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Dec 03, 2017 1:14 pm
Dec 03, 2017 1:14 pm
Subject: Re: Dynamo removal
As Colin states, a good dismantle and clean should be your first move. In particular, make sure the commutator is shiny bright copper where the brushes bear. Degrease if necessary first, then remove tarnish with an ink rubber, or if stubborn, some fine emery paper...blow or vacuum any dust away. Check for worn brushes, or brushes sticking in their holders. Take care to ensure (if there is a possibility of alternative fitment) that brushes are fitted in their original positions. Attention to these areas will resolve 90% of charging issues with the dynamo itself. Poor output could of course result from poor connections in your wiring, or of course, the voltage regulator itself. To edit folllowing Colin's correction below...wasn't sure when voltage regulators started to be fitted! At least the 3-brush arrangement has the virtue of simplicity, and reduces the number of items to check when faults occur.
Laurence
As Colin states, a good dismantle and clean should be your first move. In particular, make sure the commutator is shiny bright copper where the brushes bear. Degrease if necessary first, then remove tarnish with an ink rubber, or if stubborn, some fine emery paper...blow or vacuum any dust away. Check for worn brushes, or brushes sticking in their holders. Take care to ensure (if there is a possibility of alternative fitment) that brushes are fitted in their original positions. Attention to these areas will resolve 90% of charging issues with the dynamo itself. Poor output could of course result from poor connections in your wiring, or of course, the voltage regulator itself. To edit folllowing Colin's correction below...wasn't sure when voltage regulators started to be fitted! At least the 3-brush arrangement has the virtue of simplicity, and reduces the number of items to check when faults occur.
Laurence