How to test your Electricity Generator's AVR, Brushes and Alternator on a Brushed Alternator
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- Опубліковано 10 вер 2024
- When your electricity Generator stops producing power or fluctuates, you need to know how to test the Alternator to find what has failed. This video will show you how to do this. Send us your results, and we can tell you which part you need. Contact us via our website generatorguru....
**If your generator has a Brushless Alternator with a Capacitor, please ignore the Brushes step of the testing."
This test was invented by our Founder and is called "The Beagley Testing Technique." With this test you can find out what has failed in the alternator. By default you can discount faults in the alternator allowing you to determine if the AVR or Capacitor has failed. Normally you need an expensive tool to test AVRs and Capacitors at such a high voltage. With this testing technique you can do this with a standard multi-metre!
If you have any questions please email us through your local Generator Guru website.
We are always happy to help. We also sell 1,000,000 generator parts and pro tools on our website with quick shipping.
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We thank you for your interest in our help videos. Unfortunately, due to limitations in UA-cams comment sections, we are unable to quickly
answer questions in the comments. Please feel free to contact us directly here: www.generatorguru.com/need-help/
PLEASE NOTE: You cannot test the AVR without a very expensive piece of kit called a Megga meter. This is why you need to do these tests to make sure there is no other problems in the Alternator. This will discount any other problems leaving the only possibility being the AVR.
you need to show,or tell,what happens when certain items blow. . my geni reved up. trying to find out why. the shop said,its chinese,buy another. there not interested. its remote start,key,pull,3.500 w. inverter. i have an old subaru,10 yrs,still going,but noisy as hell. 5kva. need a more portable geni. so bought the inverter.small suitcase size.
I have never commented on any of the hundreds (if not thousands) of UA-cam videos I've watched, but I am beyond grateful for this. I promised a client of mine that I would fix his generator, which I've never done before. More than 5 hours and many YT videos later, I still hadn't figured out the issue. The brushes were shot, everything else had continuity. Replaced the brushes, but still no power. You are the ONLY person I found that pointed out that the positive wire always goes on the left side of the brushes. I just hooked them up how they were before (another shop tried to repair). All of a sudden, IT WORKED!!! So, thank you so much for your help. Very grateful for you.
💯
I am so glad we could help! If you need any other info we have an interactive help centre which can help you fix most generator issues: generatorguru.com/need-help/>Engineering
I find it interesting that people who really understand what they are doing make great simple instructors. No complicated garble that the watcher doesn’t understand anyway.
Thanks! *blush
Thank you a thousand times!! You were very instructive in every phase of showing how to properly troubleshoot a generator. You even took the time to show the proper settings on the multimeter for anyone who needed help. Your a blessing. GOD bless you.
Exactly what I needed and right to the point I wish 99% of the other instructional videos were like this one !
Aw! Thanks sop much!
I had a loose terminal on a new duromax 8500 which fried the avr.. They sent a new one but it was only putting out 109 volts on both sides . The avr had an small adjusting screw and I turned it and adjusted it to 120 . Works perfect now.. Thanks for the video
Ummmm.... you should not be adjusting that screw! They are set at the factory and now you have just changed the hertz output!!! That is not good!!!!!
IF IT HAD CORRECT VOLTAGE BEFORE THE AVR BLEW - Run the test in this video and follow relevant steps below.
IF GENERATOR IS COMPLETELY BRAND NEW:
Best to set it back to 109 then adjust the speed by the top screw on the carb. Use voltmeter to set to the correct voltage.
Before you do that. be sure good fuel flow is coming from the tank as the Petcock has a filter behind it which might be blocked.
IF GENERATOR HAS RUN FOR MORE THAN 1 HOUR:
If you were getting low power and it is NOT totally brand new, but has some running time on it, this is what you need to check:
1) it needs servicing. (1st service best done at 50 hours as loads of metal shaving are produced as it settles in) - see ua-cam.com/video/ioAgCqPhUfg/v-deo.html
2) The engine has settled in and valves need resetting. This needs doing after about 1st 50 hours - see valve setting on our website and follow this video: ua-cam.com/video/mYrdnPVmaDs/v-deo.html
If you need more help please contact us on generatorguru.com/need-help/ and we can assign you an engineer. :)
The generator is running at 60 to 61 hertz. This was tested with an Ideal sure tester
this is actually helpful. every other video I've been finding requires jumper cables to test the AVR. didn't think about testing the generator itself.
