03-01-2020, 11:09 PM
The Third Brush is carried on the adjustable aluminium ring on the end of the dynamo, indicated by the blue arrow.
mag dynamo.jpg (Size: 90.06 KB / Downloads: 253)
Undo the screw and nut indicated by the pink arrow and turn the brush holder clockwise or anticlockwise to adjust the charging rate. You should use an accurate ammeter for this but the panel one will do if you don't gave access to an Avo or DMM. I set mine to 6A, I've had trouble with mag dynamos when turned up to 8A and they're very expensive nowadays!
BTW, the aluminium castings at the end, shown in the photo are very fragile; I had one dynamo years ago where the armature went short circuit at 50mph! The armature was forced out of the dynamo, through the castings, which were ruined. I had to drive back from the Brecon area to Wiltshire with a plastic bag stuck over the hole where I had taken the dynamo out. Advantages of Mag engines!
What's the big jubilee clip for??
mag dynamo.jpg (Size: 90.06 KB / Downloads: 253)
Undo the screw and nut indicated by the pink arrow and turn the brush holder clockwise or anticlockwise to adjust the charging rate. You should use an accurate ammeter for this but the panel one will do if you don't gave access to an Avo or DMM. I set mine to 6A, I've had trouble with mag dynamos when turned up to 8A and they're very expensive nowadays!
BTW, the aluminium castings at the end, shown in the photo are very fragile; I had one dynamo years ago where the armature went short circuit at 50mph! The armature was forced out of the dynamo, through the castings, which were ruined. I had to drive back from the Brecon area to Wiltshire with a plastic bag stuck over the hole where I had taken the dynamo out. Advantages of Mag engines!
What's the big jubilee clip for??