On my last flight (before the schedule of planned remedial work I've been working to) I noticed the Low Volts warning light staying on in the climb.
I tightened the generator belt and then ran on the ground, the low volts light flickered (rapidly) on/off above 1100
I did the recommended generator troubleshooting I found on line and the generator was producing no output and in the course of this, I found the field tab connector was hanging on by a thread, so replaced the connector
I cleaned the "points" in the Delco Remy Voltage Regulator with fine abrasive paper and then the low volts light remained solidly on above 1100 rpm
The generator was then overhauled and reported as working fine on the bench.
I refitted the generator and found the same problem with the low volts light staying on above 1100 rpm
With master switch on I can measure battery voltage (to ground) to as far forward as the voltage regulator, but obviously not at the generator
Due to the maintenance work and therefore being in the hangar, I haven't run the engine since the test above, but intend to do that this week and measure battery voltage from the ammeter to ground and see if the voltage does increase at rpm above 1100 and therefore point to a faulty low volts light, but other than that I'm thinking voltage regulator, maybe something to do with the field circuit, the thing about "flashing/polarising" the generator (although the generator shop said it wouldn't need this), or WHO KNOWS?!!!!!
I'd really appreciate any thoughts/steers/troubleshooting steps on this please
Thanks
Philly
I tightened the generator belt and then ran on the ground, the low volts light flickered (rapidly) on/off above 1100
I did the recommended generator troubleshooting I found on line and the generator was producing no output and in the course of this, I found the field tab connector was hanging on by a thread, so replaced the connector
I cleaned the "points" in the Delco Remy Voltage Regulator with fine abrasive paper and then the low volts light remained solidly on above 1100 rpm
The generator was then overhauled and reported as working fine on the bench.
I refitted the generator and found the same problem with the low volts light staying on above 1100 rpm
With master switch on I can measure battery voltage (to ground) to as far forward as the voltage regulator, but obviously not at the generator
Due to the maintenance work and therefore being in the hangar, I haven't run the engine since the test above, but intend to do that this week and measure battery voltage from the ammeter to ground and see if the voltage does increase at rpm above 1100 and therefore point to a faulty low volts light, but other than that I'm thinking voltage regulator, maybe something to do with the field circuit, the thing about "flashing/polarising" the generator (although the generator shop said it wouldn't need this), or WHO KNOWS?!!!!!
I'd really appreciate any thoughts/steers/troubleshooting steps on this please
Thanks
Philly
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