 Dan.. please define this 'odd logic' that you speak so lowly of. include all technical refs and theory to 100% support your reply. The usualy reason we suggest to repolarize a system is to make sure the pole pieces have a residual charge.. For day to day, and month to month.. heck.. even year to year use.. they should retain residual magnetism. however, if a unit is disassembled, or repaired with new parts.. there might not be any residual magnetism. Same with changing polarities. next reason is to set the cutout on the vr. Again.. same reasons apply.. if it is a new vr, or if it is a polarity swap. i don't think I have ever seen anyone advocating repolarizing a genny/reg just because a cutout relay opens the circuit after the engine stops. If you have.. please post a link to the message... I have 5 tractors that needed genny / vr repolerization when i got them due to no charge. On my 66 IH cub,oem 12v, the vr was new, and just bolted on by the prev owner when he sold the tractor, and the tractor didn't charge. Old genny, new vr.. etc.. I polarized it, and it charged. On my 50 JD B, the oem genny and vr were disconnected and a 12v battery was setting int he bat box. owner had used it like that for 12 years as it had a magneto, and he just charged the battery now and then. I hooked the vr and genny back up to a 6v battery... no charge... i repolarized.. and now it works every time. My ford 660 had the oem genny and oem or at lest vintage vr. Someone had obviously taken the genny and vr and sheet metal off to replace the gas tank. i also noticed new bat, and new bat cables and terminal clamps. Unit did not charge.. but it did after repolerizing it. On my 8n, the owner had the genny rebuilt, and the rebuild shop sold him an incorrect vr.. it did not charge.. but he hooke dit all up anyway.. and dropped an 8v battery in. I replaced the 8v batttery with a 6v unit., got a new vr, and then had to repolarize to get charge. VR was new, and genny had new guts. On my 5000, it did not charge. OEM 12v lucas genny, and oem lucas VR. Genny had dirty contacts. I cleaned them. Still no charge.. I repolarized the system... now it charges. Later a friend sent me a new repop vr for a 12v diesel hundred series ford to replace the flaky lucas vr with the bad contacts. I installed it, and it did not charge.. I of course had to polarize it, then it charged fine. Hard to argue with emperical data. Fact is.. none of my units that needed repolerization were magically going to start charging by themselves., until they were correctly polerized. I have included a link to some vintage literature. It came out of the manual for some heavy equipment we have... Interestingly enough.. it explains how to replace a regulator, and repolerize. Now.. why would those instructions have been included in the manual if there was never a need to repolerize anything? Soundguy
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