Followed your tests and ended up replacing AVR .Bingo, fixed it.$17 .Thanks
Nice work!
Thank you so much! This video saved me weeks of ordering parts, dropping them in and finding out they didn’t fix it. You are the best!
Thank you so much for your Comment! I have patted my team on the back and passed your thoughtful thanks onto them. We really appreciate you letting us know.
Would you be able to leave a review for us on trustpilot? We have recently signed up with them and would like to spread the word and help save more Generators. If you could be so kind, please leave a review via this page uk.trustpilot.com/review/generatorguru.com
Thanks again for your feedback!!
Generator Guru back in the early 70s, I was taught by my grandfather, how to rebuild generators, alternators and starters, with the simplest tools available, close to 50 years I've only had to replace one generator to an alternator, switching over a 1960 Ford F-100 Excellent video, really enjoyed it.
Thanks brother.. Very well explained.. Great effort.. You saved my generator from selling lol
Subscribed your channel 👍
We thank you for your interest in our help videos. Unfortunately, due to limitations in UA-cams comment sections, we are unable to quickly answer questions in the comments. Please feel free to contact us directly here: www.generatorguru.com/need-help/
Straight to the point and a very good guide for generator troubleshooting. You have earned a sub!
Thank You! Finally a video on fixing a generator with brushes that makes sense. I am finally now able to narrow down what the actual problem is. It is the AVR. Thank you again for the awesome video.
This has been the best instructional video I have found on you tube. Thank you for taking the time to demonstrate the testing. Now I have a question not really covered. I have 4.7 v to both the R1R2 and L1 L2 and 0v on R1L1 but I only am getting 1.7v across the brushes. The surface that the brushes are riding on are smooth. I thought these were grooved. I am looking forward to your expertise on this.
Gary
Thanks for the feedback! R1 and L1 should be 0 vac if you have a voltage changeover switch and set it to the lowest setting. These results indicate you need a new AVR. The AVR should bring up the rotor to 5vac also if you run it for 20 mins without load to stabilize the magnetic field. Your brushes will be smooth where they connect to the rotor, but be sure they have enough play in them to make a good connection. If you are still having any trouble please let us know and we will be happy to advise you further. :)
Sorry I should have added that I have already replaced the AVR. This unit has only been used a short time. brushes are not even worn in yet.So are you saying I should run it 20 minutes with the new AVR? one last question. This John Deere 6200 watt runs wide open all the time. Is that normal?
Generator Guru sir i changed the Generator AVR but the voltage is still not stable ..when i start some things on it becomes decreasing voltage from 220 to 195..
i think the AVR frequency is not set... how i set that frequency
Very good demo. Nice, clear explanation. I thought I might mention though - that the rotor is not "otherwise known as the stator". The part you call "the windings" are the stationary part of the generator - the stator. The rotating part of a generator or a motor is the rotor - whether it has windings, permanent magnets or a squirrel cage structure.
Hi Ralph
Thanks for getting in touch! A few people have pointed it out over the years, a bit of a slip of the tongue we didn't spot until after we had posted the video, it used to have a little tag at that point in the video apologising but youtube seems to have dropped the captions off and won't let us replace them as its convinced they are still there!
The diodes on your rotor have blown. Check to see if they are accessible (usually on the end of the rotor or the fan end) if so replace them. If they are "in" the rotor you can take the rotor and windings to your local "motor rewind" company and they can rebuild it for you. But worth calling g a few companies as price varies greatly!
Thank you,
With your help I located the brushes on the Hyundai 7000 and cleaned them so it works again.
Genpower were useless and argued over warranty times so much for the platinum warranty!
Kind regards
Andy
Thank you for your feedback! We pride ourselves on "Good old-fashioned customer care!"We strive every day to save generators and other machinery from being scrapped due to parts not being available. It helps every-ones pockets and prevents tons of CO2 being added to our ecosystem!
Hi, Generator is outputting around 3.5- 4V on the brushes and 4 - 5 V on the L1, L2, R1, R2 and when I tested the L1 - R1 I was also getting 4 V but im only getting 8V on the 230V output on the generator. what could this error be?
+Rick Saffery
You cannot test the AVR without a very expensive piece of kit called a Megga meter. This is why you need to do these tests to make sure there is no other problems in the Alternator. This will discount any other problems leaving the only possibility being the AVR.
