Repairing an IGH, a 3 speed SRAM T3
Danny1962
Posts: 58
Mission accomplished. It’s done, and it all works. Getting only the parts I needed has saved me about €75 compared to getting an entire new set of innards and it’s been a valuable learning experience and a confidence booster too.
I was having ever more difficulty getting the bike into 1st, and eventually it wouldn’t go in at all. On taking it apart it was obvious my Driver-Head had failed – the ball bearing housing had disintegrated and one of the compression springs was badly out of shape. I don’t know why it failed.
Well I bought the parts I needed from hollandbikeshop.com and spent this morning rebuilding it. It’s all back together again now – I’d never dismantled or reassembled an IGH before so wasn’t really sure what to expect. I just had to trust the diagrams in the dealer manual. I worked slowly and steadily, being sure to identify the parts and cross referencing them to the SRAM dealer manual
http://www.sram.com/_media/pdf/sram/dea ... S_E_99.pdf
Because I couldn’t see it working before it got hidden away within the shell it is still something of a mystery how it all works. It’s clear that different positions will cause different sets of cogs to engage, but I can’t claim to know any more than that. However I certainly know more about it than I did before.
If I ever see a 3 speed IGH bike going cheap locally because the gears need attention, I’d certainly consider buying it and fixing it up. That’s something I wouldn’t have even considered doing before my T3 adventure.
Photos are here, including the parts laid out
https://picasaweb.google.com/1100556695 ... HubRepair#
I was having ever more difficulty getting the bike into 1st, and eventually it wouldn’t go in at all. On taking it apart it was obvious my Driver-Head had failed – the ball bearing housing had disintegrated and one of the compression springs was badly out of shape. I don’t know why it failed.
Well I bought the parts I needed from hollandbikeshop.com and spent this morning rebuilding it. It’s all back together again now – I’d never dismantled or reassembled an IGH before so wasn’t really sure what to expect. I just had to trust the diagrams in the dealer manual. I worked slowly and steadily, being sure to identify the parts and cross referencing them to the SRAM dealer manual
http://www.sram.com/_media/pdf/sram/dea ... S_E_99.pdf
Because I couldn’t see it working before it got hidden away within the shell it is still something of a mystery how it all works. It’s clear that different positions will cause different sets of cogs to engage, but I can’t claim to know any more than that. However I certainly know more about it than I did before.
If I ever see a 3 speed IGH bike going cheap locally because the gears need attention, I’d certainly consider buying it and fixing it up. That’s something I wouldn’t have even considered doing before my T3 adventure.
Photos are here, including the parts laid out
https://picasaweb.google.com/1100556695 ... HubRepair#
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