Sachs/ SRAM bike gear hub is stuck
I've just moved to Germany to start college and I bought a used bike really really cheap. I obviously knew it had this problem with the gear drum, but I figured fixing it would be a fun little side project.
So here's the deal: We are talking about a Sachs Pentasport Torpedo 5 gear hub. Released sometime in the late 80's. The hub has two little chains on each side that are supposed to pull something to change the gear when the lever is used, but they won't budge at all when I attempt to change the gear. I can see the cables gaining tension however.
Any advice is more than welcome. If you need more details or even photos I'll gladly provide them.
Alright, so I took the thing apart today since it's been raining here in Hamburg. It seemed very well greased, but even so I sprayed some WD40 and clean up the old grease, then reapplied. Nothing changed other than the fact that now 2 of the 5 gears work sporadically (the highest and the lowest). By that I mean that changing from 1st gear to 5th works, but only whole minutes later and after I drive trough some uneven terrain. Anything in between, like 2nd, 3rd and 4th gears don't trigger the mechanism.
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