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How do I reassemble the Shimano SL-RS47-7 SIS left shifter on the handlebar after it became separated after an accident? The shifter became separated and I could only get it into first gear. It does move the derailer but it doesn't have any stops, therefore, springs back to first.

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    Without any indication at all about what the damage is, I don't see how anyone can answer your question. can you include detailed photographs of the damaged shifter? – David Richerby Jul 4 at 17:18
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    Generally, the repair method for a broken/failed Shimano shifter is "buy another one". – Andrew Henle Jul 4 at 17:31
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    There are several completely different versions of Shimano SIS shifters. At the very least a picture is needed. – Daniel R Hicks Jul 4 at 19:57
  • 'SIS' isn't a model name, it stands for something like 'Shimano Index System' – Argenti Apparatus Jul 5 at 13:06
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    Great photo identifying model of shifter. Can you add another of ye whole shifter clearly showing the damage where the halves have become separated? – Argenti Apparatus Jul 7 at 14:43
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Shimano calls this a "REVOSHIFT Shifter (3x8/7-speed)" and since its the left one, its only a three position shifter.

This model line is called Tourney and is the lowest named groupset. Its made down to a price and all the design decisions are about being cheaper and faster/easier to assemble. Downside of this is once its damaged they're generally a write-off.

You could spend ages and still not fix it. Instead I'd suggest you replace both rotary shifters with an equivalent pod or trigger shifter like the Tourney SL-TX50 left and right.

They will have a thumb lever to drive the chain up to the larger sprocket and a push button that drops the chain to a smaller sprocket. The left one is 2 or 3 positions, and the right one could be 6 or 7 or 8, so do make sure to get the same number as whatever's on your bike now.

I'd also suggest taking the opportunity to replace the two gear inner cables for a few dollars. And optionally treat yourself to a new pair of handgrips because the old ones will have to come off anyway.

Left shifter as documented at https://bike.shimano.com/en-US/product/component/tourney/SL-TX50-L.html From https://bike.shimano.com/en-US/product/component/tourney/SL-TX50-L.html

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