RPM's while working

[whistlepig]

I run the PTO equipment at 540 PTO RPM. For loader work I run the engine at the RPM that makes the loader work smoothly. Too low engine RPM makes the loader work slowly. Too fast engine RPM makes the loader work "jerky". I run about 1800 engine RPM for loader work.

 

[greg_g]

I see construction equipment, backhoes excavators mills all run at full throttle year at year with thousands of hours on them used hard and they just keep going!

Yup. Same with generators and pumps

//greg//

 

[RoyJackson]

I run the PTO equipment at 540 PTO RPM. For loader work I run the engine at the RPM that makes the loader work smoothly. Too low engine RPM makes the loader work slowly. Too fast engine RPM makes the loader work "jerky". I run about 1800 engine RPM for loader work.

Same here...and if I need a bit more for a short time, I use the foot throttle.

 

[US American]

These machines are designed to run at PTO 540 speeds for their entire lives. If I am running PTO driven equipment I keep it close to 540. If not, I am usually between 1800-2200 (PTO 540 for me is 2400). You do not want to make a habit of running at too low of an rpm. That can stress systems other than the motor (or so I am told).

And remember not to lug (as has been stated). So long as you can increase rpms by adding throttle even when under the harshest loads you should be fine. My .02

 

[FishHaggis]

I used to do a lot of on-the-water work and with an outboard engine, I used to warm her up, then put it full out and then back off a titch. It was the best way to run those outboard engines.

I asked the question about RPM's here because this past fall when doing work at 540 PTO RPM I had to put my 2320 at full throttle. Sounds like I don't have to from what I see on this post. I guess I will learn the feel of the tractor and when it starts to bind or struggle, up the RPM.

I was starting to feel weird about running that tractor at full throttle for extended periods of time but I was worried about messing up gears or lubrications with lower RPM's.

 

[dmay]

In general I find all engines live longer, happier lives when throttled back from full throttle. On my tractor I set the speed at the RPM rated position when snowblowing. I can encounter heavy drifts that can certainly bog the engine down. My guess is if I jammed it full throttle and just pushed forward something expensive might occur. I prefer to let this be an indication I'm pushing too hard and slow down to let the blower work through clearing the snow.

 

[RoyJackson]

I asked the question about RPM's here because this past fall when doing work at 540 PTO RPM I had to put my 2320 at full throttle.

Is the PTO mark at full throttle? I don't have a 2320, so I don't know.
All three of the tractors I've owned had the PTO mark (on the tach) a few hundred RPM below full RPM.

 

[FishHaggis]

Thats a good point. My 2320 is at full throttle to get it to 540 RPM on the PTO............ Any other 2320's out there different?

 

[AKfish]

The 3,000 rpm is the "rated" rpm per the Deere spec sheet that JD also uses to list the HP and Torque levels for that particular Yanmar engine.

It's 170 rpm's below the upper end of the operating range of 1,270-3,170 rpm's listed by Deere.

So, operating your tractor a 3k for pto operation is still below the upper operating range.

AKfish

 

[PCABE5]

I asked the question about RPM's here because this past fall when doing work at 540 PTO RPM I had to put my 2320 at full throttle. Sounds like I don't have to from what I see on this post. I guess I will learn the feel of the tractor and when it starts to bind or struggle, up the RPM.

Your 540 or mid-2000 pto's won't work properly or efficiently if not run at pto speed (not saying they won't just the way their designed). You mention mowing in HI at reduced rpm. Watch your grass as that will tell you if your ok, at lower rpm your blade tip speed is reduced so your travel speed would have to be slower to make a clean cut. I do acres so I run mine for hours at pto and in HI to mow.

Take a tiller for example it was designed to do it's job properly at 540. Can it do it at a slower speed, yes but you have to do other things in order for it to do it as properly and efficiently as if it were at 540.

I was starting to feel weird about running that tractor at full throttle for extended periods of time but I was worried about messing up gears or lubrications with lower RPM's.

Full throttle will not hurt your engine. It will run for more hours than you will probably own it for at full throttle. But you can definitly do a lot of work at lower rpm's. All your lube pressures and volumes would be just fine at lower rpm's. If you were watching gauges the only thing you would see with rpm's is hydraulic volume change, pressure is constant, and oil pressure rise in the engine.


The 2320 is 3000 rpm for pto and JD rated hp. It will rev to 3170-3200 rpm's at full throttle which is where Yanmar's rated hp for this engine family is at.