fuel use?? diesel tractors

Anonymous-0 · Dec 11, 2010

My little 26 HP (3cyl 1.8 liter motor) tractor for my purposes gets about 12 hours of operation on 8 gallons of fuel. just ran across a 67 HP that is a little more than I wanted but priced better than the 40-50HP stuff around. It has a D239 motor (IHC 3.9 liter 4cyl). Can I expect it to use twice as much fuel? Little tractor is indirect injection and bigger is direct if it makes a difference. Just curious.

Dave

bison · Dec 11, 2010

i got a 105 hp 4 cyl perkins in my compact tracksteer loader,it has no problem slurping 26 gal in an 8 hr day.This engine has only 500 some hrs on it.

Bruce from Can. · Dec 12, 2010

From my experience Dave the larger tractor will only use a modest amount more fuel under light load . But under heavy load , when you are calling on all the horses to pull , yes it will need to be fed.

showcrop · Dec 12, 2010

Dave, the key to it is the governor. It doesn't open up until you put a load on it, so like Bruce says doing light work it will consume only very slightly more. If you put a good load on it, which it appears would be rare in your situation, it will use considerably more per hour, but it will be getting proportionately more done than your current tractor.

Anonymous-0 · Dec 12, 2010

Closest I can compare is with a 38hp 3-cylinder diesel vs 60hp 4-cylinder diesel I have. 60hp tractor will use roughly 2-1/2 times the fuel doing same chores. The ONLY way the 60 hp tractor wins out is when doing something where 38hp simply isn't enough hp.

buickanddeere · Dec 12, 2010

Any diesel engine, gas turbine or boiler. Suffers
from low efficiency at partial loads.
If using an oversize engine. Run it at peak torque
rpms and make it work but not lug.

JDemaris · Dec 12, 2010

Here are two non-turbo diesels to compare. Granted they are both direct-injected - but having IDI is only going to make a slight change to the worse.

105 c.i. Deere/Yanmar 950 tractor, direct injected . .

28 horse at 1.9 GPH
24 horse at 1.6 GPH
18.4 horse at 1.3 GPH
15 horse at 1.2 GPH
12 horse at 1 GPH

239 c.i. direct injected in a
MF 175 with a 236 Perkins

28 horse at 2 GPH
14 horse at 1.4 GPH

Paul Janke · Dec 12, 2010

I think a bigger issue than the size of the engine is the size of the tractor. Moving more weight around takes more energy. I would think that the fuel use may be close to the same for stationary PTO work, but a tractor which weighs twice as much is going to take more fuel to move than the lighter one, probably even more so when on soft surfaces.

Roy in UK · Dec 12, 2010

1004 Perkins? We had one in a Matbro TR250 Telescopic Handler. I agree with you, they are thirsty!

rustyfarmall · Dec 12, 2010

(quoted from post at 22:26:48 12/11/10) My little 26 HP (3cyl 1.8 liter motor) tractor for my purposes gets about 12 hours of operation on 8 gallons of fuel. just ran across a 67 HP that is a little more than I wanted but priced better than the 40-50HP stuff around. It has a D239 motor (IHC 3.9 liter 4cyl). Can I expect it to use twice as much fuel? Little tractor is indirect injection and bigger is direct if it makes a difference. Just curious.

Dave

Your 26 HP tractor is probably giving pretty much all it has most of the time. The 67 HP tractor will be more or less just loafing most of the time, and might actually be more fuel efficient than the small tractor while doing the same work. The amount of fuel consumed will always be in direct relation to the amount of work being done.

charlie n · Dec 12, 2010

try this formula. max. fly wheel hp x .35= gallons per hour.

buickanddeere · Dec 12, 2010

How does that work? Diesel tractors run from
between 12 to 20HP per hour per US gallon of fuel at
full load.

karl f · Dec 12, 2010

similar horsepower tractor and same engine as a 685 case ih, and i think a 684 or 674 IH in the USA. Try finding the Nebraska results for any of those models and you will get the idea.

Karl f

Tom-TX · Dec 12, 2010

Hey Charlie,
better look again at your formula. If I used it then my 67 PTO HP on my MF-690 Perkins would burn 67 x 0.35 = 23 gallond per hour !! Huh, I dont think my ole 4 cylinder Perkins and CAV pump can put that much through. Post back aftr looking up your formula again. Tom

fuel use?? diesel tractors

Anonymous-0

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bison

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Bruce from Can.

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showcrop

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Anonymous-0

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