astrocan
Veteran
- Location
- Abingdon, Oxon
I am fitting a pair of non-index friction shifters to Mrs As bike but can't get them to hold the friction adjustment.
I think I understand the principle, tightening a screw increases the pressure on an interal dished washer so that the amount of force can be adjusted so that it can be stiff enough to resist the derailleur spring but loose enough to allow for easy shifting.
I haven't cabled it up yet but every time I move either lever in an anti-clockwise direction the tensioning screw moves with it and the setting is lost.
I have lubricated the dished washer, I have added a slim washer between the tensioning screw and lever I have even cleaned out the threads and used threadlock but all to no avail.
I can't think what I am doing wrong, I don't think anything is missing but my sanity may be soon.
Any advice or experience welcomed.
I think I understand the principle, tightening a screw increases the pressure on an interal dished washer so that the amount of force can be adjusted so that it can be stiff enough to resist the derailleur spring but loose enough to allow for easy shifting.
I haven't cabled it up yet but every time I move either lever in an anti-clockwise direction the tensioning screw moves with it and the setting is lost.
I have lubricated the dished washer, I have added a slim washer between the tensioning screw and lever I have even cleaned out the threads and used threadlock but all to no avail.
I can't think what I am doing wrong, I don't think anything is missing but my sanity may be soon.
Any advice or experience welcomed.