adventure bob
Platinum Member
I have 5ft tiller to my Kub 4060 and seem to have to rev the tractor awful **** high to get to 540RPM on the dash gauge: Is that normal?
First Ground Contact Implement
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jeff9366
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- Kubota Tractor Loader L3560 HST+ ~~~~~~~~~~~~~ 3,700 pounds bare tractor, 5,400 pounds operating weight, 37 horsepower
You have a tachometer don't you? How many engine revs does it take to reach 540 rpm on the PTO indicator?
Pete Judd
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Normal on these tractors, they are made to run full out all day long. I mow and hog, at 2600 rpm all day long, and the tractor just loves it.
PHPaul
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True of most diesels: Better to run them at max rated RPM and pick an appropriate gear to set the ground speed. Lugging them just wastes fuel and can cause cylinder washing and get diesel in the oil.
My JD 750 happily runs at rated RPM running a log splitter for hours at a time and just sips fuel.
My JD 750 happily runs at rated RPM running a log splitter for hours at a time and just sips fuel.
gwdixon
Elite Member
My BX2200 doesn't have a tach and has to be run at full throttle (WOT) to get what I'm only guessing to be 540 rpm at the PTO. It runs smoothly and efficiently as do the implements.
The important thing to remember is that an implement that calls for 540 rpm works best at the throttle setting that achieves that PTO rpm. On most tractors it seems to be somewhere between 2200 - 2800 rpm. There should be an indicator on the tach if the tractor has one.
Bush Hog-type mowers are particular noteworthy. Those big blade need to be spinning at a high rate in order to achieve and maintain the momentum to cut heavy grasses and even saplings. Running lower rpm will cause the blade to pivot out of the way on contact and teeth-rattling vibrations come into play.
Flail mowers have similar issues but with light flails the major problem is just very poor cuts. Think of how a weed-eater cuts much more efficiently when run at high speeds.
Rototiller can be run at lower rpms but the tiller and the tractor will suffer eventually.
The important thing to remember is that an implement that calls for 540 rpm works best at the throttle setting that achieves that PTO rpm. On most tractors it seems to be somewhere between 2200 - 2800 rpm. There should be an indicator on the tach if the tractor has one.
Bush Hog-type mowers are particular noteworthy. Those big blade need to be spinning at a high rate in order to achieve and maintain the momentum to cut heavy grasses and even saplings. Running lower rpm will cause the blade to pivot out of the way on contact and teeth-rattling vibrations come into play.
Flail mowers have similar issues but with light flails the major problem is just very poor cuts. Think of how a weed-eater cuts much more efficiently when run at high speeds.
Rototiller can be run at lower rpms but the tiller and the tractor will suffer eventually.
jeff9366
Super Star Member
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- Kubota Tractor Loader L3560 HST+ ~~~~~~~~~~~~~ 3,700 pounds bare tractor, 5,400 pounds operating weight, 37 horsepower
TSO
Elite Member
Yup ... my Massey 1648 is right around 2500 RPM's (it also has a digital display showing exactly what speed the PTO is turning) ... my LS R4047 (same ad NH Boomer 50 & Case Farmall 50B) was around 2500 as well.
Travis_R
Veteran Member
My '98 Massey Ferguson 231 is 38 engine hp. and 34 PTO hp.
540 PTO is at 1788 engine RPMs. I can't believe how easy that Perkins engine sips diesel. One time I literally thought the fuel gauge quit working!
540 PTO is at 1788 engine RPMs. I can't believe how easy that Perkins engine sips diesel. One time I literally thought the fuel gauge quit working!
Texasmark
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My Branson has 3 PTO speeds, lever selected in the cab, from 540 at the rated 2600 rpms down to 540 at around 1700 rpms. Torque curve peaks at 1600 and is relatively flat on out. Depending on work to be done, I can reduce the wear and tear and engine noise when desired.
Mark
Mark
OP
adventure bob
Platinum Member
The RPMs everyone is posting is right where Im at, 2350 to get to 540 on the tiller. The one thing I did notice though was that no matter how deep or how hard the ground was the Engine RPM never faltered, even climbing really steep stuff with the tiller engaged.
My previous experience with tillers and bush hogs was on a 9N which barely turned any rpm to get to PTO speed.
My previous experience with tillers and bush hogs was on a 9N which barely turned any rpm to get to PTO speed.