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Author Topic: utv's  (Read 3697 times)

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Offline coxy

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Re: utv's
« Reply #40 on: February 14, 2018, 07:35:12 PM »
2012 rtv900, no issues mechanically but has some quirks.
Was $10,000 at that time.
Doesn't like to start in cold weather and even when below 50 degrees must use the glow plugs.
difficult to shift out of gear on a slope unless the brake is depressed, wont go up a fairly steep hill when empty at full throttle, but does just fine when pedal is partially depressed.
I have a 3-1/2 foot rack on mine and heap it up with firewood with no problems.
A real workhorse and very easy on diesel.
Mine doesnt go anywhere near 45 MPH about 25 tops.
No road issues here and mine is not street legal, no lights turn signals etc.
pete the reason it wont go up hill full throttle is that the hydrostat pump is wide open also   try going up the hill then let off and hit it wide open again it should bring the pump down and you should be able to go full throttle with the motor but the hyrostat pump should be mostly closed and you will have lots of power at a snail pace if you know what i mean 

Offline DR_Buck

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Re: utv's
« Reply #41 on: February 14, 2018, 07:58:22 PM »

Here is one of the days I routinely abused my Gator...... and it survived.


 

 


 

 
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Offline John Mc

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Re: utv's
« Reply #42 on: February 14, 2018, 10:21:20 PM »
My UTV is a 1960's era Coot. The grandfather of all ATVs/UTVs. 4WD, 4W-Steer, articulated, amphibious.

Powered by a 16 HP Briggs Vanguard engine (original engine was a 12 HP single-cylinder Tecumseh). Geared for power: top speed is about 20 MPH. No differentials: all wheels turn the same speed all the time (which is why the 4W-steer was a popular option). Will go through just about anything. About the only way to get it stuck is to bottom it out in the snow or mud (it has 12" ground clearance, so bottoming out doesn't happen very often). I have towed 3000# with it on relatively level ground. It will tow 1500# comfortably.

In the photo below, the right rear wheel is just coming down off a big rock, so the articulation between the front and rear tubs is shown. The design keeps all 4 wheels on the ground even in some very rough terrain.



This photo was taken before I put the roll bar back on. I've also since added a winch in the front and a 2" receiver hitch on the rear. This one is my work/beater Coot. I have another that looks better which I will soon add the optional propeller outdrive to (assuming I can find an appropriate prop).

If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline Kbeitz

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Re: utv's
« Reply #43 on: February 15, 2018, 04:53:19 AM »
I like that Coot... I made this 4 wheel drive.

 

 
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Offline Chuck White

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Re: utv's
« Reply #44 on: February 15, 2018, 06:46:27 AM »
John, I had a 1977 COOT, but sold it quite a long time ago!

We had a lot of fun with it, and it would go places that others couldn't!

I also replaced the Tecumseh with the 16hp Briggs, installed a cooling fan to the outside, under the seat!

I used to frequent "Cootworld.com"!
~Chuck~
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Offline John Mc

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Re: utv's
« Reply #45 on: February 15, 2018, 10:48:00 AM »
Hey Chuck. That's great. Where did you mount your fan on your Coot? My engine area does get a bit warm. I've been thinking of doing something similar myself. That's one of the great things about Coots: very easy to customize (my wife had trouble with muscling the 4 wheel steering around, so I put in a "steering quickener", but put it in backwards so it geared the steering down 2:1. Steering is a breeze for her or my 13 year old daughter now).

I got addicted to Coots because the because they are a quirky little thing. I own two running ones, and another for parts. Two other guys in town each own one as well. I like to claim that we have the highest number of Coots per capita of any city in the US (it helps that our town population is only around 2000).

BTW, my wife is from Pulaski, NY (South of Watertown). A lot of her family is still in the area. Her cousin is working as a Verterinary Technician at the Canton Animal Hospital (probably 20 or 25 minutes from you?)

If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline Crusarius

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Re: utv's
« Reply #46 on: February 15, 2018, 11:01:29 AM »
I forgot about the coot. I would love to have one as a toy. But would probably be better as a utility vehicle. Be so easy to customize for anything you want. Could be a dump bed a log hauler a flat bed a seat for more ppl. Now you got me wanting to build one :)

What does that have for an drivetrain?
I knew what I thought I meant.

Offline Banjo picker

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Re: utv's
« Reply #47 on: February 15, 2018, 12:00:09 PM »
 

  

 

I use this machine just about daily.  It is a workhorse, but it does have its limitations.  I have found it to be very reliable as to cranking, but as has been said unless its in the dead of summer you need to use the glow plugs to start it.  It has hauled out every stick of firewood that I have burned since it was new in 2006.  As you can see from the second picture I don't over load it NOW.  I did in the past and had to pay for my sins.  If you will look at the back bumper on this machine it is built in a radius.  The problem is your u joints which on these early models at least were not greaseable.  And you have to jack the unit up and take the bumper loose to get the ujoints out to change them.  I have done that two times over a twelve year period.  I also had to change out one of the front cvc axles...which wasn't a real big job and the axle was just a bit over $100.00.  If you are looking at a used one, you need to have it checked out really good by someone that knows their stuff.  If you had to take one to a dealer to have the rear end u joints done i would bet it would be very expensive.  And on a side note all the kubota parts are high in price, and you just about have to use their transmission oils to make it work right. 