Generator Guru my UST 2300 reads 145-190 vac and HZ reads 75-79 time to scrap it?
John,
These are the results without the AVR attached during testing? If not please test without it attached, if so, then follow the next step.
If the hertz are that high then we would be questioning the speed of the engine. First, check the Governor Rod and all springs are in good order (especially the one over the rod to the top of the carb as a little play in the spring will greatly affect this.) Also, service the engine to be sure that nothing has gunked up the governor which sits inside the engine as this adjusts the speed.
In North America, you want 60hz (50hz for European or Auz regions) so you need to slow down the engine if neither of the above is the case. On your generator, you can do this with the screw at the top of the carb. Turn slowly anticlockwise until you get the desired Hz. If this does not work you will need to replace the governor inside the engine.
If you need parts we hold them for your generator. You can buy online on www.generatorguru.com/
We DO want the test in volts (AC. v~). I keep getting emails saying otherwise, but we are doing a different test.
Hey man. Thank you. You made my day. I didn't loose magnetism, just had to change the avr (because i mistakenly connect the public power source to my generator. Turned the thing into a motor in a flash ruining my avr in the process. . That's a awesome guy you got there. (the black cutie) Thanks a lot
nice one
That was a very well explained and informative video. It removes some of the mystery about what's inside the alternator, and teaches the ordinary lamer some basic troubleshooting tips. Thank you.
this is the first video i have seen on generators having a problem with mine and youre the best so far fully understand everything
Thank you for the feedback!
Thank you for your excellent and most helpful video. I tested my Firman 4550/3650 and the results were not what I was hoping for. Across the brushes 13.28 L1/2 .38 R1/2 .34 and I didn’t bother measuring L1/R1. Please confirm my worst nightmare about this generator. Thank you again for sharing your time and knowledge.
Sorry! The rotor diode has blown. If you can see it on the end of the rotor you can remove and replace, or take it to a motor rewind shop and ask if they can change it for you. :)
@@Generatorguru thank you. Have a merry Christmas.
I agree that this is the best instructional video. Might want to do it for companies and get paid for it.
Generator guru gave me more help with my hyundai generator that the importers of the generator.
So happy we could help! Thanks for the feedback!
@@Generatorguru How are you with hyundai diesel engine parts?
Thanks to you and this tutorial my generator works again. Greetings from Holland.
I am very much curious, how much resistance reading is expected across the slip rings of the rotor, and does it vary, depending on the power rating of the generator? Very informative video by the way, thanks for the clear demonstration.
Thanks!! Resistance varies from generator to generator, and not all generator companies publish them. Hence needing a better way to test the alternators, and we came up with this! It is called the "Beagley Alternator Testing Technique" and was invented by our company founder many many years ago! :)
Excellent video. I learned so much and learned how to diagnose my generator properly... Thanks generatorguru!!
Very explicit and concise. You're the best.bless you
hi from argentina, your video was very helpful to me, you explain very well all the trobleshooting, thumb up for you, thanks
What's that you say? Ahhh! Now I can hear you. I have to remember not to test my AVR on a windy day I guess...THANK YOU!! very content rich. Love that.
Stephen,
Thanks for getting in touch.
Yes, we find on some computers the sound works perfectly, and on others it is impossible to hear. If you have any questions please contact us www.generatorguru.com/need-help/.
We have in planning stage, a new version of this video and a poster for step by step instructions.
Thanks for your feedback! Hope it was helpful even with the sound quality. :)
nice video. The only technicality I see is your explanation of a rotor and stator, two distinctly different parts. Keep up the great work! This was a very informative video!
Yeah I got nervous during filming. I did add a note over it on youtube, just after I uploaded the video, to say I got them mixed up but over the years it seems to have disappeared with all the updates that UA-cam have done. Thanks for pointing it out. I will try to get that reinstated. :)
Excellent video and obviously you know what your doing and gave great advise. Thanks for sharing.
Great video.. now I’m headed out to the shop to use what I just learned on a generator. Thank You
Glad we could help
So nice video..thanks teacher..i continue following you from República Dominicana..
Very helpfull. I have a DG6, it looks like I have to remove the muffler first to access the end of the Alternator.
Thanks for your help.
David from NZ
If you have the super-silent version, You might be able to find the Capacitor (or AVR in some models) from the back panel held on by the 10mm bolts (some models only). If not you will have to remove the exhaust... sorry.
