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 Project UTV

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Jonny Briggs
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PostSubject: Project UTV   Fri Feb 01, 2013 12:31 pm

I have finally started to fabricate my build after sourcing most of the parts.

I am aiming to build a 4wd quad/ tractor/ utility vehicle. Im a carpenter and its going to be used for shipping tools and materials over rough terrain. I was originally going to use a transaxle gearbox to power the front and rear axles but think I will use chains and a torque converter.

Here is the start of the front end that I started today. I cannot decide to go for a solid rear axle or have a diff in it. Any thoughts.

I have looked at this forum for ages, so its nice to have some content to add.

Jonny




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dangeroustoys56
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 6:26 am

Yep thats the easiest way to build a 4x4 tractor with that setup. Possible setup would be a 700 peerless with a chain drive to a straight axle - can make it articlulate if needed .

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PostSubject: Re: Project UTV   Sat Feb 02, 2013 12:06 pm

Lookin good.

Is that all rear steer parts?l
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W1ldyOvvnZ
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 12:55 pm

@muddstir wrote:
Lookin good.

Is that all rear steer parts?l
Thats what it looks like.
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 2:41 pm

Looks good.
I would do a soild axle.
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 4:10 pm

Looks really though.

Whats your clearances for your axle? Obviously youre going to need room for a sprocket/ pulley and a disc brake, unless you run with a transaxle which might compromise clearances even more.

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Jonny Briggs
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 5:58 pm

The parts UJ steering was bought off ebay for £30 which is about $50. I am going to add a bar underneath to strengthen things up.

I had thought about the clearance issue but just going to have to deal with it.

It's only going to be front wheel steer.

A thought I've been thinking about is setting up a reverse gear somehow.

Jonny
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Doug
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 6:02 pm

Are you going to be using a transaxle? Or a transmission?

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PostSubject: Re: Project UTV   Sat Feb 02, 2013 6:05 pm

Going to use a Comet torque converter going to jack shaft that then splits to the front and read axle.
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PostSubject: Re: Project UTV   Sat Feb 02, 2013 6:18 pm

Gonna have to have a section of chain go to a double gear ( OO ) if you want some reverse I believe.

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PostSubject: Re: Project UTV   Sun Feb 03, 2013 10:26 am

I think I am going to scrap the idea of a reverse gear!

However I am still contemplating having a mid differential. So the set up would be jack shaft from torque converter with 8 toothed sprocket to a 40t sprocket mounted onto the diff housing. On each axle will be a sprocket sending the power to front and rear wheels.

The question I'm pondering now is with the gear ratio of 1:5 going to the mid diff, can I get away with smaller sprockets on the axles to improve ground clearance. The chain and sprockets are just transmitting the power.
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Doug
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PostSubject: Re: Project UTV   Sun Feb 03, 2013 3:53 pm

Depending on what size is coming out of your diff you can go with whatever size you want. I wouldnt go too small though just to ensure you dont get skipping.

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Chopperhed
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PostSubject: Re: Project UTV   Sun Feb 03, 2013 4:17 pm

Sprocket size doesn't affect chains as long as the tension is correct. If you dont have any adjustment a good spring loaded idler will keep chains from jumping teeth.
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Doug
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PostSubject: Re: Project UTV   Sun Feb 03, 2013 4:59 pm

@Chopperhed wrote:
Sprocket size doesn't affect chains as long as the tension is correct. If you dont have any adjustment a good spring loaded idler will keep chains from jumping teeth.

Are you sure? What about a mountain bicycle then? Id imagine they work the same way, 1 rotation of a 10" sprocket would mean 2 rotations of a 5", wouldnt it?

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PostSubject: Re: Project UTV   Sun Feb 03, 2013 5:07 pm

Size doesn't affect chain skipping but it does affect drive ratio.

My post was about skipping not anything to do with ratio.

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Doug
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PostSubject: Re: Project UTV   Sun Feb 03, 2013 5:17 pm

@Chopperhed wrote:
Size doesn't affect chain skipping but it does affect drive ratio.

My post was about skipping not anything to do with ratio.


Oh, I see now. Im stupid. Carry on.

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PostSubject: Re: Project UTV   Sun Feb 03, 2013 6:02 pm

That looks bad ass Very Happy
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PostSubject: Re: Project UTV   Mon Feb 04, 2013 7:38 am


The front axle is fixed but I will be able to adjust the central jack shaft and rear axle.

Next problem. I'm using a b and s 11hp vertical shaft engine but want to use a torque converter so going to have to make a ragb. I have a hydro transaxle that I stripped and the diff gears and shaft bearings should be fine for this.
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PostSubject: Re: Project UTV   Tue Feb 05, 2013 4:33 pm

Did a bit more work on the front end today.

Cut the axles down and started on the steering.

the pictures show the chassis flipped upside down



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PostSubject: Re: Project UTV   Tue Feb 05, 2013 4:44 pm

That is looking pretty badass!

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PostSubject: Re: Project UTV   Tue Feb 05, 2013 5:18 pm

Wow, this looks like it will turn out to be quite the build!

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PostSubject: Re: Project UTV   Tue Feb 05, 2013 6:00 pm

Can you put a link to the front steering parts Please?
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W1ldyOvvnZ
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PostSubject: Re: Project UTV   Tue Feb 05, 2013 9:10 pm

Looks pretty sick, are you leaving the UTV unlocked all the way around?
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PostSubject: Re: Project UTV   Tue Feb 05, 2013 10:19 pm

Looks like there's room in that diff for a spring loaded posi setup.
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Jonny Briggs
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PostSubject: Re: Project UTV   Wed Feb 06, 2013 5:30 am

What's a posi set up? The rear axle is solid but front will be left open to help with steering.

The central diff will help with tyre scrubbing.

The steering was a lucky eBay find, they were listed as small tractor PTO

Hoping to get the sprockets on this weekend.

Then make the Ragb for engine
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