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Diesel consumption for John Deere 5425

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Duane Lindsey

12-21-2007 19:15:26

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According to the Nebraska tractor test for the John Deere 5425, the number of gallons of fuel used is 4.68 gallons per hour. Is that fuel useage correct for this tractor during normal operations like cutting hay and pulling a baler? Thanks for any information! Duane

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Bill(Wis)

12-22-2007 11:22:53

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-21-2007 19:15:26

It will be some time before the Nebraska Test info (done in Japan) becomes available for the Kubota 7040. However, the Nebraska Test info on the Kubota M6800 is available. Same engine, basically the same tractor. I happen to have an M6800 and the hardest job I give it is pulling a three shank Brillion subsoiler 18" deep in third gear and 1900 RPM. After doing this every fall for six years the tractor uses exactly 2.22222 gallons of premium diesel fuel per hour every time. The tractor has averaged 1.33 gal per hour since I've owned it. One advantage of the Kubota line is that they are lighter than the JD, NH, CIHs, etc. and will burn less fuel doing the lighter jobs. You can always make them heavier when needed. For example, I leave the loader on when doing the heavier pulling jobs and throw field rocks in it that turn up as I go along. I'm right up around the 125 lbs per HP then and it works out fine.

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Duane Lindsey

12-22-2007 19:12:24

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Re: Diesel consumption for John Deere 5425 in reply to Bill(Wis), 12-22-2007 11:22:53

Bill: Thanks again for the additional information.You seem very knowledgeable on tractors. The salespamphlet for the 7040 says it has a new engine, a 203 cubic inch, with something call a center direct injection; but you think it is the same engine that has been in the M6800 tractors? That is very interesting. If you were guessing, what horse power do you think you are using to do the ripping with the three shank subsoiler? Around here, it would take a lot of power to pull a subsoiler 18 inches deep. Sounds like pulling the subsoiler would require greater horse power than cutting hay with an eight foot cutter or baling hay with a 375 JD baler, which makes a thousand pound roll. Is your M6800 a two wheel drive?

Again, if I understand the Nebraska Tractor test varying power and fuel consumption test, for the excellent fuel use you are getting, the test shows you would be using less than 27.5 HP at 2.36 gal/hr. I think you are using much higher HP than that, right? I believe I am not totally understanding the test results. Are you able to carry ballast in your rear tires in Wisconsin? Down here, we use it to increase the tractor weight. If I understand you, as long as your tractor and/or tractor loader weight is 125 ponds per HP; then that is sufficient weight for most jobs. Is that correct? I am glad to know that.

I thought all test had to be done in Nebraska at University of Nebraska until I looked at the test results for the M6800. I certainly did not think they would allow them to be performed in Japan. I have gained a lot of knowledge from your replies.

I sincerly thank you for your reply. Duane

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Bill(Wis)

12-23-2007 06:35:58

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-22-2007 19:12:24

In absense of test data, a comparable Kubota model would be the M6800 with it's 202 cu in engine and 62 PTO HP. The M7040 has been improved, no doubt, however if you compare the specs, side by side, they are very similar tractors. I have a Brillion 3 point double frame 3 shank subsoiler as shown on their webpages. Three point helps a lot. Harry Ferguson was right. I was not able to go any deeper than 10 to 12 inches on my first attempt on fields that were severly compacted. Our soils here are the result of glacial action and are not uniform. We have red clay knolls that defy description in toughness and yet grow good crops. Also clay loam, sandy loam and heavy black bottom land. All in the same field. I had doubts about even being able to pull three shanks when I bought the subsoiler. Now, after six years, I can go down 17 to 18 inces anywhere. I carry a yard stick and check depth and also visually check depth of shanks. I do this in the fall. My M6800 has MFWD and it needs it to do this. The only added weight is the loader and whatever it has in it in the form of picked up field stones along the way and the mechanical advantage of a mounted implement with draft control. The HP required cannot be reverse computed from the test data because they only did the test at a much higher RPM than I use. I've never had my M6800 as high as 2700 RPM. Note that 540 PTO comes in at 2295 eng RPM. They did not record a test at a lower RPM as, for example, done in the test of the John Deere 6403. In that test you'll see where shifting to a higher gear and reducing RPM resulted in the same HP, same ground speed, same wheel slip and less fuel usage (4.432 gph vs 3.99 gph). There was much less difference in their RPMs (2175 vs 1746) than in my case (2707 vs 1900). Yes, I know I'm using more than 27.5 HP so the better fuel efficiency is coming from operating the engine at 1900 RPM. Right in front of the torque bulge. As far as the recommended 125 lbs per HP, that is a recommended figure from a dandy little pamphlet available at your friendly John Deere dealer entitled, "Optimizing Tractor Performance".