Thanks *Blush.*
He is 1/2 German Shepard, 1/4 Lab, and 1/4 Rotti. He is 8 years old now, and accepts that I talk to a tripod... Don't you love dogs, they accept you for who you are without question, even when you look nuts and talk to yourself.
Thanks for your feedback
Very good explanation of the fault, will serve me much thanks
Always happy to help!
Excellent video. I would have appreciated better close-up shots but I think it was good enough to give me the general idea.
Hey thanks for the info We will try to rectify this in future. :)
(PS. sorry about the delay in answering, for some reason UA-cam sent this question to the "junk" folder. We apologise for the inconvenience.)
Excelente explicación, sencillo y concreto
Thanks! If you need any further help or parts, please visit us at www.generatorguru.com. :)
Thanks for the video, this is one of the better, more informative videos on this subject! The service manual for my EB6500SX is about $150, USED, so, you might have saved me that money!
Glad it helped
What are the symptom of bad brushes? I recently replaced my AVR. I did not replace the brushes as the ones that came with the AVR seemed awful cheap. Now I'm curious if I should have replaced them anyways.
If you run the test on the Armature (Rotor) with the brushes fitted you should get a constant 5vac. If not replace the brushes. If you have any questions you can contact us via www.GeneratorGuru.com and we will pair you with an Engineer who will work through it with you. :)
I get 94mv DC from brushes which move and look like new. It's a very steady 94mv too. I get 4.14V AC from tests #2 and #3. I get 0v AC from #4. Unit is 3 years old and only got used when new for a few hours. Looks exactly like the one you are working on. I did have it set to 110V like you said. I know AC from DC and I also had the + wire to brushes marked from the OEM. Is the left one too. The rotor assembly is USD $180. Is that the problem here from the info I am giving you? Rotor is clean and shiny. Very clean unit, stored inside. The brown wire(bottom nut) had a bit of rust and corrosion. Is clean now. Great video, only of it's kind!!
What are you getting in Volts AC on the brushes? In need this to tell you what the state of your rotor is. The other tests (on the windings) are good, so there is not problem there. Look forward to hearing from you.
thankyou very much for your effort and sharing nice video. but i was little bit puzzled during video how can multimeter gives 5,10 volts without any supply. please elucidate this point.
Good footage and really helpful. I have just tested my generator that wont give power. Across the brushes 4.8 volts. L1 and L2 11.3 volts. R1 and R2 2.2 volts. R1 and L1 7.8 volts. Just need to work out now what that actually does mean 😀
You alternator has blown. Sorry! You need to either replace it or take it to a motor rewind company to see if they can fix it for you. :(
thanks for your video helped me alot.I repllace avr on my generator brushes are find but .dont have power .
Then how did the video help you at all then I dont understand really
Don't cry! Yes you are correct in some countries it is called the Stator. It is also known as the armature and the rotor. We sell all over the world so use all these terms.
Need advice on how to fix your Generator? We have Generator Engineers on Chat on our website, ready to guide you through the repair.
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Very usefull video, thanks a lot for your teachings.
You are welcome
Helpful video. Thanks for sharing.
Glad it was helpful!
Usted tiene un excelente canal, muchas gracias por compartir,
Saludos desde Veracruz México.
Gracias por sus amables comentarios.
Thank you for your kind feedback.
Outstanding video, very helpful Thank you.
Thank you for the guide! Very helpful
I gave this video a thumbs up but I have to say, the rotor is NOT the stator. The rotor "rotates" and the stator is "stationary"> The stator is the part he calls the windings. The windings are in the stator.
Yes we had a note on the video but over the years youtube has changed this and we are unable to add it back on. But you are completely correct. I just got nervous in front of the camera and got mixed up. Sorry for the confusion.
Probably 1 of the most helpful and easy to understand videos I've seen. Especially as I'm trying to diagnose my genny which has stopped producing power. I've tried the drill technique and I've tried the flash with a battery after disconnecting the avr. Neither have worked. Tho the genny did produce power for the few seconds I flashed it with the battery. So now I'm wondering if the avr is fried as we noticed water in the extension lead that was plugged into it. So I'm thinking that has sorted out the avr to protect the alternator like you just mentioned it should!
For fault finding or technical advice, feel free to contact us using the link below
www.generatorguru.com/need-help/
This will allow our engineers to review your query and give you the best possible advice!
How far have you got? Might be best to chat to a Guru on our website. We are always happy to help! Search "Generator Guru" in google to find us.
