H Overcharging

Posted by MarkOhio on September 20, 2007 at 23:53:01 from (67.54.209.30):

My '49 H still has the 4 position light switch and 3 brush generator with the cut out relay. It charges just fine, actually too good. With the switch in the H (High charge position) it puts out about 10-11 amps which is just fine. However with the switch in the L (Low charge position) it still charges at the same rate. The switch is good as is the field resistor. With the switch in the H position I measure 0 ohms from the field wire to ground. With the switch in the L position I measure about 4 ohms to ground which I think is about correct, The field wire from the light switch to the generator field isn't shorted anywhere. Also with the lights on either in the dim or bright position the generator is putting out full charge as it should. Also, all grounds are good, light switch to box, box to steering post, steering post to frame, etc. so I feel that all wiring, resistor, and the light switch are in good condition. Could the field windings inside the generator be at fault and grounded to the generator frame? Would the generator still work as it does if that were the case? What I'm doing now is simply turning the lights on to reduce the amperage going into the battery when I feel that the battery is sufficently charged. So far no problems running it this way, the battery is going on 7 years now and still in good shape. I realise that this is a minor problem but would like to get it working as intended. If necessary I'll have the generator rebuilt. I'd rather keep the tractor original with just the cut out relay rather than convert it to a voltage regulator just to let my nephew and granddaughters know how it was done in the "old days". Oh yeah, even though it's a '49 model it still has the origional magneto and I'll keep it that way. The tractor was purchased new by my grandfather 3 months before I was born. Thanks in advance for your help.

Replies:

• Re: H Overcharging gene bender 10:55:59 09/21/07 (0)
• Re: H Overcharging Bob M 09:24:42 09/21/07 (0)
• Re: H Overcharging Pat-CT 07:39:02 09/21/07 (0)
• Re: H Overcharging John T 07:38:06 09/21/07 (0)
• Re: H Overcharging teddy52food 06:15:26 09/21/07 (0)
• Re: H Overcharging Owen Aaland 00:17:45 09/21/07 (0)
• Re: H Overcharging MarkOhio 00:02:05 09/21/07 (1)
  • Re: H Overcharging Bob M 04:21:18 09/21/07 (0)

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