Afternoon all,
Before commencing major surgery I thought I'd check if anyone has come across this problem before.
I have a made up dynamo which came on my bike when I bought it, it has a lucas shell grafted onto a Miller drive end. Thus gives you the slightly higher output.
I've just got it back from being rebuilt totally (I burnt it out) so it has a new armature shaft.
When I fit it all back together I can only get the nut half on the end threads.
The PD16 sprocket carrier is tight on the end of the armature shaft - so tight that my sprocket puller wont budge it back off. However there appears a bit of space behind it, between the PD16 and the bearing housing on the dynamo end. It looks to me as if the PD16 and the armature shaft are not compatible and the PD16 needs to move up the shaft a little to enable me to get three more threads on the end and secure the nut.
Comparing the distance from the dynamo bearing plate to the end of the threads on this dynamo and a spare that I have they are about the same - so it is unlikely that the problem is a short armature shaft.
(I know about the tab washer and drilling and wirelocking the nut too).
Has anyone come across this problem before and have any suggestions for me before I start surgery - I'm thinking that the PD16 needs to be eased to allow it to locate further up the armature shaft to give me the clearance I need. Looking at it, this will bring the sprocket central on the chain run and so position it properly too.
Any thoughts or advice gratefully received.
Many thanks
Regards
Stuart
PS The PD16 is the actual one I used on a spare Miller Dynamo that I borrowed and have been running with in the interim - it went on properly to the right place and I got the nut fully on as expected. So that might sugegst the PD16 is OK.
Before commencing major surgery I thought I'd check if anyone has come across this problem before.
I have a made up dynamo which came on my bike when I bought it, it has a lucas shell grafted onto a Miller drive end. Thus gives you the slightly higher output.
I've just got it back from being rebuilt totally (I burnt it out) so it has a new armature shaft.
When I fit it all back together I can only get the nut half on the end threads.
The PD16 sprocket carrier is tight on the end of the armature shaft - so tight that my sprocket puller wont budge it back off. However there appears a bit of space behind it, between the PD16 and the bearing housing on the dynamo end. It looks to me as if the PD16 and the armature shaft are not compatible and the PD16 needs to move up the shaft a little to enable me to get three more threads on the end and secure the nut.
Comparing the distance from the dynamo bearing plate to the end of the threads on this dynamo and a spare that I have they are about the same - so it is unlikely that the problem is a short armature shaft.
(I know about the tab washer and drilling and wirelocking the nut too).
Has anyone come across this problem before and have any suggestions for me before I start surgery - I'm thinking that the PD16 needs to be eased to allow it to locate further up the armature shaft to give me the clearance I need. Looking at it, this will bring the sprocket central on the chain run and so position it properly too.
Any thoughts or advice gratefully received.
Many thanks
Regards
Stuart
PS The PD16 is the actual one I used on a spare Miller Dynamo that I borrowed and have been running with in the interim - it went on properly to the right place and I got the nut fully on as expected. So that might sugegst the PD16 is OK.