All that said,  I love the little machine and when something needs fixing that gets TOP priority over just about any thing else.  The only way I would get rid of it would be to get another one.  Banjo
Cooks AC 36--Prentice 210C--Morgan edger--Kubota M7040 with loader--Case 580 K with extendahoe--Case 850C dozer--Int 1700 series twin cylinder dump/log/flatbed truck--logging arch--2 Logrite mill sp.--Cat claw sharpening system--And a bulldog to make sure it all stays here.

Offline John Mc

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Re: utv's
« Reply #48 on: February 15, 2018, 12:55:18 PM »
I forgot about the coot. I would love to have one as a toy. But would probably be better as a utility vehicle. Be so easy to customize for anything you want. Could be a dump bed a log hauler a flat bed a seat for more ppl. Now you got me wanting to build one :)

What does that have for an drivetrain?

Drive train is fairly unusual: There is a variable pitch clutch consisting of the drive clutch on the engine, and a driven clutch on the input shaft of the transmission, connected by a special drive belt. As the engine speed increased, parts on the drive and driven clutches moved, changing the pulley ratio between the two. (A similar system was used on some snowmobiles at one point.) The Apex transmission had two forward gears and one reverse. This connected via chain drive to a drive shaft running almost the length of the Coot. The driveshaft connected to "Torque Transmitters", one on the front axle, and one on the rear - right where you would expect a differential to be if it had differentials). The torque transmitters had a worm gear driving a ring gear on the axle, providing further gear reduction.  I liked the look of the ring and worm gear enough that I replaced the lid on the front Torque Transmitter with a Lexan cover, so I could see it in operation.

I ended up replacing the speed sensitive clutch with a torque-sensing model. This is quite an improvement in the way the Coot handles a load, you can now get full RPMs out of the motor even at low speeds (1st gear was already quite low, but the change greatly reduces the need to downshift when you get to a hill when puling a load).

With no differential, the 2 wheel steer models took some space to get turned around (though if you were lucky, there was enough slip on soft ground to allow tighter turning). The 4WS models improved turning radius significantly, though tight maneuvering is still not the Coot's strong point.

You can find out more at the Coot user's group at www.cootworld.net
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline Crusarius

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Re: utv's
« Reply #49 on: February 15, 2018, 12:59:19 PM »
so lots of room for improvement :)
I knew what I thought I meant.

Offline John Mc

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Re: utv's
« Reply #50 on: February 15, 2018, 01:22:54 PM »
so lots of room for improvement :)

Yeah, but there is an upside to that drive train: the same thing that makes for a larger turning radius also makes it drive through just about anything. If just one wheel has traction, you're going to move, and because of the articulation, it's very rare that only one wheel has traction: all four wheels are on the ground regardless of terrain. High ground clearance and a smooth belly lets it get through a lot of tough situations. And there is the amphibious part: no one would think that a 1000# hunk of steel and rubber would float - it sure doesn't look like it would. It can make for some fun reactions when we "accidentally" drive into out pond with someone who is not familiar with a Coot. Speed in water with the original military jeep tires is only about 2 knots. The propeller out-drive increased that to about 4 or 5 knots. (which is why I'd like to eventually get my nicer Coot set up with the prop. The "woods beater" will not get a prop - one more thing to worry about banging up in the woods.)
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline Crusarius

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Re: utv's
« Reply #51 on: February 15, 2018, 01:36:22 PM »
I know all about that stuff :) here is my other UTV.



I knew what I thought I meant.

Offline John Mc

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Re: utv's
« Reply #52 on: February 15, 2018, 01:52:56 PM »
Holy Toledo! You don't need a Coot, or a UTV for that matter!
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline Crusarius

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Re: utv's
« Reply #53 on: February 15, 2018, 02:02:00 PM »
with the UTV I can fit between the trees. And I don't care much about the body on my UTV. This is how it came to me. The only thing that was holding it together was the mud



I knew what I thought I meant.

Offline petefrom bearswamp

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Re: utv's
« Reply #54 on: February 16, 2018, 09:34:30 AM »
Thanks for the useful hint Paul.
Cresarius what does it look like now?
LT40SHDD51
Kubota 8540 tractor, Farmi winch
Kubota 900 RTV
Polaris 550 Sportsman ATV
1 Husky 1 gas Echo 1 cordless Echo
241 acres of woodland

Offline Crusarius

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Re: utv's
« Reply #55 on: February 16, 2018, 09:53:48 AM »
I will have to get a picture next time I have it out. This is what the knuckle is supposed to look like.





This is how it actually looked




Thats what happens when there is a bad wheel bearing and you just continue to beat on it.
I knew what I thought I meant.

Offline caveman

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Re: utv's
« Reply #56 on: February 16, 2018, 10:52:49 PM »
 

 
We have a TS gator.  It is a handy tool hauler and my daughter uses it daily to haul the hog manure trailer to the compost pile.  I have had to weld the exhaust manifold back to the exhaust flange but other than that it has been trouble free.  It has over 1500 hours.  The little machine will high center pretty easily and being a 2wd it is about useless in hilly terrain (I hauled it to the N. Georgia Mountains once), but with the floatation tires and the differential lock it does relatively well in mud and sand.

The trailer was made from an old, worn out JD AMT.
Caveman

Offline Kbeitz

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Re: utv's
« Reply #57 on: February 17, 2018, 01:14:10 AM »
I have been enjoying my mules. They have a rough life.

 

 

 

 
Collector and builder of many things.
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