B2320 PTO generator speeds

[displacedPA]

I have been looking at pto generators all use 540rpm.
My thoughts are can, I use my 960rpm setting on my pto to run at a lower motor rpm and still get to 540 rpm at the PTO

I dont want to load the tractor to much but this was just a thought I had..

thanks for any input..

 

[JCByrd24]

The HP required by the generator will be related to how much electricity you are trying to draw from the generator. For many reasons, I would buy the generator based on running the 540 rpm PTO and your tractors HP. Then, when you have low electrical loads, assuming you've calculated the engine RPM necessary to run the 960 rpm at 540, you can try running the generator like you suggest. My suggestion would be to calculate the kW you think you are using compared to the generator rated output, and not exceed 30-40% of that. Then, listen to what the engine is telling you. If it bogs and doesn't recover within a couple seconds of applying the electrical load (similar to a standalone generator), you don't have enough HP and need to switch to the 540 rpm PTO. Again, this will vary depending on the electrical load at the time, for some things it'll work and some things it won't.

 

[leonz]

You should plan on running your generator
at the 540 R.P.M., throttle setting as the
possiblity of damaging the generator if it
has carbon brushes and your appliances
with less than 115-230 volt AC power as
the circuit boards could be damaged
from possible voltage spikes.


In my example the coleman generator
I own is set up with a high idle throttle
setting to provide 2 legs of 110-120 volt
power at all times with no loss of power
or possile voltage spikes.



_________________________________________________________________
Once you go flail you never go back:thumbsup::licking::drool:

 

[bp fick]

The B2320 has two settings for the PTO. In the 540 setting, the engine is turning about 2770 rpm. When set in the 960 position, (if the engine was again spinning at 2770 rpm) the PTO rpm would be 960 rpm. But the engine runs approximately 45% less rpm to achieve the same 540 PTO rotation speed. This would put your engine's rpm at or about 1250.

As long as the generator is spinning at the speed required, I don't particularly see how it knows or cares what RPM speed the engine on the tractor is turning.

Am I missing something here? Would it hard on the tractor to run at 1250 rpm sitting there, turning it's PTO?

 

[leonz]

If I remember correctly the 540 R.P.M., setting assures that the current delivery and amperage is 220 volt single phase at 100 amperes minimum.

The other thing is that they do not have a voltage regulating transformer on the output side of the generator as well to protect the appliances/motors/goodies.

 

[kuboman]

You will find your tractor will not be able to deliver much in the way of HP at that low of rpm. 1250rpm is hardly more than an idle. You will also find that as the electrical load changes your engine rpm will vary too because it is unable to govern properly.

 

[PHILIP8N]

The B2320 has two settings for the PTO. In the 540 setting, the engine is turning about 2770 rpm. When set in the 960 position, (if the engine was again spinning at 2770 rpm) the PTO rpm would be 960 rpm. But the engine runs approximately 45% less rpm to achieve the same 540 PTO rotation speed. This would put your engine's rpm at or about 1250.

As long as the generator is spinning at the speed required, I don't particularly see how it knows or cares what RPM speed the engine on the tractor is turning.

Am I missing something here? Would it hard on the tractor to run at 1250 rpm sitting there, turning it's PTO?

Ditto, Not enought hp at 1250 rpm to power more than a fridgerator and a few light bulbs, plus the governor will not pick up the load very well. We build small compressors with Kubota and Cummins engines and they run full out at 2600 rpm for hours on end for 1000's of hours with no issues. Buy the generator sized for the 540 pto / 2770 engine rpm and don't worry about it. This is where a small short stroke engine is suppose to run. If you are still worried about it, buy a 8K/10K stand alone gasoline generator. I have one that runs 3600 rpm with several 100 hours on it, no problems. Philip.

 

[BeezFun]

Hmmm, I'm confused. I have this PTO generator which also says it runs at 540 RPM, but I run it off my rear PTO and set the engine at the same RPM I use to mow with, which means the PTO is turning 960. I check the voltage on the generator to fine tune the RPM, but it's pretty close to the mowing RPM. I've been using the generator for years now, and it works, so I must be missing something...

 

[jakell2010]

Bees,,,,your rear PTO MOWERS ALL RUN AT 540,,,,why does everyone think they are smarter than the design teams that put millions into the R&D for these products.

