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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: 15 - October - 2007 at 13:20 | IP Logged
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Hi everybody
I was surfing a little on the net and find an alstor 8x8 wheeler.
I looked at the homepage, and i think it would be possible to make a similar
machine.
WWW.alstor.se
Edited by JoeJ on 02 - February - 2008 at 13:32
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Mike Van
Senior Machine Builder
Joined: 18 - August - 2006
 United States
Posts: 1035
Home Town, State/Province: Kent Ct. USA
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| Posted: 15 - October - 2007 at 17:29 | IP Logged
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That would be a handy rig. It sure is nice sawing logs that haven't been drug through every mud-hole in the county too!
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Mike Van
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Dawg
Senior Machine Builder
Joined: 27 - October - 2004
Posts: 1761
Home Town, State/Province: Wisconsin
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| Posted: 15 - October - 2007 at 18:49 | IP Logged
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You forgot to drag it through a gravel pit after they've been wet. lol That little machine looks to be able to go almost anywhere, and haul a pretty good size pile of firewood. Maybe real close to a face cord. Do you know max length?
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"I never failed once. It just happened to be a 2000-step proccess" (quote from Thomas Edison)
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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: 15 - October - 2007 at 23:44 | IP Logged
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The full length of the machine is around 15 feet and the width is 4.5 feet
so i think a 12 feet log should work fine.
They have some movies on the machine in action on alstor's homepage
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tootroubled
Machine Builder
Joined: 06 - July - 2005
Posts: 117
Home Town, State/Province: Nanaimo,B.C. Canada
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| Posted: 16 - October - 2007 at 19:55 | IP Logged
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My question is how do they turn the thing when the front half the axles are joined?
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mdlawnguy
Advanced Machine Builder
Joined: 08 - December - 2005
Posts: 952
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| Posted: 17 - October - 2007 at 18:12 | IP Logged
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from what it looks like to me with the movies.. drives like a front end loader each side moves as it is forced by the stering wheel. or there is somesort of dozer drive two peddles one for right and the other for left u turn th machine with the wheel and it "skids the brake??"on the inside set of tires open differential not lockers.. good movies but looks pricey...
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METAL MOOSE
Machine Builder In Training
Joined: 09 - January - 2008
Posts: 11
Home Town, State/Province: Whitbourne Newfoundland
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| Posted: 02 - February - 2008 at 13:09 | IP Logged
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we need more photos, looks like the engine and trans setup is like that which runs like in an argo.
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JoeJ
Sheriff Department
Charter Member
Joined: 24 - December - 2003
United States
Posts: 4954
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| Posted: 02 - February - 2008 at 13:34 | IP Logged
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 Hey Moose, His link works,,,just remember to click for the english version on that page, makes it a lot easier to read .
HOT DIGGITY, here you go...
http://www.alstor.se/engdata.html
Edited by JoeJ on 02 - February - 2008 at 13:37
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JoeJ 
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stanz
Advanced Machine Builder
Joined: 15 - April - 2007
United States
Posts: 871
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| Posted: 02 - February - 2008 at 15:19 | IP Logged
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Basically it's a short tractor with a powered trailer. They do have a version with tracks:
Some of the things they make it do in the movies are wacky, steep inclines while dumping!?
It looks like the steering is done at the articulation joint. I guess that's what they mean by "waist steering". The turning circle isn't that bad since the tractor portion is so short.
Very interesting machine.
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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: 02 - February - 2008 at 18:32 | IP Logged
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That would be good for around here and down in some of the swamps in this area.
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If man made I can cut it up and scrap it out
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akabull
Advanced Machine Builder
Joined: 17 - March - 2007
United States
Posts: 368
Home Town, State/Province: Albany Township, Maine
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| Posted: 02 - February - 2008 at 20:04 | IP Logged
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now that's cool! what a back saver that would be.
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Chris in Maine
Never criticize a man until you've walked a mile in his shoes, because by then you will be a mile away and have his shoes.
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JoeJ
Sheriff Department
Charter Member
Joined: 24 - December - 2003
United States
Posts: 4954
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| Posted: 03 - February - 2008 at 11:07 | IP Logged
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 Stan,
I only watched 1 of the videos. It was the rough terrain one. 2 things I'd want are a lower seat and sturdier roll bar!!
BUT, I was amazed at where and how they drove it .
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JoeJ
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METAL MOOSE
Machine Builder In Training
Joined: 09 - January - 2008
Posts: 11
Home Town, State/Province: Whitbourne Newfoundland
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| Posted: 03 - February - 2008 at 19:30 | IP Logged
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anybody know how much this thing costs
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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: 04 - February - 2008 at 00:08 | IP Logged
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Hi
I think the price is something like 30,000$, have read it somewhere.
I have done a little modelling on a similar machine. Here is one picture how i think the
boogie is made.
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jimw
Machine Builder In Training
Joined: 17 - January - 2008
United States
Posts: 22
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| Posted: 05 - February - 2008 at 08:20 | IP Logged
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How do you suppose chain tensioning is done ? I have built a couple 6 and
8 wheel drive vehicles using chain and the tensioning is a problem.
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: 05 - February - 2008 at 10:24 | IP Logged
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Jimw
My guess on chain tension would be a teflon or similar slider on what would be the slack side of the chain when the machine is moving forward or an idler, but I don't see enough room in the drive's walking beam to accomodate an idler.
The chain shouldn't change length too much. The adjustment would only have to take up a maximum of 1/2 pitch (or half the length of a single link). You could almost take up that much with clearance in the mounting holes of the drive sprocket inside the walking beam. Adjustment for more than one link is unnecessary because you'd just make the chain shorter.
Cam
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Design to 0.001", measure to 1/16", and cut with an axe......
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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 10:34 | IP Logged
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Hmmm now for a shopping list...
Engine, CVT/Clutch assembly from a snow machine or combine, misc u joints from a pull type swather, misc roller chain sprockets, mini hydraulic system out of an old combine ( Massey 90 & 92s had an all in one unit that would be adequate ), 1 diff out of compact pickup or similar, orbitrol steering valve, steering cylinder, misc iron, 8 hub and tire assemblies, 2 sets bevel gears....
Oh, and about a month of shop time to put it all together.........
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Design to 0.001", measure to 1/16", and cut with an axe......
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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 11:43 | IP Logged
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Jim,
It looks like each side is comprised of two swing axles that pivot at the center point. Since the length of the axle doesn't change, the chain tension doesn't change either. If you look at nylli's drawing above and the picture below you may see what I mean.
 Great wheel clearance in the center since the drive unit is up high in the mid section.
I looked at some of the movies and pictures ... I don't think each side is two separate units. It may just be one large assembly that pivots in the center of each side.
Quote: jimw How do you suppose chain tensioning is done ?
Edited by stanz on 05 - February - 2008 at 11:56
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METAL MOOSE
Machine Builder In Training
Joined: 09 - January - 2008
Posts: 11
Home Town, State/Province: Whitbourne Newfoundland
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| Posted: 05 - February - 2008 at 12:14 | IP Logged
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i understand the chain and bogie assembly, but how would you build the side axles?
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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 12:25 | IP Logged
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Personnally, I'd put a bearing on each side of the sprocket and let the out board end stick through far enough to put a wheel hub on for the wheels and do the same for the input shaft on the inboard side. I'd also give serious consideration to some kind of seal in addition to the lip seal on a ball bearing behind the wheel hubs in light of the service environment.
My $0.02
Cam
Edited by camdigger3 on 05 - February - 2008 at 15:06
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Design to 0.001", measure to 1/16", and cut with an axe......
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Topic: A little 8 wheeler
