On 4/22/10, Lee&John Howard <leejohn7@gmail.com> wrote:
> Would someone be so kind as to describe a simple voltage test that I can
> conduct at the generator, so I can be certain I have that right?
Possibly this will help (from a long-ago post, imagine an organ riff
as used to tell radio listeners that a flashback is coming)...
1. Verify that the battery is in good condition.
2. Verify belt tension is okay.
3. Test the Armature -- Disconnect dynamo leads and check voltage at
the D terminal (the big one) at 1500 RPM should be 1.5 - 3.0 V.
4. Test the Field -- Leave voltmeter as above and connect ammeter
between D terminal and F terminal (the little one). Increase engine
speed until voltage is about 12V, ammeter should read about 2 amps.
Haynes offers a variation on the above -- you disconnect the leads and
connect a jumper wire between D & F. At idle the dynamo should then put
out about 15V. They indicate that a reading of 0 suggests the brushes
are faulty, about 1V suggests the field is faulty, 4 to 6V suggests the
armature is faulty.
Geo
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