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Duane Lindsey

12-23-2007 19:07:33

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Re: Diesel consumption for John Deere 5425 in reply to Bill(Wis), 12-23-2007 06:35:58

Bill(Wis): Thank you again for your insight. I went to the test results on the John Deere 6403, and I see what you are referring to. I found it very interesting in your reference to your soils. It is amazing to me that repeated subsoiling can break-up soils with clay subsoils to an 18" dept. I am a forester, so I have a great interest in soils; and on my off time, I enjoy raising cows. I only have 25 mother cows, but it takes up most of my time messing with cows on my time off.

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Duane Lindsey

12-22-2007 11:07:07

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-21-2007 19:15:26

Thanks to all of you for your responses and information. It has helped me a lot.
I've added some other comments and questions under each one of your responses.
I'd appreciate your checking those. Thanks! Duane

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Texasmark

12-22-2007 07:30:24

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-21-2007 19:15:26

Just bought a Branson with a 4 cyl B3.3 Cummins engine built by Komatsu in Japan. The fuel consumption posted is .083 gal/hp/hr. That pretty much says it. If you aren't using the ponies you don't have to feed them.

Have some 3 and 4 cyl older Fords that do real good too. Don't have any numbers, but you get the feel for how much it costs to do different jobs. Course when these are on E you are only talking about 15 gallons to fill er up.

But my Deere is a thirsty critter; easy to empty that 45 gallon tank regardless of what I'm doing. Course it's roughly twice the hp of the others and it is on a big frame (rowcrop) with cab so you have to pay the bill to move all that weight around.

So it sits in the shed till I bale hay (JD 530 baler requires min 70 hp and it's 100) or do my initial plowing for the season.

This little Branson is going to be the farm workhorse and the size is just right for most jobs around the place; 57 pto hp. Cab, loader, and 4wd just make the deal sweater.

Mark

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Duane Lindsey

12-22-2007 11:08:58

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Re: Diesel consumption for John Deere 5425 in reply to Texasmark, 12-22-2007 07:30:24

Texasmark: The John Deere I am looking at on the varying power and fuel consumption shows at 66.25 pto horsepower 14.15 hp.hr./gal, and if I am doing the conversion correctly that equals .07 gals/hp/hr. This is a 2 wheel drive tractor. I was also looking at a 7040 Kuobta 2 wheel drive that is a 68 engine 62 pto horsepower, but it is a new model so they do not have the Nebrasha test. I have a 11 year old Ford 5030 that is 62 pto horse power. It uses about 2-2.5 gal/hour cutting and baling hay. I have a eight foot cutter and a 375 JD baler. Diesel is getting close to $3.00 per gallon here, so I am wanting to buy something that would be as fuel efficient as possible but get the job done. There are no Branson dealers here. If there was, I might be interested in looking at them. I know Komatso makes good products. Thanks for your reply.

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Texasmark

12-23-2007 07:03:28

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-22-2007 11:08:58

Not flaunting Branson, but back in April I started looking for a 4wd tractor after our monsoon spring and getting current tractors stuck in the lot with all the mud and muck trying to put out round bales.

