Posted by John T on October 29, 2007 at 15:17:53 from (66.244.83.147):
In Reply to: Farmall C generator posted by TxFarmall on October 29, 2007 at 13:44:38:
Tx, As usual Jim and I are pretty much in agreement, but I will toss out a few other tid bits which may or may not help at all lol.
On some of the Delco systems that used a 3 brush genny, those 2 coil/relay VR"s second (NOT the Cutout Relay) coil/relay was a combination Voltage and Current VR butttttttt when they went to the 2 brush genny the 2 coil/relay used on them (although it looks the same) had a cutout plus a Voltage Control only coil relay. What Im trying to say is (and I do believe one can convert your genny to a 2 wire by the simple wire change and brush elimination as you guys figured) is that while it may indeed work it may not be as good as if that conversion had the VR that Delco used on the early 2 brush gennys. Heck try it n see if you let the smoke out lol but if it makes her charge at high rate right after a start up but then backs down once the battery is well charged its likely fine. However, if it stays at high max charge all the time or dont ever charge enough then it needs attention (maybe the corect VR)
On many 4 terminal VR"s the 3 terminals side by side are BAT FLD LOAD while the ARM/GEN is off on one side or the bottom by itself.
If I had a 4 terminal VR anyway Id opt to go ahead n use the L terrminal to feed hot batetry voltage to loads (lights n ignition) instead of feeding them off the ammeter. Its a lil better system that way if so equipped
PS come to think of it, if you have a 4 terminal VR it may already be the one designed for a 2 brush genny n will do fine if you convert the genny. I believe Id try that SECOND but FIRST see if it will work with the 3rd brush if its not set too close???????? cuz delco did indeed use 3 brush gennys with 2 coil/relay VR"s right after the early cutout only relay systems. Im just unsure if the early ones were 3 or 4 terminal??????
Ive read there ought to be from 1 to 2 bar spaces left between the third and fixed brush versus as close as possible butttttt I dont have any real delco specs n data to back that up.....
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