NO JD 520 should EVER get (or be) OLD..!! They are too nice to operate...if it IS "Old", it is time to make it "Young Again"...!!! You need to see an Electric wiring Diagram to actually see and correct the problem.. There is a Resistor behind the instrument (Dash) that is to Reduce Operating Voltage to the ignition points (While Running)..AND: A "Bypass" circuit that let's FULL Battery Voltage to the Ignition Points when then the Starter is engaged... That is where your problem lies.. For TEMP. (Emergency), you can run a Jumper from the Battery, to the Coil..to get it to run and move it for repairs..just be SURE to Remove the Jumper when you turn the engine OFF... Ron..
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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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