Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tractor Talk Discussion Forum

generator help

Welcome Guest, Log in or Register
Author 
Ronnie269

10-22-2005 05:09:50




Report to Moderator

I have a subaru ( diesel) generator model number SDG2200S, I'm haveing to run it at twice the normal RPM'S to get 120 volts, sixty cycles , can anyone tell me what could cause this? Also would like to get a tech manual on this Gen>
Thanks for your help
rlp2690@aol.com




[Log in to Reply]   [No Email]
Technoid

10-26-2005 16:55:02




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
Ron, I got your email. I would be glad to help out as much as I can.



[Log in to Reply]  [No Email]
Technoid

10-23-2005 07:55:36




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
I work on generators at my job. Depending on the number of poles, a generator will produce 60 cycles at either 1800 or 3600 rpm. This is a factor that does not change. The freq will change with the rpm. It is not possible to loose proportional freq/rpm.You need to have an accurate tach or freq meter. Watch the rpms as the engine loads up. Make sure the governor is maintaining the correct rpm. From what you wrote, it sounds like the voltage regulator or a winding went bad. Most likely a winding since you need more speed. To check the windings, you need an instrument called a meg ohm meter. It a small hand held generator with a crank that puts voltage into the winding. It tests the insulation break down. It reads back from megohms to ohms of short. If you use one, be sure to disconnect the voltage regulator from the circuit.

[Log in to Reply]  [No Email]
Kevin (FL)

10-23-2005 05:11:34




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
Ronnie,

Something ain't right here. Is this a direct-driven generator? Belt-driven off a pulley?? Diesel engines are governed to run at a specific RPM. Most smaller genset engines are governed to either 1800 or 3600 RPM. Larger diesels are governed at 1200 or even slower depending on size/HP. You can't take an 1800 RPM engine and force it to turn 3600--even if you override the governor, I believe it will come apart before you got to 3600 RPM. The same for the 3600 RPM engine--doubling the RPM will create a shrapnel grenade....With that being said, are you certain about RPM? Maybe a faulty tachometer?? If you don't have a good frequency meter, you can also use a phonograph and play a record--you'll hear the pitch of the music is off when the frequency is not at 60 hertz.

[Log in to Reply]  [No Email]
farmboysteve

10-23-2005 02:52:31




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
use a tv set. vertical hold uses 60 cycle from house current for sync to keep the picture from rolling.



[Log in to Reply]  [No Email]
RayP(MI)

10-22-2005 14:03:35




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
How are you measuring the 60 cycles?



[Log in to Reply]  [No Email]
Ronnie269

10-22-2005 16:18:51




Report to Moderator
 Re: generator help in reply to RayP(MI), 10-22-2005 14:03:35  
RayP, I have a volt- Hz meter



[Log in to Reply]  [No Email]
RayP(MI)

10-22-2005 18:36:12




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 16:18:51  
Check it against your house 110v outlet. See if it's reading correctly, then try it on your generator under load like a milkroom heater, resistive load. Some of the cheaper handyman meters tend to "bounce" and read incorrectly. Got an old electrical clock with a sweep second hand? Plug it in and see if the second hand "really flies!" (Evidence of 120hz.) If these backup tests seem to indicate that the generator is putting out improper frequency, voltage, best get it to a shop capable of checking it out - there's probably something wrong!

[Log in to Reply]  [No Email]
RayP(MI)

10-22-2005 18:35:54




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 16:18:51  
Check it against your house 110v outlet. See if it's reading correctly, then try it on your generator under load like a milkroom heater, resistive load. Some of the cheaper handyman meters tend to "bounce" and read incorrectly. Got an old electrical clock with a sweep second hand? Plug it in and see if the second hand "really flies!" (Evidence of 120hz.) If these backup tests seem to indicate that the generator is putting out improper frequency, voltage, best get it to a shop capable of checking it out - there's probably something wrong!

[Log in to Reply]  [No Email]
buickanddeere

10-22-2005 08:59:11




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
Double normal rpm would be 120 Hz.



[Log in to Reply]  [No Email]
Jim_bobb

10-22-2005 07:23:47




Report to Moderator
 Re: generator help in reply to Ronnie269, 10-22-2005 05:09:50  
My guess is a bad regulator module. Double RPMs will ruin the diesel engine.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy