New tractors on the dyno. Which brand does best?

[daugen]

I wouldn't be surprised if many of the tractors marketed to squeak under the 26hp emission tier are actually a bit stronger than 26hp because there are many customers that want the strongest running non-DPF (or other emission control) tractor.

Good point.
you can get a lot of tractor with 26hp:
https://www.kubotausa.com/products/tractors/compact/b50#specifications
note the very large drop in power to the pto, percentage wise

Jeff: you sure of that? Does this B50 require blue def? going to check

 

[jeff9366]

I am sure Tier IV is mandatory at 25-horsepower, not 26-horsepower. All the "cheater" engines are 24.2, 24.6, 24.8 horsepower. Kubota uses DPF (diesel particulate filters.) technology on Tier IV compact tractor engines, with excepton of B2650. No blue DEF.

Most feel less stringent emission standards for <25 horsepower tractors are permanent. Personally, I feel this dispensation is temporary, probably disappearing when cleaner Tier V standards arrive.

I cannot write about Kubota's 100+ horsepower models. My dealer does not stock them. Deere owns the 100+ horsepower tractor market in North Florida because Kubotas in that high power range are too light. Kubota dealers have ranted to Kubota about this for years, but Kubota does not seem to get it.

RE B50s: Kubota's paper catalog states: "Diesel Particulate Filter (DPF) is compliant with the latest Tier 4 Final emission regulations (B3350)." B2650 is compliant too but apparently without needing a DPF. This may or may not be due to B2650's smaller 77 cubic inch engine, viz 91.5 cubic inch engine in B3350.

I am not involved with Kubota, other than as a consumer. I try to keep current on what Kubota is doing and how Kubota is doing it but it is difficult as Kubota constantly introduces minor changes, mostly improvements. Kubota catalogs and brochures often are a bit behind what is on dealer lots.

 

[big bubba]

so i assume these tractor hp dyno tests are made at the rear wheel, & not @ the flywheel as some auto manufacturers rate their hp? can be quite a difference i think. just asking thanks in advance

 

[daugen]

Thanks Jeff. Kubota always took the you can add weight approach, and the response is, yeah, so can they...
They just don't need super heavy tractors in the Asian market, but that's not world market big ag. Big ag wants weight for more traction to pull
humongous field implements. Everyone seems to want a Big Bud...

If Kubota can make special SU models, low profile, etc, why not make a 7 series with more weight built in, even if it's just making optional weight standard.
but that goes off topic

 

[Grandad4]

A few minutes of fact checking indicates a few things said here need clearing up:

1. All of the Kubota M5 and M7 series have been tested at the Nebraska lab: Other Manufacturers | Tractor Test Lab | Nebraska

2. The Kubota ag equipment is competitive regarding weight and performance:

Kubota M-171
__________________
Rated Engine HP: 168
Rated PTO HP: 140
Nebraska PTO HP: 148.6
Shipping weight per Manufacturer: 15,097 lb
"Unladen Tractor Mass" as tested at Nebraska Lab: 17,475 lb
Sources:
https://www.kubotausa.com/products/tractors/agriculture/m7#specifications
https://tractortestlab.unl.edu/Kubota M7-171.pdf

John Deere 6175M
___________________
Rated Engine HP: 175
Rated PTO HP: 142
Nebraska PTO HP: 167.4
Shipping weight per Manufacturer: 15,664 lb
"Unladen Tractor Mass" as tested at Nebraska Lab: 17,150 lb
Sources:
Row-Crop Tractors | 6175M | John Deere US
https://tractortestlab.unl.edu/John Deere 6175M.pdf

 

[wagne223]

I have had many tractors over the years. Most have been on the dyno one time or another. I will be looking for something in the 75 pto hp range. If a certain brand runs 5 under and another brand runs 5 over that is a big difference for the money. I do not want to have to purchase 85 pto hp to make sure I get 75. The Nebraska charts are nice and I had forgotten about them. Thanks above for the reminder. I was hoping to see something for Kubota but nothing really there.

I dont see how you would notice minor changes is power performing typical tractor tasks. I also understand that just because I dont understand it, does not make it so for you. Since it is important to you, I would like to add the following.....

If you absolutely must have minium 75 hp at the PTO, then you should buy a tractor that is rated higher to be safe.

One important piece of information missing from the discussion is the effect of weather conditions. In any testing, they have to note the weather. You need to consider the test conditions compared to your typical operating conditions.

Altitude ,temperature and humidity can have a significant effect on a naturally aspirated engine.

Of course a turbo reduces the weather effect drastically.

Just something else to consider.

 

[Sawyer Rob]

Thanks Jeff. Kubota always took the you can add weight approach, and the response is, yeah, so can they...

I was in a Kubota dealership one time and they insisted that a Kubota would pull just as big a load as my AGCO, even though their "M" series Kubota was 1,000 pounds lighter!

He said "I can add 1K to our Kubota" and I said "I can add 1K to my AGCO too"... Then he insisted the reason a Kubota can pull just as much or more than a heavier tractor, was because of their "advance in engineering". They were engineered much better than the other makers, so as to pull better than the other makes!

At that point I had, had enough! So I told him that I would bring my AGCO to his place with NO added weight, not even loaded tires and we could pull it against his "superior" new Kubota. The winner owns BOTH tractors free and clear!!

That's when he decided to do some serous back tracking!!!

A thousand pounds is a HUGE advantage!! Dang! I almost had a FREE Kubota!! lol

SR

 

[Timm250]

Bought a new Kubota M6800 in 2001. Specs were 68 engine & 62 pto hp.

In 2002 I bought a new Hesston 845 baler. The baler needed 58 hp to operate & it would bog the tractor down to the point the dealer was going to take the baler back.

We the put the baler on a Ford 4610 which was supposed to be 58hp & it pulled the baler with no problems.

After talking with both dealers I asked the Kubota dealer to dyno the M6800 & it dynoed at 56 pto hp.

The dealer turned the fuel up & dynoed again until we got 68 pto hp.

After that there were no more problems operating the baler.

Later in 2002 my brother in law bought a new M6800. He had it dynoed before they delivered it & it was @ 55hp.

 

[Industrial Toys]

Our JD 6200 tested quite a bit higher on the Dyno than spec.

I think all new tractors should sit on the Dyno for eight or so hours. I bet many would be towed back to the factory for repairs. Bet many would be sitting in a puddle of oil.

 

[buickanddeere]

I am comparing tractors of all colors and wondering if anyone has put an almost new tractor on the dyno to see how it did against it's specs? I wonder if any brands cheat it a little bit.

Why the worry ? The Nebraska tests exist for a reason .