The generator is likely a Delco A circuit generator. The simple test is to start the tractor and use a jumper wire to ground the F terminal on the generator. this causes it to put out full power, which is OK for a modest time like a minute or so. The amp meter should show a nice charge rate. If it does, I would replace the regulator. Find a good USA made Delco regulator, not cheap import. If it does not charge, it could be the generator or the cutout relay in the VR. Use the link to get more serious. Jim VR The VR relay (of the two in the housing) is normally directly grounded through closed points. There may be 2 sets of contacts on that relay, but the one that stays closed when the engine is off (the upper one), is the active set. Thus when the VR is grounded to the tractor engine (it must be for it to work, check for a perfect ground to the regulator frame) the contacts ground the field circuit. When the voltage is higher than intended (by the settings of the gaps and spring tension) the contacts open and let the ground circuit flow through a resistor to lower the charge voltage. The process is random and pulsed DC control. Very electronically noisy. But the average current causes the average voltage to be correctish. If yours works when the field is jumped to ground, your regulator is not putting the connection through the points to ground (as it should). It is not likely the points, it is likely the regulator ground. Jim • Read up here http://www.navioneer.org/riprelay/The%20Navion%20Files/Delco_Remy_Generator_Regulators.pdf
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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