mtfleming
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Runs fine. Quit producing power. Moved start switch to flash field, did not help. What could it be?
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MEP-002A Not producing power
- Thread starter mtfleming
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Chainbreaker
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How long ago was it still producing proper AC output? Just recently or weeks/months ago? Any power at "Convenience Outlets" on Genset?
What kind of environment is it sitting in? Covered, in shed, on trailer, exposed to elements & critters?
Start with simple stuff first:
With "Engine Off" can you exercise the AC Reconnection Box Switch?
If stuck don't force it hard...try rocking it back-n-forth with gradual increasing pressure that "usually" will break it loose if its stuck. Don't Gorilla twist it, you can break it. Other steps may be necessary to free it. If it's free exercise it full left & right a few times. Then with it in proper setting restart engine & see if you get power out of the convenience outlets.
What kind of environment is it sitting in? Covered, in shed, on trailer, exposed to elements & critters?
Start with simple stuff first:
With "Engine Off" can you exercise the AC Reconnection Box Switch?
If stuck don't force it hard...try rocking it back-n-forth with gradual increasing pressure that "usually" will break it loose if its stuck. Don't Gorilla twist it, you can break it. Other steps may be necessary to free it. If it's free exercise it full left & right a few times. Then with it in proper setting restart engine & see if you get power out of the convenience outlets.
mtfleming
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It’s outside and covered. Just quit producing power this week. We’ve been using it daily. I switched out the voltage regulator, looked at the spinning diodes (did not test them) and I did move the switch back and forth. Still no power. I have not been in the box where the output wires come out yet.
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Chainbreaker wrote: Any power at "Convenience Outlets" on Gen set? This is an important question.
mtfleming
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No power at convenience outlets.
Ray70
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Open up the AC reconnect box and look for mouse nest / damage. That's the most common place for them to build a nest and cause damage!
mtfleming
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Everything looks okay
Ray70
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Probably should ohm out CVT-1 per the TM to see if you have an issue there.
mtfleming
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Okay thanks
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Are you good with the TM's, or need a little help?
mtfleming
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I have a TM for it. I checked CT1 (not CVT) and 1C to 2C reads 0.2 ohms instead of 0.5. Do I need to unhook all the wires to read it, or only the terminals I’m testing?
mtfleming
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All help is appreciated!
Triple Jim
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There are many windings... you need to disconnect wires from only the terminals of the specific winding you're measuring.
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When measuring for ohms, at least one side of a circuit needs to be un-hooked. I always unhook both sides, if at all possible. My mentor in 1973 beat it into my head, and thats just the way I am.
Chainbreaker
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For Reference: Much of where you are heading (same symptoms) are covered in detail in this thread beginning with Post #24 and on:
(5) MEP 002a Not producing Electricity, I am looking for someone who is familiar with the 002a to work on it. | Page 2 | SteelSoldiers
Hope this helps! Be sure to post any new findings or progress back here in your thread.
PS: Its a long thread with a lot of info... but has a happy ending although with a lot of work to get there. Hope yours is a simple fix... diode replacement, etc.
(5) MEP 002a Not producing Electricity, I am looking for someone who is familiar with the 002a to work on it. | Page 2 | SteelSoldiers
Hope this helps! Be sure to post any new findings or progress back here in your thread.
PS: Its a long thread with a lot of info... but has a happy ending although with a lot of work to get there. Hope yours is a simple fix... diode replacement, etc.
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mtfleming
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Thanks! I will check it out.
mtfleming
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On CT1 1A-2A 0.55
1B - 2B. 0.55
1C - 2C. 0.7
Is this enough of a difference to cause a problem?
mtfleming
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I noticed on the other thread that you folks shared that the gentleman read the generator windings. I don’t know where to read them.
Rotating diodes seem to be okay. CTV has one reading slightly low at 2.0 ohms (H3-H4). CT1 readings are a little high at .7, .7, and .65. Generator windings would be like T1-T4, etc.
All your help is greatly appreciated! Also, I noticed that the generator rotor is not evenly spaced between the outer coils, although I don’t hear it scraping when it’s running.
Rotating diodes seem to be okay. CTV has one reading slightly low at 2.0 ohms (H3-H4). CT1 readings are a little high at .7, .7, and .65. Generator windings would be like T1-T4, etc.
All your help is greatly appreciated! Also, I noticed that the generator rotor is not evenly spaced between the outer coils, although I don’t hear it scraping when it’s running.
mtfleming
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Convenience outlet update. It reads 0.3v AC but when I hold start to flash field it climbs to 28v AC.
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Exciter voltage. Main gen will not light off.