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How effectively one can run electric generator by tractor

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Padmakar Pariha

01-07-2000 05:15:16




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We are planing to use our 40HP tractor to run 30KVA generator which would be ultimately used for irrigation. In this regards we contacted our local power generator supplier. Instead of doing this they are advising us that better to have full Diesel Engine Driven Generating (DG) set. They are saying that its rather difficult task to connect tractor engine with external generator with coupling device. For full DG set we will have to pay much and that is not bearable to us at present. Can any one help me in this context.

Thanks in advance.

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Burrhead

01-08-2000 09:11:46




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
Here's how I did it Padmakar. The engine blew up on one of our gen sets. I put the gen set on a steel skid and installed a 3 point hook up to the front side of the gen for stability when in use.
I built and adapter and put a 3 speed straight shift Chevy transmission attached to the gen set with the input shaft of tranny to the gen set.On the output shaft of the tranny I built a pto shaft to the tractor. In other words the tranny is put in the pto shaft with input shaft as the output shaft now.
If you put tranny in highest gear it is a direct rpms from tractor to gen set. If you want the gen set to spin faster just shift the tranny to a lower gear and the gen set gains rpm's.
I use this set up to run irrigation pumps and have had no trouble at all with it. The 26hp tractor will turn the gen set very good at 1000 engine rpm's and with the pto Chevy tranny in 2nd gear.
I used old tranny and pto shaft parts from salvage here at the farm and it actually cost only some time and labor, plus a little welding and ridicule, but it works very good.

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Padmakar

01-08-2000 22:49:23




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 Re: Re: How effectively one can run electric generator by tractor in reply to Burrhead, 01-08-2000 09:11:46  
Thanks a lot Burrhead. May I have a copy of the scanned version of your design of the complete generator set including PTO shaft. My E-mail address is psp@iucaa.ernet.in

Padmakar



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Burrhead

01-09-2000 18:30:43




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 Re: Re: Re: How effectively one can run electric generator by tractor in reply to Padmakar, 01-08-2000 22:49:23  
You sure may. I'll get a pic and scan it.



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Harold New York (USA)

01-07-2000 21:02:17




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
Padmakar-What kind of pump are you operating? Is it (1)a centrifugal pump that sits on the surface and pumps from surface waters or a shallow depth well or, (2) is it a deep well turbine type pump with the electric motor at the surface on top of the well driving a line-shaft turbine or, (3)is it a deep well submersible pump where the electric motor and pump are both down in the well water? If you have either situation (1) or (2) I believe you should consider a direct connection from the tractor pto to the pump. In the case of the turbine pump (2) you would remove the electric motor and replace it with a right-angle gear drive of the proper ratio and then connect this to the tractor pto. If you are using a centrifugal pump (1) then I believe you would do better to purchase a centrifugal pump designed for tractor pto operation; these have the proper gears to step up the speed of the pto. Only in situation (3) the submersible, or if you can't position the tractor next to the pump, or if you are using the electricity to power electric motors for a traveling sprinkler, should you even consider the generator. With a generator you are adding another link that needs maintenance, introduces power losses, and can break down. In any event, if you use this tractor or a newer one and are running it unattended, be sure it is equipped with gauges to shut it down automatically if it overheats, looses oil pressure or the irrigation pump pressure drops suddenly; that is unless you can station someone to keep an eye on it at all times. Good luck in your venture.

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ltf in nc

01-08-2000 10:36:01




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 Re: Re: How effectively one can run electric generator by tractor in reply to Harold New York (USA), 01-07-2000 21:02:17  
Padmakar Parihar,
As mentioned in the above post it is mandatory to have a monitoring system on the tractor to avoid major failure should something break. This is the source for such a device---http://www.murphyswitch.com/ea160.htm



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ltf in nc

01-07-2000 14:52:43




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
Padmakar Parihar,
I believe that you are moving in the direction of using a generator because you already have an electrical driven pump. At the location--- Link --- you can view some pics and a spec sheet. Power takeoff (PTO) generators are dependable and provide good standby reliability. Most poultry farmers in the USA have at least a 25kw unit for emergency. I do know that you experience intermittent delivery of electrical power and that you may have alternate use of the generator other than running the irrigation pumps. If however the pumps are the sole requirement, you need to consider driving the pumps directly if the setup will permit. The efficiency would be much better. Obviously deep well pumping is out of the question. What is the source of the water?

