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Discussion Starter #1
Re: 9750 sts western canada special

Great to have you with us.
Don't think there was anymore other then what you said and not a 9860STS.
Hope some that have them or had them will say.

Tom Turner
 

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Re: 9750 sts western canada special

Nov 29, 2008, 5:54pm, mennoboy wrote:Question on a 9750 sts western canada special. Looking at buying one. What is different on it from a standard 9750? I know it is a 2003 and has the 12.5L engine with 375hp. Bigger rotor belt. Anything else different? I understand that it was the precursor/prototype of the 9860. Does it have some of the other 60 series improvements?
Thanks for any info.

You basically have it, no 60 series stuff though, nor high unload rate.
The rotor belt is larger because the sheaves are much larger in diameter giving much more surface area for friction, still the best drive in the industry.
And welcome.


Don
 

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Re: 9750 sts western canada special

Are you guys sure about the bigger rotor belt? I don't think its as big as the 9860 belt. A local hutterite colony had 4 9750s with the 12.5L engine and they had a 1 or 2 spare belts hanging on the blinker and I think they had almost a pickup bed full of burnt belts at the end of the season. I would seriously consider if it is worth it or be better off with a 2004 9860 (which never burn rotor belts)
 

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Re: 9750 sts western canada special

On the 9860STS there is a change in belt and pulley from SN number from 705798 to a different ones then then the 9750STS, so the early ones had the same and later 9860STS are bigger.
 

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Re: 9750 sts western canada special

I think your right jd, the larger sheaves/belt didn't happen until the 9860. Sorry, I was mixed up between the two.
I think belts are better now, doesn't the 9770 run more than 375 and still use the small sheaves? There was some cam angle changes along the way too.

Don

Oh, I see you already hit the parts book Tom, good job.
 

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Re: 9750 sts western canada special

I have run a 9770 and my neighbor has a couple of them too and you can run that machine as hard as you want and the belt won't smoke. Another neighbor has a 9760 and they usually smoke a belt once or twice a year. I have unplugged a rotor on a 9860 once and it would not smoke the belt with the concave open in 1st gear, it would just kill the engine. That was a long day . . .
 

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Re: 9750 sts western canada special

I looked at one a few years ago. I'm not sure I see the advantage to having the 375 hp 12.5 over the 325 ph 8.1, at least in our conditions. I think it might have a fit in areas where dry wheat is harvested with tough straw. We typically harvest dry grain with dry straw.

I was on a farm a couple years back that had one with a Crary tip up topper on it. When they got 400 bu on that thing it took forever to unload. Depending on your harvest conditions, I might be concerned that unloading speed would slow the operation down. Dunno for sure tho.
 

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Re: 9750 sts western canada special

Interesting, the really early model 9860s (possibly 2003 prototypes) must have had the small sheaves cause we had a 2004 that had large ones.
 

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Re: 9750 sts western canada special

Hello everyone, thought Id give my thoughts on the 9750sts special, jd manitoba you are correct about rotor drive issues on these models, they run the same size sheaves as the 9750sts north america, along with that they run a special sensor to monitor rotor drive pressure, too much load will cause the overhead display to alert operator to slow down.This was also true of early build 9860sts, you can convert these to the larger sheaves if needed. The earliest 9860sts I have worked on is serial no.706238, a 2004 model , this machine has the large sheaves, the serila no. range that tom turner posted is correct when the change occoured.Also the couple 9750sts specials i've seen in our area have the h.u.r auger, so not alot of differences between a 9860sts and the special. As far as the question about the 9770sts having small or large sheaves , as of the 70series all class 7-8 machines have the large sheaves.460 your 9660sts will have the same size as a 9670sts or 9760sts.
 
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