3-Point Hitch Three-point hitch generators

[buckAngus]

Greetings,

I'm trying to educate myself about using the 3-point hitch on my JD 2032r to power a 10 kw generator. I've been told that my JD CUT will automatically maintain the rated 540 PTO speed regardless of the generator load. Can someone please verify this, and provide your perspectives?

Thank you.

Buck

 

[calman93611]

this is what I found on a previous post by Kjung17efault Re: 540 RPM PTO Question
540 rpm is the rated speed of the implement. Engine/PTO speeds are directly proportional. There is usually a mark on the tachometer to indicate the spot where the PTO reaches rated speed. Newer tractor PTOs are hydraulically engaged and are driven directly off of the engine. Some have a mechanical engagement, but are still driven independently from the transmission.

I have been thinking about adding a PTO generator also. I think, depending on what you are operating, 2 things may be important to have on the generator. Voltage meter and frequency meter. Frequency being 60 cps. If you can find an inverter generator then the generator should take care of all these issues. The newer inverter generators can run at close to idle still produce 120 vac @ 60 cps.

 

[zzvyb6]

Buy a Kil-O-Watt device from Costco or eBay/Whatever. It plugs into a 120v outlet (on the generator) and then you can fine tune the tractor rpm to set the output frequency to 60 Hz.

Inverter generators are DC and convert the variable current and voltage to a constant 120/240 voltage. They can ramp up the rpm (power output of the motor) to satisfy the load demand. I don't believe an inverter generator discussion applies to a tractor powered PTO unit.

Your tractor's governor should maintain the engine rpm, hence the generator frequency.

 

[Sawyer Rob]

The pto gensets "should have" a meter on them, you increase the pto speed until the meter shows the "proper" voltage...

I bring mine up to the speed it should be on the meter and then add a light load on the genset. I then keep adding electrical load and adjusting the throttle up, to keep the voltage in the proper place on the meter.

Once set, unless you have your tractor maxed out for power, you won't have to bother with the setting again, as the tractors governor will make all the adjustments from then on.

SR

 

[Ed of all trades]

The pto gensets "should have" a meter on them, you increase the pto speed until the meter shows the "proper" voltage...

I bring mine up to the speed it should be on the meter and then add a light load on the genset. I then keep adding electrical load and adjusting the throttle up, to keep the voltage in the proper place on the meter.

Once set, unless you have your tractor maxed out for power, you won't have to bother with the setting again, as the tractors governor will make all the adjustments from then on.

SR

That is the way I set mine. I find that Having a little larger gen. than you can pull is helpful if you want to get all you can out of your tractor. That way the tractor is the limiting piece and not the gen.

 

[Sawyer Rob]

That is the way I set mine. I find that Having a little larger gen. than you can pull is helpful if you want to get all you can out of your tractor. That way the tractor is the limiting piece and not the gen.

I agree...

Here's a rule of thumb, it's takes two "pto" hp to make 1,000 watts... AND for "continuous" duty, you should NOT pull more than 80% of the max pto hp you tractor makes, out of it's pto.

SO, if you have a 20 "pto" hp tractor, you can make 10kw with it, BUT for "continuous" duty, you should not make more than 8kw with that tractor.

SR

 

[Industrial Toys]

I had an Onan 15KW PTO genset on a JD770. It worked quite well. Except that the throttle was absolutely wide open to maintain 60 cycles! That speed is then governed by the tractor governor.

Why I opted out of a PTO genset in favour of an Onan/Kubota 1800 RPM stand alone genset?

The new genset was available cheap plus the price of a Rotor rewind. Plus mounting it on a skid and fuel tank.

Putting the trailer mounted PTO genset on was a pain to put on, possibly having to move stuff around and tripping in the dark. It used to be skid mounted which was a hundred times worse. Sometimes after all that, the power would come back on. Sometimes I didn't want to risk the bother of hooking it up, in case the power came back on, and of course it didn't!

I never liked the idea of my darling little 770 running out there full tilt, without any murphy type shut down system. If it lost coolant, a fan belt or oil pressure it would be destroyed in short order!

I also didn't like the idea of the tractor running full tilt to power what might only be a couple of bulbs.

 

[newbury]

<snip>
I also didn't like the idea of the tractor running full tilt to power what might only be a couple of bulbs.

True - that's not worth it. But then running a 15KW (or even 10KW) is overkill for a couple of bulbs. For that pick up a little 1KW generator.

 

[Sawyer Rob]

True - that's not worth it. But then running a 15KW (or even 10KW) is overkill for a couple of bulbs. For that pick up a little 1KW generator.

I agree... If that deere had to be run wide open to bring the pto up to speed, it would be why I don't have that deere sitting in my yard!

BUT, for those little jobs, and for power away from my house or shop, that's why Honda invented these!

It's been VERY useful to have around my place!

SR

 

[newbury]

I agree... If that deere had to be run wide open to bring the pto up to speed, it would be why I don't have that deere sitting in my yard!

BUT, for those little jobs, and for power away from my house or shop, that's why Honda invented these!

It's been VERY useful to have around my place!

SR

Honda invented gasoline jugs?