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More info...Overrcharging 6V 8n?

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Ol' Poke

08-07-2005 16:38:43

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Here are my ammeter readings:
Not running: 0 amps Key on: -6 amps Lights on: -18 amps
Running: 800 RPM: +10 amps Lights on: 0 amps 1200 RPM: +30 amps Lights on: +20 amps

All battery cells are full. I will have to wait until tomorrow for voltmeter readings.

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Rob

08-07-2005 17:23:23

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Re: More info...Overrcharging 6V 8n? in reply to Ol' Poke, 08-07-2005 16:38:43

Your lights sound about right. The other amps are not.
Max amps is 20 @ 1650rpm volts 7.0.
Regulator:
Cutout closing voltage 6.0-6.6
voltage limiter 7.1-7.5

I"ve used the instructions in the FO-4 para 66-67 to set up the voltage regulator but a guy might just haul the genny and voltage regulator into the generator/starter/alternator shop and they will set them up. It"s not that tricky to set them up. Let me know if you want the instructions. It takes some typing so I"m not going to do it unless you will use them.

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Ol' Poke

08-07-2005 17:48:22

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Re: More info...Overrcharging 6V 8n? in reply to Rob, 08-07-2005 17:23:23

Hello Rob, would it be too much to ask? I don't have ready access to such a shop, and always like doing things myself. Although that's gotten me into trouble as well ;-) Please send along the instructions.

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Rob

08-07-2005 19:25:18

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Re: More info...Overrcharging 6V 8n? in reply to Ol' Poke, 08-07-2005 17:48:22

Ok, first thing is to pull the voltage regulator (VR), wires attached. out the battery door and set it on the hood where you can get at it. Now pull the cover off the VR and ID the normally open (NO) contacts and the normally closed (NC) contacts. Drag a dollar bill through the points to clean them up good, you will have to hold one set closed. Connect/jumper the base of the VR to ground. Good grounds are good things. Maybe you can make the adjustments leaving the VR bolted to the back of the dash but I didn"t even try.
Connect the voltmeter between the GEN terminal and ground. Slowly increase the generator speed and the NO contacts (cutout relay) should close between 6.0-6.6 volts. You adjust that voltage by changing the spring tension on the relay armature (the part that moves). Opening voltage should be, near as I can tell, 0.5-1.5 volts less then the closing voltage or 6amps max reverse current @ 6.0 volts minimum. You adjust that by changing the air gap between the stationary contact point (bend that) and the movable armature contact point.
Connect the voltmeter between the BAT terminal and the regulator base (it is grounded, right?) and you want 7.1 to 7.5 volts with the genny at operating temp and putting out 5amps. Max amps is 20 @ 1650rpm and voltage should not exceed 6.8. Adjust by increasing or decreasing the armature spring tension.
It seems some confusing and it takes itty bitty adjustments on the spring tension and you might over shoot a couple times but once you get your bearings and the hang of it, it is pretty straight forward.

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