Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13

Thread: Mep-802a Won't shut down

  1. #1
    Private
    Join Date
    May 2017
    Location
    Grand Prairie, TX
    Posts
    6
    Thanks
    6
    Thanked 0 Times in 0 Posts

    Tech Mep-802a Won't shut down

    Has anyone else had a problem with there 802 shutting down? I have a Mep-802a I got when it had 200 hours on it, now a little over 1500 hours, and it has always ran and performed flawlessly. About 200 hours ago the fuel gauge started jumping around and stuck at the max fuel level and has stayed there. Still ran just fine. Then about 100 hours ago it didn't want to shut down. I normally run the gen-set for 24 hours+, hot refueling, and when ready to shut down I open the circuit to cool the generator then switch to the off position, engine slows down and dies. Now it slows down and after a minute or two starts to speed back up to normal speed. I've tried to manually close the fuel shut off solenoid but its already closed and won't close any more, I've turned the manual throttle all the down, pushed in the emergency stop button, turned of the master switch but it keeps on running, but will not produce any electrical power. After about 10 more minutes or running it will mysteriously shut off! The T.O.s I have don't have a trouble shooting guide and I don't want to just start replacing parts unnecessarily. Has anyone else experienced this? Any help or guidance will be greatly appreciated. Thanks. I love this site, I've already learned so much from other posts.

  2. #2
    Colonel
    Join Date
    Nov 2016
    Location
    South Hampton Roads, Virginia
    Posts
    368
    Thanks
    206
    Thanked 355 Times in 200 Posts
    Last edited by Zed254; 02-04-2019 at 17:30.

  3. The Following 2 Users Say Thank You to Zed254 For This Useful Post:

    Bigoz (02-04-2019), Guyfang (02-05-2019)

  4. #3
    Sergeant Major
    Join Date
    Jul 2011
    Location
    St Pete, FL
    Posts
    200
    Thanks
    28
    Thanked 163 Times in 69 Posts

    Default

    If the injection pumps are adjusted too far to one side it will do this, basically the governor cant turn them off enough to stop the engine. Not saying that this is the problem in your case but it would be the first thing I would look at. If you touch the pumps you will need some way to calibrate them so they both contribute equally, which would be thermal imager or infrared temp gun. Ive run into this on sets Ive put new pumps on before calibrating them.

    This condition it would act as if the gen set is starving for fuel though, like RPMs should go down. If its not then perhaps stuck parts of the fuel rail or governor.
    It's not that I have too many generators, it's that I don't have enough room.

  5. The Following 2 Users Say Thank You to Demoh For This Useful Post:

    Bigoz (02-04-2019), Guyfang (02-05-2019)

  6. #4
    Private
    Join Date
    May 2017
    Location
    Grand Prairie, TX
    Posts
    6
    Thanks
    6
    Thanked 0 Times in 0 Posts

    Default

    Thanks, It's been running good for two years, it just started this a couple of months ago. When I first start it from cold and let it run for a few minutes it will shut off just fine, but after running at normal operating temperature for several hours is when it doesn't want to shut off. I read a post a year or so ago about "tuning up" your gen-set by running at 130% for a few hours to get rid of carbon build up etc. etc.. I have not done this yet and maybe it would help????

  7. #5
    General
    Join Date
    Feb 2017
    Location
    NY
    Posts
    502
    Thanks
    38
    Thanked 270 Times in 187 Posts

    Default

    Dont run it at 130percent. Theres no more "turning up" than what they did from the factory.

    Follow the links posted above. Not turning off is a common issue.

  8. The Following 3 Users Say Thank You to Bmxenbrett For This Useful Post:

    Bigoz (02-05-2019), Farmitall (02-05-2019), Guyfang (02-05-2019)

  9. #6
    Private
    Join Date
    May 2017
    Location
    Grand Prairie, TX
    Posts
    6
    Thanks
    6
    Thanked 0 Times in 0 Posts

    Default

    O.K. I won't run at 130%. After thinking about it I think I saw running at 130% was on U-tube, not here. I didn't think 130% would do it any good! Thanks for the conformation!

  10. #7
    4 Star General Guyfang's Avatar
    Join Date
    Dec 2015
    Location
    Burgkunstadt, Germany
    Posts
    4,990
    Thanks
    8,475
    Thanked 3,995 Times in 2,008 Posts

    Default

    When you run the generator, about how much load is being applied?

  11. The Following User Says Thank You to Guyfang For This Useful Post:

    SCSG-G4 (02-05-2019)

  12. #8
    2 Star Admiral Daybreak's Avatar
    Join Date
    Mar 2015
    Location
    Northern, Virginia
    Posts
    1,155
    Thanks
    165
    Thanked 1,390 Times in 629 Posts

    Default

    Howdy,

    Cleaning the carbon, and wet stack issues is really running it at 100% for hours. The 130% is only for like 5 minutes. You do not want a prolong running over 100%. Any time a unit is run over 100%, it needs to be watched, listen to, and totally working good. IR thermometer readings, voltages, etc..
    ~~Later Mike

  13. The Following 5 Users Say Thank You to Daybreak For This Useful Post:

    Bigoz (02-06-2019), DieselAddict (02-05-2019), Farmitall (02-05-2019), Guyfang (02-05-2019), NormB (02-06-2019)

  14. #9
    Private
    Join Date
    May 2017
    Location
    Grand Prairie, TX
    Posts
    6
    Thanks
    6
    Thanked 0 Times in 0 Posts

    Default

    Normally the load is between 20-65%.

  15. #10
    Private
    Join Date
    May 2017
    Location
    Grand Prairie, TX
    Posts
    6
    Thanks
    6
    Thanked 0 Times in 0 Posts

    Default

    Do you think carbon or wet stack could cause it not to shut off properly? I've been thinking about hooking up an electric range top straight to the generator and trying to get it to 100% because I do have a lot of black carbon around the exhaust area.

Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •