Corriher should know better

[Tractors4u]

I saw a listing on Ebay for a Yanmar 2210 with live PTO. I figured it was one of the rookie tractor dealers, but I was wrong. They said it in their title and description. Corriher Yanmar

 

[thegreatrandini]

I saw that also. I have never ran a tractor with a live pto. I know some of them have a double clutch. I always wanted to know the exact difference. I remember some tractors that you had to be moving for the pto to spin. For awhile I thought if you could sit and run say a post hole digger that you had a live pto. I learned that was not true a few years ago. I still want to know what capabilties a true live pto has over the 2210. I know I can get a little push from implements. What is the simple answer?

 

[Tractors4u]

The 2210 does not have live PTO, however they (10 and 20 series Yanmars) are considered by some to be safer to use with a rotary cutter because of their powershift transmission. Because you can shift the tractor to neutral without clutching people feel that they are safer than a regualr gear tractor which would continue to move under the power of the rotary cutter even if you push in the clutch.

The PTO of the 2210 and most grey market Yanmars is tied directly to the gearing in the rear end of the tractor.

Some tractors have a two stage clutch. If you have the tractor in gear and the PTO engage and press the clutch in half way, the tractor will stop. Press the clutch all the way in and the PTO will stop turn. That type is considered a live PTO.

There are some tractors with "live independent" PTO. On some tractors the PTO is activated by pulling a knob or flipping a switch and is independent from the clutch.

To prevent the "push" you describe you need to add and over-run coupler to your PTO shaft. This is not the same as a slip disk. The ORC is a big ratchet. When you press the clutch on your tractor and the rotary cutter blade continues to spin and in turn spins the drive shaft, the ORC will free spin, "ratcheting" and the PTO on the tractor will remain stationary. Some tractors without live PTO have an ORC built in.

 

[thegreatrandini]

My tiller has a big overrunning clutch but I think it is designed to protect the tiller? I did understand the live pto correctly. I don't think u'd want a two stage clutch with the powershift. I have pretty much figured out how to not get any push but I should prob pick up and install an ocr. The wife keeps wanting tractor lessons. I should get one on it just in case she ever mows. I have just been the laziest human on the planet lately. Do you often have to cut the pto shafts after u install the orc? Thanks

 

[Tractors4u]

Having a 2 stage clutch with a power shift would not be a problem. Really the only time you will get a PTO push is from a rotary cutter. That blade builds up a lot of stored energy and will spin for a few minutes. On a tractor without a second stage clutch or ORC, that spinning blade is the same as having an engine back there. With a tiller, finish mower, post hole digger, etc, you won't have enough momentum to push the tractor.

 

[California]

On the YM240 (US version YM2000) an overun clutch is inside the PTO.

The first time I heard it I was concerned. It sounded like coasting on a bicycle except 50 times louder. I thought it was an almost-engaged gear.

Just like a bicycle, it allows the back to spin free without pushing the gears ahead of the PTO.


re Corriher - they don't seem to know everything. Last year I bid their Ebay auction titled "Yanmar fuel filter assembly - complete" and found it won't take Yanmar filter elements. I wish they had described it as generic.

 

[cfoxmd]

I think my FX28 D does have a live PTO--separate switch PTO including neutral.

 

[Tractors4u]

Hmmm, I am trying to remember the PTO engagement setup on the FX26D that I had. I am thinking that mine was a lever similar to a gear shift that was engaged by using the clutch.

 

[YanmarFever]

Im sorry to say that the FX28 does not have a live pto.
In fact most if not all the gray yanmars do not.
Running a mower without a slip clutch is asking for trouble. /forums/images/graemlins/shocked.gif
my .02 Ernie
Ernies imports

 

[tractor123]

There must be some confusion about live PTO. Live PTO is the ability to stop the movement of the tractor while keeping the PTO turning. All hydrostatic tractors have live PTO since when you release the pedal, the tractor stops moving and the PTO continues running. This is the same with power shift on the Yanmar tractors, when you shift into N (without even touching the clutch) the tractor movement is halted and the PTO continues to turn making these power shift models have live PTO... I am Rick with Corriher Implement Co., Inc...