The tractor is designed to run at the little red line on the tachometer,,,that's why they put it there, you will do more damage to your machine trying to half the RPMs then you'd ever do running it for weeks on end where it's supposed to be

 

[displacedPA]

this is all good info.. guys thanks... Ill keep researching but i may end up with a stand alone gen. why put the hours on the tractor...

 

[kuboman]

Your choice but unless you are going to put many many hours on running the generator why not just use your tractor. Running it a pto speed will not hurt it. Remember that these engine do run gen sets and reefers and they run 10-15000 hrs before they are retired.:thumbsup:

 

[crazyal]

this is all good info.. guys thanks... Ill keep researching but i may end up with a stand alone gen. why put the hours on the tractor...

It's not just hours on your tractor but it's adding hours to things like oil changes. If you run your tractor for 100 hours (four days straight) then 1/4 of the life of your hydraulic oil and filter have been used up for nothing.

 

[PHILIP8N]

why put the hours on the tractor...

That's what it is for. It is paid for. Probably makes more power than most standby's. Is more efficient. But, the standby will probably be easier to use. (I have a 14hp 10K/8K gasoline stand-by). Philip.

 

[PHILIP8N]

If you run your tractor for 100 hours (four days straight) then 1/4 of the life of your hydraulic oil and filter have been used up for nothing.

Good point! Guess one could always add that to the OCI (500 hours instead of 400 hours). For me anyway, I only do about a 100 hours a year, so not big deal. Philip.

 

[Bugsyinc]

I have this Generator http://www.northerntool.com

I run it off my L260 which has a four speed PTO. I have the PTO in third gear and the tractor runs slightly over idle speed. It runs my whole house and never bogs the engine, even when the well pump kicks on. :thumbsup:

If I put the PTO in fourth gear, the engine will run very slow, but will bog under load.

This is the only reason I've kept the OLD beast... :drink: It will run about 14 hours on five gallons of fuel. My BX24 would have to be turning high RPM's and would be nowhere near as efficient!

 

[PHILIP8N]

I have this Generator

QUOTE]

I could not get link to open, probably my computer. What kw is this unit and hp required at full load?

One thing to keep in mind. Our old house was gas heat/range/water heater. We could run that whole house plus christmas lights with our 10K/8K gasoline generator.

Our new house, 100% electric. We are not running this whole house with our 10K/8K gasoline generator.

Philip

 

[Bugsyinc]

Good point,

I have no high draw equipment being used when running the Generator. The well pump is the highest draw.

Mine is the Northstar 7200 watt 14 HP NorthStar PTO Generator — 7200 Watt, 14 HP Required | PTO Generators | Northern Tool + Equipment

My point was that (at least with my old L260) it is OK to run the engine slower and the PTO higher.

The generator has a guage on it indicating the proper voltage range so it is easy to set the throttle to be in the "GREEN" zone.

 

[displacedPA]

Still will have to think about it... I rarely use a generator for anything else.. and we rarley loose power but if we do it could be some time before we get it back.. I just want to be able to run the well. maybe the frig.. and a few lights... I heat with wood in the winter so the furnace would not be running...
Im not looking to have everything going at once either... I just hate having a big stand alone unit when I could have this ready to hook to the tractor in the tractor shed... Hmmm and leave the tractor under cover while doing it... tough call...

 

[brin]

It's not just hours on your tractor but it's adding hours to things like oil changes. If you run your tractor for 100 hours (four days straight) then 1/4 of the life of your hydraulic oil and filter have been used up for nothing.

Please explain how running a tractor , standing still to run a PTO generator for 100 hrs. or more would have any effect on the hydraulic oil and require it to be changed ???? Engine oil...yes....Hydraulic oil not at all, in my view..the hydraulic oil is not being worked at all..the tractor is just sitting...

 

[PHILIP8N]

Please explain how running a tractor , standing still to run a PTO generator for 100 hrs. or more would have any effect on the hydraulic oil and require it to be changed ???? Engine oil...yes....Hydraulic oil not at all, in my view..the hydraulic oil is not being worked at all..the tractor is just sitting...

I agree, but my next hydro change is at 638 hours. Now I must record the hours run only on pto mode only and add to that 638 I have written in my service log. I don't know if anyone uses their HST+ maintenace mider, I don't, but that will be all out of whack now too. Could get confusing. Philip.