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2 brush generator

O

oregonfarmer

Member
The gen on our 200 stopped charging. This tractor is used daily so instead of spending time checking anything out we put a new regulator on and a rebuilt generator. The rebuilt gen was polarized before starting the engine. It still shows no charge on ampmeter. The gen that was used to replace the old 3 brush was a 2 brush. Is the 2 unit regulator not compatable with the 2 brush gen?
 
Farmer, you ask "..... The gen that was used to replace the old 3 brush was a 2 brush. Is the 2 unit regulator not compatable with the 2 brush gen.........?"

Is what you call a "2 unit regulator", a Voltage Regulator (3 or 4 terminals) orrrrrrrrr a two terminal (BAT and GEN) Cutout Relay?????????? Is your Light Switch a 4 position LHDB (indicates a Cutout Relay) or just an Off Dim Bright (indicates a Voltage regulator)????

If its a full fledged 3 or 4 terminal Voltage Regulator, it may well not work properly going from a 3 to a 2 brush genny.

If its a two terminal Cutout Relay it can still work with EITHER a 2 or 3 brush generator

Once you figure that out and if its wired correct my Troubleshooting Procedure linked below may help determine if the fault is the Regulator or the Genny.

See if it will charge if you take a jumper and dead ground the Gennys FLD post??? If so that tells you the genny itself is okay so the problem is an incorrect Voltage Regulator or a wiring problem.

John T
John Ts Troubleshooting
 
All the 4 & 560 IH tractors used a two brush generator and a two unit regulator. It was not until the 06 series like 706 that IH started to use the three unit regulator. I cannot come up with the parts diagram for your 200 but did find that a 350 12 volt listed a different regulator than a 560 does you you may have to do some cross checking. It still seems to me that when IH went to the two brush generator as a replacement on like a 450 gas tractor that we still used original regulators though. Like said, test by grounding fields and wiring before condemning regulator.
 
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