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Ooohhh Deere
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No more. It's all hype in our country. Only if your cutting 7-8 t/ha green wheat or barley off at the ground and useing the chopper, you might want the 690 HP. But even then you would have rotor loss before needing the HP. Just got off a 690 doing exactly the above. Not sure of fuel use but its not to bad. Used 4 bars on the guage for 7 rotor hrs. 400litres??

I predict the 680 to be the more sort after trade in for second hand buyers.
 

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Super Moderator
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5,041 Posts
No more. It's all hype in our country. Only if your cutting 7-8 t/ha green wheat or barley off at the ground and useing the chopper, you might want the 690 HP. But even then you would have rotor loss before needing the HP. Just got off a 690 doing exactly the above. Not sure of fuel use but its not to bad. Used 4 bars on the guage for 7 rotor hrs. 400litres??
In the conditions you describe?:eek:
600 L. Rock bottom minimum. Guaranteed.
http://tractortestlab.unl.edu/c/doc...1-41b4-a329-133c2765632c&groupId=4805395&.pdf
The max fuel use on that tractor is roughly 110 liters/hr, but the combine is running about 10% more power so would be capable of even higher use.
Gauges are for guidance. Poor guidance in this case
 

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Nice report Don! Even at no load, the engine is at a whopping 27 liters/hour or 7 gal/hr!! It makes you wonder how come an engine can't be designed to be more efficient. Most of the companies these days brad that T4 has made the engines more efficient!
 

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Nice report Don! Even at no load, the engine is at a whopping 27 liters/hour or 7 gal/hr!!
A Claas 780's max fuel use is just barely over 100 L/hr. And about 4.5 to 5% DEF.
A lot of straw after the snow and in the case of canola, tough standing green straw using close to EPL*, yet my season overall average was almost exactly 50 L/hr. Which doesn't seem so bad.:)

*New acronym: EPL = Engine Power Limit
 

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Nice report Don! Even at no load, the engine is at a whopping 27 liters/hour or 7 gal/hr!! It makes you wonder how come an engine can't be designed to be more efficient. Most of the companies these days brad that T4 has made the engines more efficient!
It's all the parasitic losses, fan, hydraulic pumps, alternator(s).
If you take an absolutely bare engine my SWAG would be fuel use would be linear to engine speed or very close.
 

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Discussion Starter · #8 ·
Thanks for ? You guys talk about fuel consumption like its a major cost of farming .do your sums on chemical and fertiliser and you will soon learn that it is irelivent. Look at the quality of build at 1500 hours compared to red machines and see what is important .neighbours around here have had a gut full of case poor build quality, but something's never change
 

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Thanks for ? You guys talk about fuel consumption like its a major cost of farming
Not a major cost but not irrelevant either but should be heading down soon.:)
Fertilizer (fertiliser as you folks spell it) has been far and away the big killer expense what with 300 to 400 kg/ha application having now become common in this area and with seed costs creeping up especially in the corporate controlled canola seed market.
The thing is if fuel costs are less that just means higher capacity with less power, everything else being equal.
 

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Ooohhh Deere
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110 L/HR...........maybe at 120% load. Too much scare mongering.
At idle is 7 litres an hour.
For the seven rotor hrs done equals 69 L/HR.
I'd say this thing is better on fuel than our 9870's.

And yes the yield figures are wrong in the pic. The mass flow sensor is playing up and can't be calibrated.
That pivot averaged 7.8 t/ha.
 

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110 L/HR...........maybe at 120% load. Too much scare mongering.
Nope.
Direct interpretation of
http://tractortestlab.unl.edu/c/doc...1-41b4-a329-133c2765632c&groupId=4805395&.pdf
NTTL link.
At the max power of 338.71 kw @ 2101 @ 3.08 kw/L is...ta da, 109.9967532 liters.
However, that is at only at a rated engine power which is 560 @ 2100, the combine you operated is capable of 617 @ 1900.
The tractor fuel use touched around 115 liters at what looks like would be in that 610 to 620 engine hp range @1900rpm.

You maybe never saw these sort of readings as it would only be instantaneous spikes of fuel use.

Zero (0) scare mongering.
Facts.
 
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