Woow im going to check my Generator !! Thanks for the video!
hello this video helped me out in a big way thank you... i have a tested brushes and the winding here are my results L1&L2 16.3. R1&R2.099 R1&L1.191 across the brushes 75.4.... if i heard right you said if the brushes read higher then the windings it would be the rotor?
Sorry for the delay in responding. We have had a few technical issues on our UA-cam and were unable to respond. Yes you are correct the rotor is failing.
As your Alternator has failed the tests, you need either replace the rotor, or to contact a local “Motor Rewind Company” to see if they can fix it. These companies can vary in price, so if you have time, it is worth getting a few quotes.
No the L1 & R1 reading tells me the windings are arcing. Remove the winding and have a look to see if anything has got ground up between the long fins. If so remove carefully and reassemble. DO NOT USE OIL ON THESE PARTS! (you may not but many do, and oil and electric do not mix!) If this is not what has happened take the winding and the rotor to your local motor rewind company to be rewound. Hope this helps! If you need any more help call us. Our website lists our number. :)
i have a problem with my genset..... its only 30kva brushtype... but has no voltage output... i disconnected avr.. and performed field flashing ... i supplied to the rotor 12vdc just for seconds.. and i got only 100vac low to its rating 220vac... without the supplied 12vdc at the rotor i only get 1.5vac output,, too low for an avr to work on.. i did check the brushes but they were dam good... no loose connections.. rotor resistance is 3.5ohms... .do ihave to repair the whole alternator... can i ask some advise for some of your experience? i need some ASP!
If you have a capacitor then you need to have a look at my video for Brushless Generator Testing.
You cannot fit an AVR unit to a brushless alternator without replacing the whole alternator and wiring system. It would be cheaper to buy an new generator, and a lot less hassle!
Hope this helps!
Hi, I have a 3KW Suntom single phase diesel generator. It was ok, but now only producing 85Volts AC. I have followed your instructions, I have 1 volt across brushes, brushes ok. 4.8 Volts on L1 L2. 4.9 Volts on R1 R2 0Volts R1 L1. Do I need a new Rotor?.
Thank you! Very informative.
A great video, easy to follow. Please keep them coming
I ]'m wondering what the electrical problem is when my Predator 6500 watt genset produces about 20 volts on the rotor when checked running as in the video? Will there be shorted windings then?
Can you please contact us with a full set of results here www.generatorguru.com/need-help/
Regards
The Generator Guru Team
I have a question I got a champion 4 k generator it just started doing this out of the blue when you put a 1100 watt load on the initial startup my window ac unit on the generator makes a buzz like sound coming out of the generator head what is causing this? now if I run my coffee maker that's pulling 1500 watts continuous it's absolutely fine?
+Brandon Setzenfand We think it is best you call us to discuss it with an Engineer. Contact your local office via our website. www.generatorguru.com/ :)
Generator Guru, I get 1.7 VAC on all 4 tests R1 to L1 included. Honda EB5000 HELP! Thanks Ed
Do you have a voltage changeover switch? If so make sure it is set to 110/120v. If you do not have a switch there may be a reading on R1-L1. This means we cannot test if the windings are arcing.
Generator Guru Switch was set for 110v. Thanks for you quick reply. !.7 is low too isn't it?
Ed Lewandowski also should I have the breaker on or off on the control panel?
Ed Lewandowski
Yes it is low but an AVR should rectify it for you. We are much more worried if the voltage is too high. The breaker position does not make a difference to the readings.
Cooper pipe freeze spray works too. But make sure you wear gloves, especially when spraying down the bolthole. Don't want to freeze your fingers. :)
Top vid , cheers mate . Very informative.
Glad you enjoyed it
For some reason we are not able to reply via UA-cam to questions at this time. If you have questions please contact us via our website. GeneratorGuru.com
It could be that the floater in the carb is stuck. I suggest a good clean, and inspection of the whole carb. If there is old or dirty fuel it will allow to much fuel through to the engine.
The only other thing it will be is a governor problem, but this is very rare.
Verry good !!!! thanks s lot , mam
Always happy to help! FYI... We also have loads more info on repairs and maintenance on your website if you ever need it. :) www.generatorguru.com/need-help/
Can you please clarify what the n v v u represent. Also which generator (make and model) do you have?
Your rectifier is reading a bit high. I would suggest replacing it.
