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For Question#1 - others have pondered this very question:https://www.accessnorton.com/NortonCommando/how-to-make-the-atlas-dominator-primary-oil-tight.26860/As you'll see in the pics, the hole in the actual primary inner case is oblong. There is a second part to it, which is two thin peices of sheet metal sandwiching the inner case and tacked together at the centre around the hole where the shaft comes through. This allows the piece that the actual shaft goes through to move forward and aft depending on the adjustment, while still providing some "splash" protection from outside and in.Some good pics and explanation on another forum:https://www.britbike.com/forums/ubbthreads.php/ubb/printthread/Board/3/main/91195/type/threadAs for Question #2, the second link shows a parts diagram for an older dynamo model chain case, but I don't believe they changed the location of the felt washer (Part #8) on later alternator models. That diagram shows an intresting "eyebrow" type overhang to keep oil away from the mainshaft hole that they abandoned on later models. (below for reference, and because posts with pictures are always more fun) [ATTACH=full]113856[/ATTACH]
For Question#1 - others have pondered this very question:
https://www.accessnorton.com/NortonCommando/how-to-make-the-atlas-dominator-primary-oil-tight.26860/
As you'll see in the pics, the hole in the actual primary inner case is oblong. There is a second part to it, which is two thin peices of sheet metal sandwiching the inner case and tacked together at the centre around the hole where the shaft comes through. This allows the piece that the actual shaft goes through to move forward and aft depending on the adjustment, while still providing some "splash" protection from outside and in.
Some good pics and explanation on another forum:
https://www.britbike.com/forums/ubbthreads.php/ubb/printthread/Board/3/main/91195/type/thread
As for Question #2, the second link shows a parts diagram for an older dynamo model chain case, but I don't believe they changed the location of the felt washer (Part #8) on later alternator models. That diagram shows an intresting "eyebrow" type overhang to keep oil away from the mainshaft hole that they abandoned on later models. (below for reference, and because posts with pictures are always more fun) [ATTACH=full]113856[/ATTACH]
