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https://www.steelsoldiers.com/showthread.php?100162-TM-MEP-531A-MEP-501A-2Kw-Gen&highlight=531A and more here.. https://greenmountaingenerators.com/manuals-and-support/mep531a-manuals/

You will want to refer to TM 9-6115-643-24 for troubleshooting and wiring diagrams. If you are measuring only 11 volts on S1-7 when it's in the START position then there is certainly a problem. Ought to be ~ 24 volts DC then...

You'll need to loosen the large hex nut on the back side of the lamp assembly first. Then unscrew the shade.

Pushing the GFCI Test button will only drop the load to, if any, that's plugged into the convenience outlet. The main contactor powering the output lugs will remain closed (if previously closed).

GMG parts are way over priced in most cases. The one they offer for $298 is the blue plastic version that is prone to breaking. It's the Kraus & Naimer CHR10-C57400. I'd recommend getting a 75902LV from Electroswitch. Last I knew you could order one from them for $97.45 + shipping. It's build...

Yes, there is a High Temperature switch in the engine that will shut it down as long as Battle Short is OFF. The Coolant Temp gauge circuit is independent from the High Temp switch circuit.

All faults except a Short Circuit fault. A tip provided by the all mighty MEP Guru Guyfeng.. How to start with Battle Short "ON". AKA How to start with fault(s) that prevent it from starting and running normally. Hold the fault indicator reset in, and hold it in, then turn S1 to the start...

Some here -> https://www.graywacke.net/products/interconnect-products

Yes - you can leave the batteries connected when you use two 12V battery chargers. Be sure the chargers power plugs only have 2 prongs and not 3 and you'll be fine. That's how I maintain the batteries in my 802. The two batteries are on separate 12V Battery Tenders 24/7. I've used four 12 V...

For my 802A I spent about $300. S1 plastic shaft was busted. Got a new 75902LV S1 off ebay for around $40. New fuel & oil filters. $40 Petcock was torn off radiator. Simple soldering fix. $0 Leaky IP return lines. $1 worth of fuel line and a couple of clamps. $3 Two new group 51 batteries...

Yes, P7/J7 has to be relocated. Did it to my 831 with the 4K head installed. The contactor has to be relocated too. I'll let that cat out of the bag for those that may be interested in converting their 831A to a "standard" generator head such as the Northstar 4000 watt head. I'm developing a...

Some TM's for the 803 you ought to download so you have them on hand when needed. TM 9-6115-642-10 is the Operators Manual TM 9-6115-642-24 is the Maintenance and Troubleshooting manual for maintaining the set and diagnosing issues. Also has wiring diagrams. TM 9-6115-642-24P is the Parts...

Fuse Mod and many other genset updates are covered in this TB -> https://www.steelsoldiers.com/showthread.php?122965-FIELD-AND-SUSTAINMENT-and-MAINTENANCE-2k-THRU-200k-TQG-GENERATOR-SETS

You should see about 100 psi at startup. Will drop to about 85 PSI when warmed up. 15 is way too low. Have you followed the TM's No Crank procedure? It walks thru testing each of the items in the crank circuit.

Did that fix the short to ground or is it still shorted?

I spent some time yesterday looking for you. Couldn't find any..

Update.... I received a charger from a S.S. member so that I could complete the reverse engineering. Done. :grin: Prototype charger using the same parts and circuit as the original works as expected. Printed Circuit Boards designed and being fabricated now. My plan is to be able to offer...

Are you following the procedure on the data plate above the pull start cord when doing a manual start? After doing the pull start you need to also momentarily toggle S1 to Start position to clear the OP fault. For the "no crank" problem there is a section in the -13 TM to troubleshoot that.

I made that mistake back in May. Set is on casters and it quickly rolled into my ankle. 2 months later the pain and swelling has just subsided.

I just received a dozen more of them to give to S.S. members. If you need one I'll drop one in the mail to you. Just shoot me a PM with your mailing address. No charge.