Oil & Fuel Fuel consumption on a 2320

[bxowner]

I'm going through diesel like crazy - and at 3.997 a gallon, it's getting expensive. I have 18 hours - and have filled the tank several times. If I had to guess, I'd say I've gone through 18 gallons in that time.

I bought a 6 cyl car two years ago. It only averaged 20 mpg until I racked up about 7000 miles on it. Then the avg. jumped to 27 mpg.

Should I expect the same of the tractor? i.e. after 50 hours, the fuel consumption will drop significantly?

No, it's not leaking. Nor am I running it hard - just idling it for 5 minutes to warm up, then at 2500 rpm for snow removal.

 

[wxboy]

I've got a 2305 which has the same engine as the 2320 and I noticed that the fuel economy did seem to improve around the time of my 50 hour service. Not sure if the service helped or it was just getting broken in around that time but it did seem to get better. Also I assume a diesel is similar to a gas engine where it will get better fuel economy in warmer weather. I would say that my average fuel consumption when mowing is approximately .75 gallons per hour. I mow at around 2400-2500 rpm, not at rated pto speed.

Hopefully your machine will show the same improvement that mine did.

 

[Neil Clemmons]

I only have 8 hours on a 2320 and have gone through about 8 gallons, so your gallon per hour experience is similar to mine.

neil

 

[ragkar]

I'm running a gallon an hour at 100 hours.

 

[RalphVa]

Early on, my 4010 was running about 0.54 gallon/hr. Overall, it's averaging 0.46 gallon/hr.

The figures I see on the 2320 is why I hope that they come out with another, say 1820, before I want to replace my 18.5 hp 4010. That likely won't be until about 2014 or so. So, maybe JD will catch on to the fact that diesel is about double the price of only a couple years ago by that time.

Ralph

 

[mtrim]

2305 here. I have found that running at less than PTO rated speed, even when mowing, makes a really big difference in my fuel usage. If I set the engine speed at around 2500-2600 rpm, I notice no difference in routine mowing, but use at lease 1/3 less fuel. When doing non-mowing chores such as snow removal, spreading manure, light loader work, I like to run at around 2100 rpm. Yes, the loader does work slowly, but if I'm not working the thing really hard, it saves a lot of fuel.

 

[kvjohndeere]

I have 16 hours on my 2320 Iam happy with the fuel economy Plus The diesel Is so quiet ! I have only burnt around 8 galllons in mine Thats Plowing Mulching leaves lugging trees around Plus Tilling & discing Gardens To me It burns less than my 2305 !I keep A chart On mine when I put fuel in it & The hours ! The last time I put fuel in mine was March 2 & I only burned A half a tank ! I think that is pretty good !

 

[Engine_Tech]

Economy and overall engine performance will get better as the engine breaks in and the rings seat. It's amazing to watch a new tractor on a dyno pull one max HP, then 30-min later pull several more HP, and so on as it breaks in. The best thing you can do for a new tractor is hook up something to the PTO and work the snot out of it.

 

[mkoreen]

I have 3 hours on my new 2305, and have used almost 3 gallons.... 1-1 ratio.. hope it improves for mowing season with diesel at$4.29/gal in Pittsburgh!

 

[randyvl]

go to jd page, click on 2320 specs and scroll down to

Fuel System

Type ---

Injection Pump Type Indirect Injection

U.S. gal./hr (L/hr) @ 100% load* 1.6 (6.1)

*Fuel consumption rate should be used for comparison purposes only. ---

 

[bxowner]

randyvl -

That's my concern. According to JD's stat's, I'm getting about half the economy as I should - as I mentioned, I'm running at about 2500 most of the time, not "100%", and I'm not getting anywhere near the 1.6 gal/hr. rating.

If I bought a Toyota Prius that was supposed to average 40 mpg - and was only getting 20 mpg, I'd be pretty concerned.