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Padmakar Parihar

01-07-2000 22:42:12




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 Re: Re: How effectively one can run electric generator by tractor in reply to ltf in nc, 01-07-2000 14:52:43  
I'm sorry for not mentioning source of the water. Actually sources of the water are four deep wells (40 to 100 meter) and submersible electric pumps are being used to lift water. HP of the pump sets ranging 5 to 7HP and all these submersible pumps are sitting different location of the farm.



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Dale (MI)

01-07-2000 08:17:16




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
It looks like you are coming from India. I was just in Nepal and Sikkim in November and saw a few Fords, Massey Fergusons and Farmalls. Most of the tractors appeared to be Asian though. What kind of tractor are you using? Does it have the standard PTO shaft?



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Padmakar Parihar

01-07-2000 08:41:02




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 Re: Re: How effectively one can run electric generator by tractor in reply to Dale (MI), 01-07-2000 08:17:16  
Thank you Dale. Indeed your guessing is true. I am from central part of India. We have one Escort 40HP tractor which is relatively old model and willing to purchase new one. I don't know whether our old tractor has PTO shaft or not, but I can make enquiry about new one. Suppose my answer about your question is both Yes and No (at present I am far away from tractor site) in that case what would be your advice to me.

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rana khalid mahmood

01-09-2005 23:52:57




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 Re: Re: Re: How effectively one can run electric g in reply to Padmakar Parihar, 01-07-2000 08:41:02  
dear sir/madam. happy new year to u and you, i am pleased to send inqury regarding purchase of electric ,diesal generator 5 to 100 kva .if u have like this ,kindly send me details ,waiting for ur reply, rana khalid mahmood lahore pakistan phone- +92 3009426028



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Dale (MI)

01-07-2000 09:07:49




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 Re: Re: Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 08:41:02  
OK, I saw lots of Escorts from a distance but don't know about their PTO. You can always have a PTO shaft made up with correct length and ends. If you have a PTO shaft that fits the generator and tractor, then connecting and disconnecting it is a trivial matter. They were designed for that reason. I assume you probably only irrigate part of the year and then the advantage of a PTO driven unit is that are not paying for and maintaining an engine that is sitting idle most of the time.

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Dale (MI)

01-07-2000 08:31:51




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 Re: Re: How effectively one can run electric generator by tractor in reply to Dale (MI), 01-07-2000 08:17:16  
So I would assume that you must be running two or more electric irrigation pumps in different locations or you would want to run the pump directly from the tractor PTO. I heard the other day that not all PTO driven generators are made for long continous use so that is something to consider. Otherwise, a good tractor (like an Oliver or Farmall ;^)) could run for months without maintenance.



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Gerald J.

01-07-2000 07:57:50




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
When the generator is made to be PTO driven (e.g. has a gear box to convert 540 to 1800 or 3600 RPM at the generator shaft) the connection to the tractor is no more difficult than connecting any PTO driven equipment.

If the irrigation equipment company has only generators that need 1800 RPM and can't supply the gear boxes, the connection to the PTO IS difficult.

40 HP engine power will be marginal if you load the total 30KVA and may not start the largest motor successfully if anything else is running. It may be necessary to carefully control the sequence of starting to start the largest motor by itself then the other motor, still one at a time.

Gerald J.

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MrG:high speed PTO

01-07-2000 09:19:21




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 Re: Re: How effectively one can run electric generator by tractor in reply to Gerald J., 01-07-2000 07:57:50  
Excuse my stupidity on this, but don't most tractors from the mid '60's forward have dual speed PTO's? I know the 3020 did, I had the swap the 540 spline shaft for a fine spline (what rpm I don't know) high speed shaft every year when we mounted the cornpicker. Somebody clear this up for me, I'll be wondering all day! Gadget



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Gerald J.

01-07-2000 10:32:05




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 Re: Re: Re: How effectively one can run electric generator by tractor in reply to MrG:high speed PTO, 01-07-2000 09:19:21  
Depends on tractor horsepower. 40 hp most likely is 540. But the 1000 RPM PTO still isn't fast enough for an 1800 or 3600 RPM generator.

Gerald J.



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Dale (MI)

01-07-2000 10:57:47




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 Re: Re: Re: Re: How effectively one can run electric generator by tractor in reply to Gerald J., 01-07-2000 10:32:05  
The PTO driven generators that I have looked at so far were all for 540 RPM.



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The Red

01-07-2000 06:00:22




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 Re: How effectively one can run electric generator by tractor in reply to Padmakar Parihar, 01-07-2000 05:15:16  
I would shop the Northern Hydraulics store. They have a couple of PTO generators for less than $2,000. 40 hp should be more than adequate.



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