JD 5525 ePTO with pics

[ddivinia]

I know there was a thread on the ePTO and I could not find it. I was out working the 5525 today some and took some pics of the ePTO setup so people could see it.

The tach shows 540 RPM PTO at 2 different engine RPMS.

2 PTO levers: One to put it in ePTO or regular and the usual engagement lever.

D.

 

[JB4310]

So whats the e for, on JD's e is usually electronic?, maybe enhanced.
Or is it basically just a 2 speed pto with a fancy name, how much pto hp on the 5525? is there a separate pto hp rating when running at the 1700 rpms?

 

[ddivinia]

So whats the e for, on JD's e is usually electronic?, maybe enhanced.
Or is it basically just a 2 speed pto with a fancy name, how much pto hp on the 5525? is there a separate pto hp rating when running at the 1700 rpms?

In this case it stands are economy. Same PTO RPM with less engine RPMS. the 5525 is rated at 91HP, 75HP PTO. I do not know the HP rating when in ePTO mode. I am sure it is less.

A good example is when I run my HX-15 15' batwing - I run it in regular mode. With the MX-6, 6' mower, ePTO.

D.

 

[JB4310]

Thanks, it makes sense, the question always comes up when discussing pto generators, everyone wants to run the engines at lower rpms and still get the 540 just for that reason, economy, wear and tear, noise emissions. of course unless they have 2 speed ptos they can't with out some custom gear box, but even the ones with 2 speed ptos and a gen closely matched to their tractors pto hp rating, can't pull the full load when running at the slower engine rpms because of the lower hp issue.

For your tractors out put I'm sure you could still produce some high KWs even at the lower economy setting.

I'd be curious what the economy pto's setting's HP would be, just a wild guess maybe 40% less. Of course for there to be economy there has to be sacrifice, but that still leaves you with pretty substantial output, compared to smaller CUTs like mine.

 

[ddivinia]

Thanks, it makes sense, the question always comes up when discussing pto generators, everyone wants to run the engines at lower rpms and still get the 540 just for that reason, economy, wear and tear, noise emissions. of course unless they have 2 speed ptos they can't with out some custom gear box, but even the ones with 2 speed ptos and a gen closely matched to their tractors pto hp rating, can't pull the full load when running at the slower engine rpms because of the lower hp issue.

For your tractors out put I'm sure you could still produce some high KWs even at the lower economy setting.

I'd be curious what the economy pto's setting's HP would be, just a wild guess maybe 40% less. Of course for there to be economy there has to be sacrifice, but that still leaves you with pretty substantial output, compared to smaller CUTs like mine.

I wonder if the tractor had load match if that would fix it?

D.

 

[dsgsr]

Maybe one is for 540rpm and the higher 1000rpm?


David

 

[ddivinia]

Maybe one is for 540rpm and the higher 1000rpm?


David

Each is for 540RPM PTO with different engine speed.

D.

 

[CATMAN]

With the specs on the John Deere website and a little math, I came up with 76 PTO (75 HP Advertised) at 2401 RPM= Regular PTO. A little more than 67 HP at 1700 rpm (ePTO speed). Most new Diesel engines have "Hump HP curves" and increased torque rise(%) as the RPMs decrease from Rated or Advertised RPMs. You really don't lose all that much. Peak Torque on this engine is 1400 rpms(61.1 PTO HP), so one only has 300 rpms worth of "cushion" before the engine torque decreases and the engine then loses power reasonably quickly below peak torque rpm[in ePTO mode]. Hope this helps a little.

 

[AKfish]

Interesting... always learnin' on this site.

Now I have a better understanding of what the ePTO setup is all about and how it might play into different uses; i.e. runnin' a smaller mower or a gen set for a couple of days at a time!

AKfish

 

[ddivinia]

ePTO is a slick idea. As fuel prices rise, I think we all will be wondering how much power we really need. I bought a 4720 and I am beginning to think a 4120 probably would have done it.

D.

 

[Bob_Young]

Thanks, D., that second picture answers the question of the earlier thread.

E-PTO is a neat idea and I hope the competition catches on to it. One of the good things about diesels, as I understand, is that they pretty much burn just enough fuel to deliver the power demanded. A 90HP diesel doing work that only demands 50HP, will burn about the same fuel as a 50HP diesel doing the same work. So going smaller only saves the fuel that would be burned in hauling the extra weight of the larger tractor around. They're not like a gasoline engine that's highly dependent on a particular air/fuel mixture to run right and thus larger displacement at a given RPM automatically means greater fuel consumption, whether working hard or not.

Of course the demands of the new emission controls may mess this up. Don't understand how the geniuses behind controlling emissions can sacrifice fuel economy in the name of lowered emissions and view it as a net gain. This seems to be what's happened with the diesel pickups. May be a subject for a seperate thread.
Bob

 

[ddivinia]

Thanks, D., that second picture answers the question of the earlier thread.

Bob

No problem. I think we will see more economy saving items on tractors. I saw a receipt for 2007 for $2.55 a gallon for farm diesel. Man, that seemed high at the time but I would like to buy it for that now...

D.

 

[Dargo]

ePTO is a slick idea. As fuel prices rise, I think we all will be wondering how much power we really need. I bought a 4720 and I am beginning to think a 4120 probably would have done it.

D.

I don't have the big batwing like you have, but I've found that my tractor seems to turn everything I own just fine in the "e" setting. I really wondered about whether it would turn my big tiller at full depth while in "economy" mode, but it seems to do just fine. I only seem to need the full HP when doing heavy loader work.

 

[ddivinia]

I don't have the big batwing like you have, but I've found that my tractor seems to turn everything I own just fine in the "e" setting. I really wondered about whether it would turn my big tiller at full depth while in "economy" mode, but it seems to do just fine. I only seem to need the full HP when doing heavy loader work.

You are right. I can run pretty much all my smaller stuff on ePTO mode. Batwing requires full power. Baler also requires it.

I think the ePTO thing is a really slick deal. I bet we see it come out in more machines.

D.

 

[4720 OWNER]

So are you running your baler behind the 4720?

 

[ddivinia]

So are you running your baler behind the 4720?

No, the 4720 will be raking.

5525 will be cutting and baling. I am going to use a mower caddy so the 4720 could cut, but I like the safety of a cab.

Wife wants a 4720 cab for raking, etc...

D.

 

[wkpoor]

This PTO thing is not new. My 95 JD5400 has it also. Until I read this thread I never could figure out why there was 2 540 labels on the tach with several 100 RPM spread. Seemed to me PTO RPM would be linear with the engine.

 

[ddivinia]

This PTO thing is not new. My 95 JD5400 has it also. Until I read this thread I never could figure out why there was 2 540 labels on the tach with several 100 RPM spread. Seemed to me PTO RPM would be linear with the engine.

I have to throw a lever and it uses a different gear to engage the PTO shaft. Thus a different engine RPM will maintain the 540 RPM PTO output.

D.

 

[wkpoor]

I also throw a lever down to engage the PTO through its own set of gears. I noticed my tach does say 540e on the 1700RPM mark.