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  1. R

    MEP-531A not working due to electrical issues

    Honestly - I can't remember that far back. The TM is posted on this site. It is what I used. I don't have a 9 volt battery so just used a weak car battery and length of 18 ga wire to limit the power to the field. It only takes a couple seconds of power application to flash the field so it's not...
  2. R

    MEP-531A not working due to electrical issues

    6 month update. I cleaned the stator housing using brake cleaner to remove the oil and dirt from between the stator laminations and the aluminum outer shell. I warmed it and allowed it to dry over night. I then mixed 5 minute epoxy to seal one side of the stator to the shell. I then turned it...
  3. R

    MEP-531a

    Honestly - you've already found a great resource. And...it's free! There are a number of folks here who can help if it is needed. Don't bother with your typical service centers. No one knows these. You do not want to pay hourly rate for someone to learn the particulars of your genset. There are...
  4. R

    MEP-531a

    There is a military kit available that allows using a jerry can for fuel. Or simply use a larger fuel tank with a gravity feed hose. The fuel system is set up for simple gravity feed. You could get a rubber bushed fuel fitting like used on the fuel tank from snowmobile dealers. Then just use a...
  5. R

    MEP-531A not working due to electrical issues

    Well, I mucked up. The stator housing was slightly loose on the stator - as evidenced by the 4 stainless steel rivets showing some movement - one having worn or broken through the sheet metal housing. I changed the wire on one of the MIG welders to some 308 stainless and welded the rivets to...
  6. R

    Detroit 6v53 in an M35A2

    I've driven some 4,000 hours behind a 6v53 in a 1966 Diamond T boom truck. I've got the hearing damage to show for it. Still have the ole girl. I'm second owner for it. It has a 5 speed and a 4 speed aux. 1st on the aux trans is for off road only. 2-4 are for splitting each gear of the main...
  7. R

    MEP-531A not working due to electrical issues

    I had contacted Dewey and did not hear back. So - I ordered from Arrowhead Electric. Well, Dewey had forwarded my request for price quote on replacement brushes to Argo Turboserve. An Argo representative sent me an email last Thursday asking how many brushes I needed. I replied that I wanted 2...
  8. R

    MEP-531A not working due to electrical issues

    Well The brushes I ordered can be reworked to fit in place of the original brushes. I got obtained them from Arrowhead Electric at www.carbonbrush.com I used their part number 159A803P06 which cost $13.80. The brush is slightly longer than the original. The brush is supposed to be .875 inches...
  9. R

    MEP-531A not working due to electrical issues

    Well.....I know what you mean by glorified pencil lead. I was tempted to put an arc carbon in a tool block and mill it square to make some brushes. Back in my youth I tore carbon/zinc batteries apart for the carbon rod for experiments. Do understand that there are a multitude of grades of carbon...
  10. R

    Dewey MEP 531a running horrible

    The return line is only for fuel leaking past the injector components. Typically only single drops of fuel over minutes of operation. It could take hours of running to notice fuel in the line. Mine ran as you state yours does. I found the valves were terribly out of adjustment.
  11. R

    MEP-531a

    Is it in pieces? If yes - cleaned well with acetone it can then be glued with super glue (Cyanoacrylate )
  12. R

    MEP-531A not working due to electrical issues

    I found a company who sells a brush that should be similar but longer than stock. I've got a couple coming for about $35. including $7.50 for shipping. I'll post how they work out.
  13. R

    MEP-531A not working due to electrical issues

    Ohio Carbon came back with a quote. Sheesh. $14.08 each plus $19.07 for shipping. $75.39 for 4 brushes. I've never paid that much for brushes before except for a welder and those were large enough to make a number of these size from. Does anyone else want some? I could get them shipped with...
  14. R

    MEP-531A not working due to electrical issues

    Hi, Thank you for the detailed reply. Thankfully I was able to get it working after flashing the field and then getting enough output to get the bad fuse holder to become evident. Swapping the spare with the bad one got it working great. I pulled it apart because I was very concerned about the...
  15. R

    MEP-531A not working due to electrical issues

    Well, I got it working. I figured out which terminals on the terminal strip were for the field and I flashed it after first disconnecting the voltage regulator for safety. Then started the unit. It still didn't have output but this time rotating the instrument fuse resulted in the voltmeter and...
  16. R

    MEP-531A not working due to electrical issues

    I performed a continuity test of cr-2 diode feeding the circuit breaker and is is functioning. It has 596 ohms resistance in the forward direction. I don't know if this is within spec though.
  17. R

    mep gen sets

    Another option is to put items like refrigerators & freezers on timer controlled circuits so that they can only take power at certain times. This allows you to set which items can run at any one time. Paragon makes good quality timers.
  18. R

    MEP-531A not working due to electrical issues

    Hi, I just bought a 531a with 1380 hours on it. It wasn't running well due to poor maintenance - such as .064 intake valve clearance and condensation in the fuel. The output contactor switch will only remain in the ON position if the engine is not running. The moment the engine starts - it...
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