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Thread: MEP 831 FAQ for owners or potential buyers

  1. #41
    General robson1015's Avatar
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    The test light for the load terminals lights green as it should but none of the other lights work.

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    General robson1015's Avatar
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    I contacted several parts dealers on the internet today and received a price quote for the fault indicator panel. $844.00. That's correct-- eight hundred and forty four dollars for one circuit board with lights and test switch. I didn't expect to get ass raped!! After I sent an ugly message back I continued the search. I tried to contact the company that manufactures the part for the military - TRC (Technical Research Corp) in Clearwater Florida. Could not get connected to a live person, left several voice mail messages and got no call back. I sent several e-mail messages to them also with no luck. I called the operater and she kept connecting me to a recording to leave a message which I did. Talk about a circle jerk !!! The fault indicator module looks like $ 40 dollars would be a more than fair price to pay. I disassembled the one I have and it looks to be a sturdy, well built circuit board with a push button switch. The generator I have is the MEP-831A with 4 hours run time. I am assuming once again that the 4 hours is test run time and that everything was tested including the fault indicator lights/ reset button. I paid $700 for the generator and it looks like factory new. I thought that was a good price for a quality American Military generator. Starting to wonder about the parts game for these.....Any suggestions ???? Thanx in advance

  3. #43
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    I have a parts unit that I'm considering selling some stuff off once I have the main parts I need off of it. I may have a fault indicator I could part with. I won't know for a few weeks though. I'll want to make sure it is OK.
    Chris Medico
    MEP-003a (sold), MEP-803a, MEP-802a, & MEP-831a

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  5. #44
    General robson1015's Avatar
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    That would be great DieselAddict, let me know. I'll keep searchin in the mean time.

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    General robson1015's Avatar
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    I tested the voltage to the fault indicator per the manual. No voltage - the manual states to replace the fault indicator if no voltage is found. Should be between 20-34 volts. I found one on e-bay for $70. It's on the way. I hope that will fix it. Question - Would there be any reason that someone would disable the fault indicator??? Also there is a plug on the right front of the generator that is labeled generator start. It is a multiple pin plug with each pin lettered a,b.c,d, etc. Is this a remote start plug or something else????
    Does anyone know if the extra pin plug would cause problems for the fault indicator??? Seaching for answers - thanx

  7. #46
    General robson1015's Avatar
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    IMGP2941.jpgIMGP2939.jpgIMGP2940.jpg
    Here are some pictures of the plug. ???

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    General robson1015's Avatar
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    The fault indicator is not the problem. The bottom of two of the three electromagnetic relays looks burnt. I ordered three new ones. Hoping this is the fix.
    Starting to think I'm in here all alone....

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    As for the no voltage condition, you may want to check that the pins in the Canon plug aren't corroded. Replacement pins are kinda cheap (<$1) pn#66361-4 and socket for the pin pn#66101-4 (anywhere from 50cents to $1) need to get the $15ish tool to extract them as molex pins are ever so slightly different. I had 3 pins and 1 socket go bad on my 831. As for the additional "generator start harness" it looks like the location and setup that SolarStik uses as can be seen on their website. I guess its a solar system with generator backup deal. Good luck on the relays being the culprit.
    Last edited by TooMuchWork; 10-09-2015 at 01:57.
    (1) MEP-831A "ghost short" 395hr; (2) MEP-803A runner; (4) MEP-802A "2 parts & 2 runners"; '84 M1009 20k miles. All a work in progress.

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    Make sure the relay all the way to the right K15 is a 120 volt AC relay.
    Sometime they install 3 24 volt DC relays and the coil burns up on the K15 relay.
    The other 2 are 24 volt DC relays.
    The 3 kW 400 Hz units have 3 DC relays.
    They look the same.
    Some time when they are troubleshooting the sets they remove all the relays and then re-install them incorrectly and they misplace the DC relay into one of the other relay sockets, so check them all to see if you have a misplaced relay.

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  13. #50
    General robson1015's Avatar
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    Very good info Dewey - THANK YOU. I ordered three DC relays because the manual only shows the DC ones. I will check this out. Thanks for helping. I think the pins are OK-not sure how to check them but everything looks pristine.

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