bird dog
Well-known member
Question. Most shredders say to operate at a pto speed of 540. What happens if you don't? It seems that if what you are cutting is thin, why run at full speed if it is working correctly at say 470?
Thanks
Thanks
Texasmark":2i16twyq said:Depends. The faster the PTO RPMS, the higher the tip speed, the more kinetic energy stored in the blades and the nicer the cut. I usually run 540 on the PTO for that reason but I have tractors that have different PTO ratios that I can select so on light cutting I can cut the tractor RPMS down and still get 540 on the PTO.
bird dog":1li163ki said:Thanks for the replies. Reasons I asked are many but Butch mentioned one. The terrain is rough and and hilly and to get the speed correct sometimes is difficult. Two ranges and four gears is not quite enough to hit the sweet spot. Fourth gear in turtle is to slow. First gear in rabbit is to fast.
Fuel consumption is another issue. The extra 500 RPM's needed to get to 540 uses quite a bit of fuel over days usage. I would like to have a tractor that would turn the 540 at a less RPM when it is okay to do so but there s not one in my future.
I don't shred enough for it really to matter, just curious more than anything. I mowed some the ditches this morning before the rains came. Second gear turtle because it was rough and on a side slope. I needed every bit of the 540 rpm's power for this. Its a wonder how good a crop of Johnson grass I can grow in areas that are unavailable to graze.
Brute 23":3pkfaaec said:What is the benefit of not running 540?
There is no way of knowing with out having the run sheets on that motor. Most motors have an area of use then based on the load they can really dial in the sweet spot for peak efficiency.
One thing to consider is potential cooling issues even though with a pretty light load it shouldn't be.
I don't really see the benefit of running a lower RPM. I doubt the fuel consumption or wear and tear really amount to much. You probably have more to risk going against the recommended RPM than to gain trying to do it differently.
I don't know much about the Green ones.Brute 23":2f3dgq68 said:Got ya. Ive always like that our JD has 2 ranges, 4 gears in each, then a little shifter for another gear in between the main ones. So you can run 3rd and flip that deal and its faster than 3rd but not as fast as forth. Some one can probably explain it better but its handy as be nice. I find myself using it a lot. Not sure how common that is.
greybeard":1yd8jz2q said:I don't know much about the Green ones.Brute 23":1yd8jz2q said:Got ya. Ive always like that our JD has 2 ranges, 4 gears in each, then a little shifter for another gear in between the main ones. So you can run 3rd and flip that deal and its faster than 3rd but not as fast as forth. Some one can probably explain it better but its handy as be nice. I find myself using it a lot. Not sure how common that is.
Is that what they call a creeper gear?
greybeard":5xzn8rz9 said:I don't know much about the Green ones.Brute 23":5xzn8rz9 said:Got ya. Ive always like that our JD has 2 ranges, 4 gears in each, then a little shifter for another gear in between the main ones. So you can run 3rd and flip that deal and its faster than 3rd but not as fast as forth. Some one can probably explain it better but its handy as be nice. I find myself using it a lot. Not sure how common that is.
Is that what they call a creeper gear?
Brute 23":3ihn3mr9 said:greybeard":3ihn3mr9 said:I don't know much about the Green ones.Brute 23":3ihn3mr9 said:Got ya. Ive always like that our JD has 2 ranges, 4 gears in each, then a little shifter for another gear in between the main ones. So you can run 3rd and flip that deal and its faster than 3rd but not as fast as forth. Some one can probably explain it better but its handy as be nice. I find myself using it a lot. Not sure how common that is.
Is that what they call a creeper gear?
From what I read on a creeper gear just now its not the same. The lever basically gives you a gear in between each of the 8 main gears. You can run like 1, 1.5, 2, 2.5, 3, 3.5 4, 4.5, 5, 5.5 etc all the way to 8.5. A lot of the implement work is done in 3 and 4th. You end up with 4 options... in 3rd and 4th gear rather than just 2.
Here is how they list it on the tractor data sheet. They call it 1L, 1H, 2L, 2H all the way to 8L, 8H.
http://www.tractordata.com/farm-tractor ... ssion.html
cfpinz":nosu4ajb said:Brute 23":nosu4ajb said:greybeard":nosu4ajb said:I don't know much about the Green ones.
Is that what they call a creeper gear?
From what I read on a creeper gear just now its not the same. The lever basically gives you a gear in between each of the 8 main gears. You can run like 1, 1.5, 2, 2.5, 3, 3.5 4, 4.5, 5, 5.5 etc all the way to 8.5. A lot of the implement work is done in 3 and 4th. You end up with 4 options... in 3rd and 4th gear rather than just 2.
Here is how they list it on the tractor data sheet. They call it 1L, 1H, 2L, 2H all the way to 8L, 8H.
http://www.tractordata.com/farm-tractor ... ssion.html
Most of my Fords have something similar to what you're talking about, they call it Dual Power. It's an underdrive gear reduction for each gear (.8 I believe) that can be shifted on the fly. I've driven a bunch of the older Deere's with the rabbit/turtle lever on the left, and some of the newer ones were on the right hand shifter console - 2950, etc.
Brute 23":1qfnh18e said:Yes sir. That is how this one is. Little lever on right by all the other shifter. You can flip back and forth on the fly. Its handy as a shirt pocket.
cfpinz":clto1i92 said:Brute 23":clto1i92 said:Yes sir. That is how this one is. Little lever on right by all the other shifter. You can flip back and forth on the fly. Its handy as a shirt pocket.
Don't they default back to one of the settings when you cut the tractor off? I have it in my mind they jump back to rabbit when you cut it off. Friend of mine has a 2950, you just slap the gear shifter left or right on it instead of having a separate lever. He had the tractor for a good while before he knew it had it.