I didn't mean that *you* were twisting things, just maybe getting slightly away from the original discussion. No offense meant. But in the original post, he was discussing doing loader work...not running the PTO. I've stated since the beginning that PTO operation needs to be at or very near wide open. 1500 RPM is definitely going to run the loader slower, but it isn't harmful to do so. And I disagree with the notion that you said of "Diesel engines are made to run at I always do at least 85% of max rpm for good performance of the engine..." since clearly the on-road diesel trucks run at much lower RPM and perform just fine without running wide open, or even 85% wide open.
RPMS Non DPF
- Thread starter Creature Meadow
- Start date
A question for all the guys discussing appropriate RPM's.
At what RPM do you run your post hole digger? I'm guessing you slow it down a tad!
At what RPM do you run your post hole digger? I'm guessing you slow it down a tad!
Creature Meadow
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For the WOT folks. Why does my tractor have a 540E and a regular 540?
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Creature Meadow
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I found this explanation on the John Deere site, maybe this helps explain as I'm sure the Big K does about the same. Just did not find anything on Kubota site real quick, at work.....
The 540/540 Economy PTO allows operators to select the engine rpm needed for their power take-off (PTO) application.
The economy position provides 540 rpm to the PTO at 1700 engine rpm. The 540 Economy is ideal for any PTO application, from running a mower conditioner to a baler or a cutter, where full horsepower is not needed.
Operating at lower engine rpm decreases fuel costs during tasks. The overall operating experience improves because there is less noise and vibration for the operator.
A lever allows the operator to simply change between 540 and 540E when conditions merit the opportunity to save fuel without affecting performance.
For heavy-duty operations requiring maximum PTO power, the PTO shift lever is placed in the 540 position, the PTO is engaged, and the engine is run at a rated speed of 2400 rpm. This selection gives 540 rpm to the PTO shaft and delivers the fully-advertised horsepower at rated engine speed.
The 540/540 Economy PTO offers all the features of the standard 540-rpm PTO, and the safety interlock is a foolproof measure provided to compensate for operator oversight.
When the tractor is in economy, the engine is limited to 1700 rpm, preventing accidental over-speeding of PTO implements and protecting against binding the PTO shaft.
The safety interlock also prevents accidental shifting of the PTO selector lever at engine speeds above 1700 rpm, which would lead to downtime for fixing implements or drivetrains.
85Hokie
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troveman,
this statement :
"since clearly the on-road diesel trucks run at much lower RPM and perform just fine without running wide open, or even 85% wide open."
so what you are saying is a fully loaded 18 wheeler starting off from a stop lights, will place it in 1st gear.......and then just use a low rpm to get it started to move?
I think not - and this is where we are comparing apples and hell, bananas .......
the discussion should be .........when a diesel is asked to do work, that is- place a load ON THE ENGINE, where should the throttle be set to?
AND when an 18 wheeler, dump truck, pick your vehicle .....when you WANT TO TO WORK, and here's the real point, work WELL and efficiently......YOU should place the rpm in the range that meets the need - and most of the time, the need is up near WOT or close to it.
Can someone spin a MMM or a rotary cutter at 1800 rpms and cut grass? SURE they can - but the engine is under a hellva lot of strain keeping those blades spinning, and geared or HST the "system" is working hard, and running it on the low end, only places more strain on the engine that if you get this point.
If fuel consumption is a point worth talking about - the advantage of a diesel over gas is non issue, diesel wins all the time, but if one is trying to say and I am throwing words out there " I dont want to waste fuel by revving up the engine" then we are looking at the situation in an entirely different light. Most of us really do not care if we burn 1 gallon and hour or 1.4322 gallons per hour - we want the job done in a "reasonable time"
again I say - run your engines the way you feel is the correct way, all of have a different point of view, some views come from paranoia and some come from science .....
what say we talk about religion or politics ?
Or you favorite football team?
this statement :
"since clearly the on-road diesel trucks run at much lower RPM and perform just fine without running wide open, or even 85% wide open."
so what you are saying is a fully loaded 18 wheeler starting off from a stop lights, will place it in 1st gear.......and then just use a low rpm to get it started to move?
I think not - and this is where we are comparing apples and hell, bananas .......
the discussion should be .........when a diesel is asked to do work, that is- place a load ON THE ENGINE, where should the throttle be set to?
AND when an 18 wheeler, dump truck, pick your vehicle .....when you WANT TO TO WORK, and here's the real point, work WELL and efficiently......YOU should place the rpm in the range that meets the need - and most of the time, the need is up near WOT or close to it.
Can someone spin a MMM or a rotary cutter at 1800 rpms and cut grass? SURE they can - but the engine is under a hellva lot of strain keeping those blades spinning, and geared or HST the "system" is working hard, and running it on the low end, only places more strain on the engine that if you get this point.
If fuel consumption is a point worth talking about - the advantage of a diesel over gas is non issue, diesel wins all the time, but if one is trying to say and I am throwing words out there " I dont want to waste fuel by revving up the engine" then we are looking at the situation in an entirely different light. Most of us really do not care if we burn 1 gallon and hour or 1.4322 gallons per hour - we want the job done in a "reasonable time"
again I say - run your engines the way you feel is the correct way, all of have a different point of view, some views come from paranoia and some come from science .....
what say we talk about religion or politics ?
Or you favorite football team?I understand the 540e. What I wanted to say was, if running at full rpm is best for the motor, then why did Kubota make an option to reduce the engine speed and still make the PTO run 540 rpm?
One of my first jobs was to drive a D6 cat pulling another cat that had a cable plow. I only ran that dozier WOT a hand full of times. The guy driving the plow set his speed and I had to apply pressure to his tractor to keep him from spinning. Only once do I remember being close to WOT while pulling. That was very hard clay and muck on top. I stretched to tow cable that ran to the plow and pulled the belly pan out from under the D5. That was a fun week fixing that.
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what say we talk about religion or politics ?
Hokie -
Hell, those wouldn’t be controversial at all here.
We all know Catholicism is the best (so my wife tells me, the only Methodist in the house).
We all know Trump was the better choice over Hillary. MAGA!
I don’t have a favorite football team since those fu€£ers don’t honor the National Anthem..screw them...don’t watch/follow it anymore....
Goes without saying that Syracuse University basketball and lacrosse programs are best in nation.....
I’ve got a better idea....let’s talk synthetic vs. conventional engine oil, or WTF do I do for the 50 hour service...those generate debate!![emoji12]
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85Hokie
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Dayum.....
you got me spittin' all over my screen.....that was funny as hell....
the trump part....... perfect
NFL...... the No Fun League...... and I aint watched in a while.....for the same reason
Now I might disagree with cha on the ORANGEmen..... but at least you dont like the team is shawshitzville
mmmm..... synthetics.... let me think on that one
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Diesel Engines with lots of hours run at low idle = an engine that will become an oil burner. Diesels need to generate heat to keep them burning the fuel all up to keep them from sending the excess unburnt fuel into the oil causing excessive wear. Isn’t going to happen all the time but it increases the likelihood of it happening.
RCW
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Dayum.....
you got me spittin' all over my screen.....that was funny as hell...
mmmm..... synthetics.... let me think on that one
Glad to provide some comic relief!![emoji12]
You watch out for Orange this basketball season .... this is our year. [emoji106]
Been a fan since about time Jim Boeheim was new coach.
‘Course, said that many, many seasons over last 40+ years....[emoji3]
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