Are the Nebraska Tractor Tests done on a tractor that has the engine broken in, been used for a while doing some variation of real world chores and has maybe 100 hours on the clock?
Or a spanking new tractor that has not had a chance for the rings to seat yet?
I always feel like the fuel use numbers they have posted seem higher than real life experience!
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Nebraska Tractor Tests
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Nebraska Tractor Tests
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Re: Nebraska Tractor Tests
Here's a document that may shed some light. It's from 1981: https://www.researchgate.net/publicatio ... ctor_Tests
So in short, they don't just unload them and run the crap out of them right to start with. I would expect there's still some sort of break-in procedure as described here.
If anything, I think the test numbers should be lower especially for older, non-emissions models. It would be illegal to sell a tractor set at less than it's advertised HP, at least in NE, but on the other hand, if they are making more HP, it's ok. Many manufacturers were known back in the day to make their production models a little "saltier" than the published numbers. Lots of stories about the later IH diesels producing way more HP than what they were advertised at. I'm sure others did it too. I bet that today's models are closer to advertised, but I don't know.
Al
So in short, they don't just unload them and run the crap out of them right to start with. I would expect there's still some sort of break-in procedure as described here.
If anything, I think the test numbers should be lower especially for older, non-emissions models. It would be illegal to sell a tractor set at less than it's advertised HP, at least in NE, but on the other hand, if they are making more HP, it's ok. Many manufacturers were known back in the day to make their production models a little "saltier" than the published numbers. Lots of stories about the later IH diesels producing way more HP than what they were advertised at. I'm sure others did it too. I bet that today's models are closer to advertised, but I don't know.
Al
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- 501 Club
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Re: Nebraska Tractor Tests
From the linked article;
"The tractor is then limbered-up for three hours or more on drawbar work"
Hardly seems to be enough! Lol
"The tractor is then limbered-up for three hours or more on drawbar work"
Hardly seems to be enough! Lol
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Re: Nebraska Tractor Tests
In the older tests, there was a test A, that was intended mostly for limbering up and to give the manufacturer the opportunity to make any adjustments. I have never seen any details for test A or how long it lasted. The reports typically don't mention that test. As far as I know, there was no reason a manufacturer couldn't run a break-in procedure before bringing the tractor to the test lab. They were required to certify that the tractor brought in for testing conformed to the published specifications.
As I mentioned in another thread about fuel consumption, the reported figure is based on loading at 75% of maximum horsepower. In common use, tractors probably won't get near that use. Even if you exceed that while loaded, all the time spend turning around etc. will bring the average load down by a lot.
As I mentioned in another thread about fuel consumption, the reported figure is based on loading at 75% of maximum horsepower. In common use, tractors probably won't get near that use. Even if you exceed that while loaded, all the time spend turning around etc. will bring the average load down by a lot.
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