M6 Hobart Generator not charging

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pvtcook
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M6 Hobart Generator not charging

Post by pvtcook » Fri Aug 10, 2018 6:23 pm

Guys a bought a 1942 M6. It has the Hercules motor w a Hobart gen. It's been sitting for at least 40 yrs. I was able to get it running. Runs great but it's not putting out any voltage. I have no idea where to start. I did check the fuses lol. Someone mentioned flashing it since it's been sitting. But I have no idea how to even do that. Any ideas.
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45 Willys MB, MBT, Harley WLA


vj
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Re: M6 Hobart Generator not charging

Post by vj » Fri Aug 10, 2018 7:52 pm

WOW that a nice looking genset. :D
I have got four running halftracks,plus 5 ton ww2 semi-truck,1943 willys jeep and other ww2 vehicles,plus a lot of parts to trade on. Wendell in Tn.

pvtcook
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Re: M6 Hobart Generator not charging

Post by pvtcook » Fri Aug 10, 2018 7:57 pm

Thanks dad!
45 Willys MB, MBT, Harley WLA

Rakfine
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Re: M6 Hobart Generator not charging

Post by Rakfine » Sat Aug 11, 2018 4:39 pm

To flash the field you may rotate the voltage control knob to the minimum voltage output and then from a battery(automotive preferred) momentarily apply 6 or 12 volts to the two leads of the voltage potentiometer, if the field circuit is intact this should be enough juice to get a bump in the output voltage. I am not sure of the polarity but if the voltage bumps up and don't stay up then trying reversing the battery leads. If the voltage bumps in both cases but don't sustain output then the voltage control potentiometer may be defective. If you get no output bumps at all then it is probably an open circuit in the exciter section.
I am assuming this is not the 6 volt but the 120 volt AC section of the unit.

pvtcook
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Re: M6 Hobart Generator not charging

Post by pvtcook » Sat Aug 11, 2018 6:43 pm

Man I don't even know what the voltage potentiometer is lol. I do have both TM ordered for the unit. Do you flash it w the engine running? Yes it's the 120v side. 6v is charging good. Thanks for the input.
45 Willys MB, MBT, Harley WLA


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