The issue is complex but very fixable. There is a direct conflict between two control systems. The tractor charging system was first designed with a operator controlled charge rate consisting of the light switch as a controller. (The lights were not part of this control, just hooked to the same switch shaft) The L low and H high positions, as well as D and B positions, affect the generator output by grounding the field terminal of the gen. (It gets its voltage from the third brush, or the Arm terminal in a two brush) the L position runs the field current through a wire resistor on light switch. In all other switch positions the grounding is direct, allowing full field and max charge. Your tractor now has a voltage regulator on it. This is in direct conflict with the switch for control of output. If originality is desired, and the switch is used, the VR must be removed and the F wire must go to the light switch. (the resistor on the light switch must be good as well, there are two resistors one for dim lights and one for low charge) Better regulation, and battery life can be had with the VR, and then the wire from the light switch must be disconnected. (both ends) This allows the gen to be regulated correctly by the VR. (assumes a good Grounded VR) I would do this and abandon the switch. Jim
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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