Should I be as concerned with this motor? Am I not breaking it in properly - like Engine-Tech suggests? Would it help to 'seat the rings' by running it harder?

 

[wxboy]

You are doing better than the fuel consumption rating, not worse. You are using 1 gallon per hour vs. 1.6(less is better). The reason you are doing better than the rating is because you are not running the machine at 100% load. It's a worst case scenario.

 

[bxowner]

This is an example of why I fear the day that my children ask me to help them with their math homework.

 

[PCABE5]

My understanding of agricultural applications is that the standard of PTO ratings is used for load and fuel consumption and the JD specs for 1.6 gal/hr are at 3000 rpm plus a 100% load at the PTO. What makes 100% load at 3000 rpm? Your guess is as good as mine. Would make sense that as rpm's decrease the definition of 100% load would change with rpm's as well because of the ability to work is decreased.

My assumption is that 100% PTO load is equal to the force or load that is applied to the PTO just before rpm reduction occurs and then that load/force is equal to 100% load. Maybe someone else can answer that definition of load because that is just my thought on the measure.

Temperature plays a big factor, at -15F this winter I went thru almost 1/2 tank in an hour moving snow. In the summer when I mow, it takes me 4 hours to mow my yard, and I run at 3000 rpms and I burn less than 4 gallons of fuel. But that can change with the lenght of the grass and whether I am mowing or my wife is mowing (she uses more fuel).

On mine I noticed a change after 100 hours. What was said before is that you have to work it to break it in or the break-in period is prolonged. Diesel ring sets are tougher to break-in and take longer to do so. Which is a good thing.

 

[BigD9]

This is an example of why I fear the day that my children ask me to help them with their math homework.

Hang in there. If it was like my experience teaching my kids math, it will be a disaster anyway. They don't teach math in school anything like we learned it. The first time you attempt to help your kids you will probably get the dreaded "that's not the way Miss So in So does it in class" Then your child will walk away muttering something like "I knew he didn't know how to do this stuff."

 

[billb3]

2520 with 9.6 hours
finally bought some diesel, 4.76 gallons (@$4.19/gal)
filled the tractor's tank within a cupful.

so I've used about 4 3/4 gallons for my first 9.6 hours. Mostly backhoe work, some FEL. Found I really didn't need more than 1500 rpm.
roughly 2 hours per gallon.

 

[PCABE5]

A friend of mine sent me a perfomance output graph for the Yanmar 3TNV76 and it shows the fuel consumption (b.s.f.c.), torque curve and hp curve for our motor. Hope this helps.

 

[thatguy]

A friend of mine sent me a perfomance output graph for the Yanmar 3TNV76 and it shows the fuel consumption (b.s.f.c.), torque curve and hp curve for our motor. Hope this helps.

OK.. I have to admit it.. I NEED HELP understanding that graph.. What are each of the lines mean (except for torque im lost)..

thanks

Brian

 

[PCABE5]

The first line (starting from the bottom) is the fuel consumption and is labeled BFSC. This is measured in g/kwh and the low point is about 250 grams/kwh.

The next line up is labeled output and it is the measure of horsepower but is calculated in kw. The high point is about 18.7kw.

The last line is torque and is labeled in N-M and the max is about 65n-m.

Then you have to do the math to convert all this to US measures and from what I come up with:

BFSC = best fuel consumption ~ 250g/kwh is .058 gal/hph 2000rpm

Output = ~ 18.7kwh is 25.1 hp

Torque = ~ 65 N-m is 47.9 ft/lbs

If I do the other calculations right I come up with about 1.6 gal/h at 3000rpm and 1.05 gal/h at 2000rpm.

If I made a math error someone please correct me. Also note that this graph is based on 100% load so if your load changes so does your consumption. John Deere website had said mowing was approx. 75% load for a 3520 so lets say it is the same for a 2320 and your fuel useage goes down with the decreased load.

 

[AKKubota]

Can someone post a chart like that for the 2520?