I wanted a mid range tractor and needed a cab for health (and convenience) reasons, and if I had the 4wd front end, that would surely be the tractor to have the loader on.....already had a loader on a 4010 Deere which I was ready to pass on to someone else.

I started shopping the local dealers in green, blue, red, another red, the other (dark, import) green, another blue, and all that (didn't shop Kabota as I just always thought they were ugly....personal opinion...don't jump me about it, and they were like 50 miles away).

I got quotes and catalogs and all and had about given up on the idea because they just didn't have what was right for me, when one day I was driving down the road (about 25 miles away) and saw a lineup of shiny red tractors that really had some eye appeal.....this was mid-September.

A test drive, explanation of all the "standard" whistles and bells and I was sold. To boot, the dealer took 3 of my old tractors (including the 4010) in trade and when he offered that, I wanted to know where do I sign. Grin.

Good luck,

Mark

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Duane Lindsey

12-23-2007 19:11:02

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Re: Diesel consumption for John Deere 5425 in reply to Texasmark, 12-23-2007 07:03:28

Texasmark: I appreciate you taking the time to reply again. I found it interesting how you came to buy your Branson. I was wondering with you having owned John Deere tractors in the past, why you did not buy another? You have used them, it sounds like, on a large scale operation. I have talked to two people that have told me that John Deere (mid-size) are not as dependable as they were in past models, and I was wondering if that was your problem? I wish I knew if there was a Branson dealer in south Arkansas or north Louisiana I would be interested in looking at them. Thanks again.

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Bill(Wis)

12-22-2007 05:15:59

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-21-2007 19:15:26

The 4.68 fuel consumption number came in at the tractor's full rated 66.25 PTO HP output. At 30.42 HP (less than half of it's full output) it was burning 3.25 gph, or more than half what it was burning at full output. It is perfectly normal for most engines of this type to become more fuel efficient as they get closer to their full rated HP output and less fuel efficient at the lower loads. Some tractors are very fuel efficient at high loads and very fuel inefficient at lower loads. I personally think the Japanese engines are more fuel efficient throughout the entire load range than anyone else although that may be changing with the newer electronic fuel controls.

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Duane Lindsey

12-22-2007 11:10:22

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Re: Diesel consumption for John Deere 5425 in reply to Bill(Wis), 12-22-2007 05:15:59

Bill : I appreciate you taking the time to look up the test results. I see what you are talking about now, but I do not understand the why. I am also looking at a 7040 2 wheel drive Kubota, but it is a new model and there is no test results. I was wanting the best tractor in the 62 pto horsepower range. I thought the John Deere was probably the best tractor. It is made in America. I have a 11 year old Ford that is 62 pto hp. Thanks for your information.

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MSM

12-21-2007 20:17:24

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Re: Diesel consumption for John Deere 5425 in reply to Duane Lindsey, 12-21-2007 19:15:26

That is fuel consumption at rated horsepower.Since mowing or baling is only using a third to half of the rated power,your consumption should only be 1/3-1/2 of the stated amount,in theory.

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Duane Lindsey

12-22-2007 11:12:04

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Re: Diesel consumption for John Deere 5425 in reply to MSM, 12-21-2007 20:17:24

MSM: Thanks you for taking the time to reply. The way you are looking at the consumption in theory is the way I was wondering if it would be.

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RAB

12-21-2007 23:04:26

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Re: Diesel consumption for John Deere 5425 in reply to MSM, 12-21-2007 20:17:24

Not quite, as the tractor still has to operate itself in the low power output periods - even doing no work it will still require fuel. Battery charging, water pump, any other parasitic loads all add up as a base fuel load and at pto engine speed as well.

Regards, RAB

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Duane Lindsey

12-22-2007 11:13:06

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Re: Diesel consumption for John Deere 5425 in reply to RAB, 12-21-2007 23:04:26

RAB: I appreciate your reply I see what you are talking about. There a consistent load on the engine at all times. Thanks.

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