snapshot from one of the movies to get the pivot, and it looks pretty easy to make. here is the pictures.


Edited by JoeJ on 07 - February - 2008 at 06:56
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camdigger3 Senior Machine Builder

Joined: 11 - August - 2005 Posts: 1478 Home Town, State/Province: Wimborne, Alberta
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| Posted: 06 - February - 2008 at 07:35 | IP Logged
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Nylli
That joint shouldn't be too hard to make, but that design will probably require some basic machining for the pivot. To me, it looks very similar to this..
Note the grease fitting to the right of the bolted flange, it is for the pivot joint that lets the front and rear section "walk" over obstructions and is where the machining was done. I made a cartridge to slide in to deal with maintenance. The pivot is a 2" (52 mm) OD bar inside a flanged sleeve with a collar on the inboard end for a retainer. The main difference I can see is the C in the image here is only 3" (76 mm) high while the one shown in your screen capture is almost twice that wide.

Cam
Edited by camdigger3 on 06 - February - 2008 at 07:38
__________________ Design to 0.001", measure to 1/16", and cut with an axe......
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nylli Machine Builder


Joined: 09 - March - 2007
Finland Posts: 172 Home Town, State/Province: Kallby/Finland
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| Posted: 06 - February - 2008 at 09:25 | IP Logged
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It's also the same system that i made on my cadtrac, I think they are stronger if the C is a little wider.

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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 09:59 | IP Logged
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 10:02 | IP Logged
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Above pic is how it did mine. Its a Jeep 4x4 front end outer hub. Drive
shaft runs right thru the middle. Original wheel hub provides 360 degrees
of swivel if needed. Drive shaft on right is where the locking hub would
normally be. I found a yoke with the same splines and plugged it in.
Jim
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stanz Advanced Machine Builder


Joined: 15 - April - 2007
United States Posts: 871
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| Posted: 06 - February - 2008 at 10:19 | IP Logged
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Um, Jim, you don't get away that easy ... show us your tractor!
We need pictures!
I like the through the axle drive shaft idea. It's actually cleaner than the unit we're talking about on this thread.
Quote: jimw Above pic is how it did mine. Its a Jeep 4x4 front end outer hub. Drive
shaft runs right thru the middle. Original wheel hub provides 360 degrees
of swivel if needed. Drive shaft on right is where the locking hub would
normally be. I found a yoke with the same splines and plugged it in.
Jim
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f350ca Advanced Machine Builder

Joined: 04 - January - 2004 Posts: 905 Home Town, State/Province: Calabogie Ontario Canada
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| Posted: 06 - February - 2008 at 13:53 | IP Logged
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Tom, Wondered if that was what they did. On a similar line of thought, am thinking about building a small mechanical drive off road truck, sort of rock truck looking thing. Tandem rear end, articulated, with tilting front axle. I imagine a grader as having a more constant load on the drive than a off road vehicle. Wonder if the chains would slap too much as you roll over obstacles or come on and off power. To worsen the effect I was thinking of using a single driveline brake.
__________________ Mechanical Engineers build weapons, Civil Engineers build targets.
Greg
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 14:35 | IP Logged
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 14:43 | IP Logged
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Couple pics. Machine is 4 wheel drive, articulates and swivels. Runs on 35
inch tall 700x20s redrilled to fit 5 on 5.5 drums. Powered by a 13 hp Honda,
runs a hydraulic pump which powers a hydraulic motor thats reduced 4 to1into
a 4 speed trans, then reduced again 4 to 1 to the drive shaft which powers
front and rear drives. Has a winch powered hoist on the back simaler to a
three point hitch. Used for lifting logs off the ground to haul in for firewood.
Back body can also hold a fair amount of firewood.
Edited by jimw on 07 - February - 2008 at 09:33
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 14:46 | IP Logged
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Here is the rear log hoist, will lift a number of logs up off the ground.
Have trailer hitches front and rear.
Jim
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 14:49 | IP Logged
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Side veiw.
Its a work in progress, but it runs, works and drives well.

Edited by JoeJ on 07 - February - 2008 at 06:55
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blackdog_006 Advanced Machine Builder

Joined: 12 - December - 2007
United States Posts: 348 Home Town, State/Province: Chatham Va.
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| Posted: 06 - February - 2008 at 15:09 | IP Logged
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Thats a nice lookin iron oxide painted machine Jim
__________________ If man made I can cut it up and scrap it out
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 15:11 | IP Logged
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Not ready for real paint yet, figured somebody would pick up on that.
Jim
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camdigger3 Senior Machine Builder

Joined: 11 - August - 2005 Posts: 1478 Home Town, State/Province: Wimborne, Alberta
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| Posted: 06 - February - 2008 at 15:29 | IP Logged
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Don't worry about the color Jim! After all rust is a color! 'sides, it would be tragic to mess up a new paint job doing a modification.
I can't tell exactly how the steering is done. It looks like you've used a conventional sttering box and simply fabbed a link?
Cam
__________________ Design to 0.001", measure to 1/16", and cut with an axe......
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jimw Machine Builder In Training

Joined: 17 - January - 2008
United States Posts: 22
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| Posted: 06 - February - 2008 at 15:42 | IP Logged
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Cam
You are correct, i readjusted the steering box and pitman arm to fit
and made an adjustable tie rod to steer it. Plans for hydraulic power
to it later.
Jim
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