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6 volt generator

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1chano

02-25-2006 11:18:31

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Changing 2n tractor back to 6 volt, it used to have a 8 volt battery. I changed the resistor back to old style block made for 2N. Started tractor and was checking voltage with a volt meter. It shows voltage at cutoff b side but not on gen side.Put throttle a half speed and checked again on gen side but still nothing. Since this is a new 60$ workaholic battery I don't want to ruin it, the generator gets real hot.I tried checking the archives before posting but they don't seem to be there?? Main wory is why the generator is so hot.

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Jack-Illinois

02-25-2006 14:46:51

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Re: 6 volt generator in reply to 1chano, 02-25-2006 11:18:31

Sounds like the wire between the generator armature and the cut out relay could be shorted to ground. Take it loose from the generator and run the tractor and see if the generator still gets hot. If generator still gets hot have it checked - if not look for a short along the wire. Or someone else may come up with another idea.

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Dan Hill

02-26-2006 04:16:47

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Re: 6 volt generator in reply to Jack-Illinois, 02-25-2006 14:46:51

Shorting to ground will not bother a 3 brush generator.You will find that tractors with magneto ignitions have instructions on shorting generator armatures if the tractor is run with out a battery.My Jd H manual says to do this or remove the generator drive belt.NEVER run a 3 brush generator disconnected from its load.These generators can get up to 40 volts if run open circuit.

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1chano

02-25-2006 19:48:22

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Re: 6 volt generator in reply to Jack-Illinois, 02-25-2006 14:46:51

Jack thanks for the info. could of been shorting since output wire was not connected to output bolt. Redid the wire to the bolt and now i'm getting voltage 7.1 at one end of cutout and 6.5 at other end which goes to he battery and Genny is not getting as hot as before. Ampmeter now reads close to 10amps.Hope this solves this problem thanks for the help, if anyone has any additional things I should look out for let me know. Don't want to ruin any of my investments ( battey,resistor block ect..)

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Dan hill

02-26-2006 04:34:08

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Re: 6 volt generator in reply to 1chano, 02-25-2006 19:48:22

10 amps is full output for these old generators.Output is controlled by moving the third brush.You should read the same voltage on both terminals of the cutout.Sounds like the cutout points are open and you are reading a discharge on the ammeter.You should have a positive ground on the battery and the ammeter pointer should swing to the right of zero on the meter.

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Dan Hill

02-25-2006 12:19:16

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Re: 6 volt generator in reply to 1chano, 02-25-2006 11:18:31

Take the cover off the cutout and see if the points are closing when the engine is running.The spring tension may have been increased so the cut out would open on 8 volts.There is a fine wire coil under the heavy coil.The fine wire coil is there to close the points when the generator start producing power.This coil may have burned or opened when 8 or 9 volts was used on it.Close the points by hand and see if the ammeter indicates a charge.

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Dan Hill

02-26-2006 04:02:51

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Re: 6 volt generator in reply to Dan Hill , 02-25-2006 12:19:16

Look at the armature wires for burn marks and melted solder.3 brush generators will burn their insulation if run with no load.You should have this looked at in an auto electric shop.The field coils may be burned also.The armature should be checked for shorted turns on a growler.Problems like this are the #1 reason why you should have a generator checked out on old tractors before running them.Most need new brushes any way and the disconnected wire could have been repaired.

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1chano

02-26-2006 10:40:04

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Re: 6 volt generator in reply to Dan Hill, 02-26-2006 04:02:51

Dan
The Ammeter is the loop type, 10amps to the + side,the cutout on gen side shows 7.1 volts and the other side to battery showed 6.5 at the time I was checking it, haven't run it long enough to see if battery side will in crease to 7.1, i'm using a small gas tank off an edger to test before putting on hood. On payday i'll purchase a new cutout, and if need be a generator. Thanks for all the info. Here's a picture of my temp gas setup.

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dan hill

02-26-2006 15:48:10

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Re: 6 volt generator in reply to 1chano, 02-26-2006 10:40:04

Nice job.good to see some nice work on a tractor for a change.

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1chano

02-25-2006 13:31:31

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Re: 6 volt generator in reply to Dan Hill , 02-25-2006 12:19:16

Thanks Dan Hill
The cutout cover seems to have been welded, They might have done what you said, I didn't know that they did that kind of stuff. I just walked in from the pole barn, took my generator off and took it apart It smeels burnt? then i found that the reason that no voltage at gen was becaause that wire on the pic was not connected to anything, I figure it should of been on the one screw that sends the current out.I'll check out the manual. But what you said about the cutout might still apply since the welded cover cap. Thanks again.

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