Oil & Fuel Fuel consumption on a 2320

[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?