Rotor needs attention.. Windings may not but need to fix rotor and re-test. Check the diodes on the rotor and replace if possible. This should fix it for you. Some do not have the diodes showing. If that is the case take the rotor and winding to your local "motor rewind" company and they should be able to rebuild it for you. Hope this helps :)
Hi Thanks for the great Video, after following your great instructions I have come to the conclusion that my AVR is toast, I have an old Colman Powermate 5000 which i can no longer get parts for, my question is, can i fit a substitute of equal output ? thanks for any help.
Please contact our Engineers by submitting a ticket here: generatorguru.zendesk.com/hc/en-us
We will assign you an Engineer to work through the issue with you. We do not charge for this service. :)
Que bien por la traduccion al español seguire en contacto
Well you need to run this video to get the results for the readings.
In respect to the engine not starting, sounds like it needs a service. Change the oil and fuel (over 6 months it will be stale) and clean off the spark plug. Chances are that will fix your starting and may even fix the electricity problem if the thickened oil id keeping the engine revs low.
Hope this helps.
Hi I have a 2 yo 9000W/7200W Champion generator. It runs fine but it stopped outputting AC. The small digital intelligauge is not showing any reading anymore either. Could you point me in the right direction to start troubleshooting?
Thanks
We would be very happy to help you! Can you please contact our engineers about this. It will need some more investigation, and we can send you the tests to do via email. Please contact them via our website: www.generatorguru.com/ask-the-guru/
An inverter AVR is very large (at least 200 x 250 mm) and most of the generator models will have an "i" in it. e.g. kge1000ti
Capacitors only have 2 or 4 wire connections.
Therefore everything else has an AVR.
Hope this helps :)
I seem to have a problem, I'm using a gentech 5kw alternator (with a honda 9HP engine) and i noticed that the generators voltage drops to almost 180v~ from 250v~ under 3 kw load, The engine doesn't seem to bog down, however, when i pulled a small bit on the throttle, the voltage rises a fair bit (i didn't want to push it past 260v) I initially thought the Regulator was bad, so i opened it up, however there didn't seem to be a regulator in sight! the only thing i did see was a large capacitor (something you would find on an induction motor for starting)
Any ideas?
My only answer would be that the regulator is perhaps between the engine and Alternator cooling fan?
(also there was no brushes that i could see at the back of the alternator, but there was an exciter winding.
Thanks Tau
Can you call us? We would love to help and talk you through it!
Our full contact details can be found on our "Contact Us" page here: www.generatorguru.com/ask-the-guru/
hi, my brother very good i like this video, congratulations from Venezuela !!!!!!!!!
Was your voltage changeover switch on the lowest setting? If so you windings need replacing. L1 & R1 should = 0v ac
Good day, my Armature gives a reading of 2.6V at the brushes. The Winding a reading of 6V (220V country) and the AVR an output of 12.5V but still no power. What can be wrong still?
You need to change the AVR as it is not exciting (capacitor inside has blown). Please look up your generator on our website to locate the AVR you need. Contact our engineers if you need any help finding it. :) generatorguru.com/
hi a I've a neilsen 6500 generator I've a problem with the 110 volt output it's keeps tripping the in line fuse to the 110 volt sockets but it's fine with 240 volts .what could it be .I've put another in line breaker in and it tripped that as well .any ideas!??
+Robin Tustin
Have you run the tests? What were the results?
thanks to generator guru. your video is very much educational, please i need your assistance. i bought a working core and armeture and core for 2.5-3.0 kva generator but i am having deficulty on the connection of the core and panel
Hi! Please contact us on www.generatorguru.com/contact-us/ and we will assign you an Engineer to help. :)
Fantastic explanation,
So R1 and L1 tested together should equal 0 volts? Mine reads 4 to 5 volts on R1 and L1. What does that mean?
My brushes read 7 volts, and R1/R2 and L1/L2 both read 4.5 volts...
Please set up a ticket with our Engineers to discuss further as there could be a few reasons. (We do not charge for this service.)
www.generatorguru.com/need-help/
oui s'il vous plait alors j'ai besoin d un aide, je suis an train de repare une generateur elle me donne d'un courant mais le courant qu'elle me donne n'as lume plus mon anpoul, alors svp,comment je peut l'a reparer?
Merci de nous avoir contacté. J'ai essayé de traduire votre question avec google translate, mais il sort étrange. Pouvez-vous reformuler la question pour que nous puissions la comprendre? Avez-vous des lectures que vous pourriez nous donner?
