Adjusting Voltage Regulator?

[EverettB]

[PEPPE]

i agree with busdaddy, but you can check also with a tester to see if , in that moment, the voltage of the generator is higher than the battery , (significating that the generator would charge).
let us know... on 6Vs i usually tweak the lenght of the belt a little, so that the generator spins a little more fast.

[lrestrepom]

Someone has the second page of overhauling bosh regulator???

[perello]

Another source of info...

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[RichOakley]

Reviving this thread again.

The electrical/charging system is working fine on my car when revving, but at idle, the voltage output from the regulator is 5.90-6.00v. At the fusebox, I'm getting 5.80-5.90v at idle, not quite enough to power everything happily.

Can I adjust something in the regulator to increase the voltage just at idle?

Thanks,
Rich.
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[sgellis]

[telford dorr]

One thing I have found messing with regulators is to make sure all of the mechanical clearances are per book spec (see post above). If they're off, the unit will not operate correctly. So check them after any filing or sanding of the contact points. All other operational adjustments are made by adjusting the spring tension as shown above.

The ideal high speed charge voltage is around 7.2 volts for 6 volt systems and 14.4 for 12 volt systems. This voltage varies a little with temperature. You can find charts online which show the exact values.

If the voltage at the "Df" terminal on the regulator is at 0 at idle, then the regulator is commanding the generator to produce maximum output. If it isn't enough, then the only solution is to either spin it faster, or change out the generator for one which produces a higher output.
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'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
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[52brezelfenster]

Everett, I'm trying to bring my idle output voltage up a tad.

The picture you posted below where you tweaked post (D) up... did that seem to work well on your car to accomplish this?

Thank you,
Dustin

[telford dorr]

Bending that regulator adjustment adjusts high speed output voltage. Idle output is controlled by generator speed and generator design.
_________________
'71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST)

[EverettB]

Yes, it did raise the voltage and the light is off most of the time but not completely - Sometimes the light still blinks on if the idle randomly drops a little.

So I guess it didn't totally work for me.

It's possible based on what Telford said that I have the idle high enough so that it's in non-idle mode?

This is on my Double Cab and I think it has dirty connections elsewhere that could be cleaned up - that might help too. I have never cleaned up the speedometer posts or connections but I have cleaned the fuse box.
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[52brezelfenster]

Thanks fellas for the info. Time to get my voltage meter out for a little tweaking.

Dustin

[carlk3]

[telford dorr]

The generator must be able to produce excess voltage before the regulator has any control. To find out, measure the voltage at Df. If it's zero, then the regulator is already commanding the generator to produce maximum output, and it's up to the generator to get that done (by spinning faster).
_________________
'71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST)

[carlk3]

[telford dorr]

Looks right.

[BarryL]

[carlk3]

[carlk3]

[busdaddy]

[carlk3]