Dynamo

[john williams]

Thanks Dave for your comprehensive reply.
Brush gear is the newer type with “snail springs”
Checked carefully for any shorts.
As mentioned previously the Dynamo motors very well.
The only thing I can think of is the field connection.
This was mentioned by Bob from NZ
So I will try that.
Report back later
Regards
           Tim

If the dynamo "motors", it is usually sound. Refit the dynamo to the engine, leave the "D and "F" leads disconnected. Conenct a link lead between "D" and "F" terminals on the dynamo, run the engine with anologue voltmeter connected between "D" terminal and a good earth. If votmater reads approx' 7.5 volts, it is fine, fault is in associated charging circuit.