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Tractor Talk Discussion Forum

Model M charging problems

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shneed

09-30-2006 15:54:11




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I did the testing tips I found on this site. The generator puts out 2 volts at high rpm. If I jump F to ground I read 10 volts. 15-20 amps on the tractor's meter. I also tried the polarizing of the generator and regulator. This did nothing. Is my regulator shot? Will it hurt if I leave jumper on generator? Any Help would be appreciated. Thanks




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Neil2

10-01-2006 18:58:43




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 Re: Model M charging problems in reply to shneed, 09-30-2006 15:54:11  
Thanks for the help guys. I tried what you said. I think I have the relay sysem you mentioned. I have no manuals for this tractor so I'm not sure. I removed black cover and found what to me looks like two relay contacts and coils. When I jump FLD to frame both contacts are closed. I wired in a switch from FLD to frame so I can turn charging off if I want.



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DLM

09-30-2006 21:09:24




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 Re: Model M charging problems in reply to shneed, 09-30-2006 15:54:11  
It should have a 3 brush gen. if so did you try to move the 3thd. brush so as to increase the output. Don



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John T

09-30-2006 16:52:56




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 Re: Model M charging problems in reply to shneed, 09-30-2006 15:54:11  
If she charges okay with the gennys Field post dead grounded but NOT otherwise and its a Voltage Regulator System, the problems either the VR is bad or badly misadjusted,,,,, ,,,,,or the VR isnt grounded well (usually to the gennys case),,,,, ,,,,or the wires bad from the gennys Field post to FLD on the VR.

If its a 2 wire Cutout Relay system (light switch controls gennys field current) ,,,,, then the problems either, the light switch is bad,,,,, ,,,,, or the light switch isnt well grounded,,,,, ,or the wires bad from the gennys field post up to the light switch.

If you leave the gennys Field post dead grounded and run for longgggg ggg periods, its possible you might eventually overcharge the battery or boil it over or cause excess outgassing etc. If the lights were on the chances are less of that happening. Worse comes to worse leave it grounded for a while (especially right after start up) n then remove it so you dont overcharge.

Best bet is to check the VR's ground and the connections n wire to the gennys field post and Fld on a VR or else the light switches ground and the wire from it to the gennys Fielde post if its the 2 wire cutout relay system.

Lemme know

John T

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