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Discussion Starter #1
Can anyone tell me what the differances are between the 9660 sts and the 9670 sts.
I havent sighted one in Australia yet
Is the horsepower the same?
Are they the same mechanicaly?
I beleive the cab is a bit differant and the sticker on the side has had the 6 changed to a 7
What are the differances in the cab?
 

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Hello there, here's what I've seen and learned. I'll compare a 2007 9660 STS (what we ran last fall) to a 2008 9670 STS (whats on order for next fall). Okay now the 2007 9660 already had a bullet rotor and the 9.0L engine. (I'm sure you know, both combines are a class 6) The new combines have the following changes (this is specific to the 9670, not 9770 or 9870): Clean grain elevators have an 8% increase due to a faster speed. The cleaning shoe has a more aggressive stroke, shoe drive pulley is heavy and cast acts like a flywheel to run smoother. Same horsepower- 305 with same boost as before. There`s a new chopper design, The outside has dedicated fan blades for more spread, inner blades move the wings closer to the chopper rotor, requires less HP with better spread. New design chopper drive...I don`t know if it is heavier for this size, but you no longer have to loosen the belt to raise the chopper. The cab has some changes, new color monitor on the armrest, settings are supposed to be dialed in using the monitor and a dial, no more holding the button to the correct setting. If you want 900 rotor rpm dial it in and press enter. (as far as I understand it...no experiance with that) I think that is all...if you have heard more or have questions feel free to ask.
Personally, I feel it may have a little more capacity that the 9660. As these combines a likely to be limited (here in Canada) due to horsepower, the savings on the chopper design may give us a little edge on the old ones. I know our 9660`s seemed to gain from the bullet rotor and the tough handling (rice) feed accelerator over previous models we have run. NOTE last year was our first year running 9660`s, however we had demos as well as custom guys running earlier models. Maybe it was just me, but it seems these smaller combines benefit the most when the say something will take less HP to run. Last year, one combine broke both chaffer arms, one on one day another a week later. Other combine had no trouble with this. Hoping new flywheel drive will overcompensate for the more aggressive sieve stroke. Making it easier on the arms.
Now the 9770 and 9870 both get bigger clean grain system I think it is 15%(bigger augers and elevator). They both get more horsepower 9870 is now about the same as the 9860 premium. The 9870 gets dynfloII ICC (translation: Increased Cleaning Capacity) which is a front fixed precleaner extended with some air diversion changes plus more fan rpm. The 9870 also gets an optional multispeed feederhouse. Basically a 5 speed powershift(at the primary countershaft gearbox)-with the same reverser gearbox idea- might be heavier. Gets away from variable speed belt and torque sensor for heavy duty fixed speed belt. Gears can be changed on the go to match ground speed/condition. Sounds like thats meant for new corn headers, as most other headers are limited to 1st or 2nd gear. Any how, the deere website has more details. If you wanna see some other deere combines...check out the european website. 400+ HP CTS 530HP STS
 

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Discussion Starter #3
Thank you both
Horsepower is not such a big factor down here, as the crops are geneaaly lower yield and dryer than you experance in the Northern hemesphere. Two years of Drought, and very low crop yields havent tested any machine lately.
I already have 2 of the earlier 9660, without the bullit rotors, but i do belive they are an improvement.
 

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Re: 60 series differences to 70 series

wow, that was quite a mouthful. you did some research
sounds pretty good, just a few corrections and additions
you don't have to press enter to adjust the speed, just dial it in and it is automatic
98 and 97's have a faster and bigger augers, the elevator is the same size
the "Command Touch" feeder house drive is standard on the 9870 only, and yes it is geared toward the new 600 series corn heads, you only get 1st gear when a corn head is not attached to the combine

farmboy...
your shoe arm problem wasn't due the aggressiveness of the shoe, deere had a bad batch of arms last year and everyone was breaking them, after replacment we didn't have any go
 
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