Pinceaux
L1 & L2
R1 et R2
L1 et R1
Si vous avez un interrupteur les changements volts - oui / non
Nous attendons votre réponse avec impatience.
Hello I have a Troy Bilt Model 52405 generator and I have found the parts list. It says that I have a rectifier is that what you refer to as an AVR? It also has a capacitor. It is not producing power. After I shut it off I measured 90 volts dc on both the rectifier and tha capacitor. Would this be normal?
Steve, Thanks for getting in touch. You will either have an AVR (5 wires or more) or a Capacitor (2-4 wires.) The generator also has a Battery charging Rectifier to run the 12v charging system (for battery or using the 12v on the panel.) As your getting 90v on the 12v system we feel we should get you to talk to one of our Engineers. Please open a support ticket with us via www.generatorguru.com/need-help/ >Engineering>Alternator>Not inverter>I need more help and explain what you have tested so far. We can then assign you to a Guru. Look forward to hearing from you. :)
Hi I have a generator wolf wp7500e that keeps blowing the avr I’ve done your tests but my test results across the brushes only gave1 volt not your recommended 5 ? what would this mean and the others where 2.65volts not 5 volts but as you say this maybe ok ? Also I tested the resistance between the slip ring and the casing of the generator /and end of rotor bolt and that was around 30ohms I thought this should have no continuity? Please let me know your thoughts thanks chris
Hi Chris
That sounds like the diode/resistor packs on the rotor is failing, they are in place to regulate the rotor voltage, if they are failing, you will not get the ideal voltage reading and as the rotor voltage can vary further when the AVR is fitted to it and the gen running, it is more likely to blow the capacitor in the AVR, I would recommend taking it to a motor rewind company for a repair, It also sounds like there is arcing, normally caused by worn away coating on the copper coils
i have a troybilt/briggsstaton,mod#030429,produces 2.5 volts,no avr or test points(li r1)as shown in your video,whats wron w/it
I have a Generac GP5500.I am only getting 1.2 volts across the brushes,do I need new brushes?My generator doe not have a voltage changeover switch.I am getting 4.1 volts on the other readings.
With a result like this, I would remove the brushes and check for wear. It might be they need replacing too. You should have a good contact with the rings and have enough play in them to keep them tight on the rotor. Replace if you are not sure.
The reading do not indicate any problems with the windings, so replacing the AVR will be the next step.
If you need parts, we sell them on this page: www.generatorguru.com/gp5500-gp5500e/?sort=featured
Muchas gracias.
Happy to help!
I have a Champion 3.5kW portable generator and it works well for about an hour, then continues to run fine, but stops producing power. Testing at the GFCI outlet shows about 4.3v when it is not working. Testing across the brushes with the AVR disconnected shows 25 volts. Testing L1-L2 and R1-R2 shows about 3.7 volts on each while testing L1-R1 shows 0 volts. Given these readings, I assume that the bridge rectifier/my rotor (if the rectifier is not replaceable) are failing. A commenter on here mentioned that his unit's RPM was too high resulting in this condition and my unit does seem to rev a bit high. I further assume that no-load revs should be about 3,800 RPM, like most power equipment.
Any chance its my RPM and my rotor is OK? Just not too sure how RPM and brush AC voltage with the AVR disconnected interact.
Thanks for a very informative video in any case!
Hi! Thanks for getting in touch!
We are having issues getting UA-cam messages and really want you to talk this through with our Engineer that specialises in your generator.
We can get an engineer to have a look at the results for you. We don not charge for advice, but, you will need to contact us on our website so we can get the right engineer with experience of your generator to assist you. :)
www.generatorguru.com/need-help/ > Engineering & follow the questions.
We are always happy to help!
P.S pls state your location for the correct RPM requirements. It will depend on the hz used locally. :)
I only get 2.2v on the brushes. And from there around half the voltage on other checks. Could this be the rotor ? Any help is much appreciated
The next step is to flash the alternator with a drill. If you need any help please contact our Generator Engineers on our Help Center and they will be more than happy to help.
generatorguru.com/need-help/
thanks mate, wish you nothing but the best, your a champ.
Saludos, excelente tus explicaciones,muy buen video.atentamente José María García Yamin
Caracas, Venezuela.
Thank you your feedback is greatly appreciated
Gracias, sus comentarios son muy apreciados