BSA b31 E3HM Dynamo cap cover

[briancairns]

I am curious what the 'inspection hole' as outlined in image is for?

regards

Brian

[idie]

To lubricate the bearing

[briancairns]

Thanks yet again Idie!
What do I lubricate with and how much and often? I have cap of just to replace brushes.

Thanks in advance

Brian

[idie]

To be honest I wouldn't use oil. Just put some grease on your finger and push into the bearing. That will be probably the only time you would need to do it. If you use oil it tends to be thrown off and gets on the commutator, that is why the hole was deleted on later caps.

[briancairns]

Thanks for your advice Idie.

Cheers

Brian