Dead 600 Brifters
09-02-19, 11:37 AM
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Dead 600 Brifters
I have a set of first gen 600 dual control shifters, and they're dead. I've tried the usual degrease and lube thing, still nothing working. Should I throw these things out? Doesn't look like they're rebuildable.
09-02-19, 05:32 PM
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When you wrote that you degreased them, did you submerge them in a solvent. I used to own bike stores and have see/ fixed hundreds of (mostly mtn bike) shifters, where the grease that shimano uses hardens, making the pauls stuck. The mtn bike shifters are easily taken apart, but the road ones are not so submerging is your best option.
09-02-19, 06:00 PM
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Not too hard to take apart and put back together. Usually the pawls get corroded to the shaft and working them back and forth can free them up.
https://www.bikeforums.net/bicycle-m...ti-levers.html
https://www.bikeforums.net/bicycle-m...ti-levers.html
09-02-19, 07:49 PM
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Peel the rubber grips off. Chunk them in a container of diesel fuel. Get elbow length nytrile gloves. Goggles. Excercise the internals. Dunk & soak. After about a week they'll be good as new.
09-02-19, 09:45 PM
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When you wrote that you degreased them, did you submerge them in a solvent. I used to own bike stores and have see/ fixed hundreds of (mostly mtn bike) shifters, where the grease that shimano uses hardens, making the pauls stuck. The mtn bike shifters are easily taken apart, but the road ones are not so submerging is your best option.
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AndrewRStewart
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09-02-19, 10:12 PM
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You can probably bring them back to life if you follow the instructions from the above posters, but the thing is, those shifters were great 30 years ago, today, you can replace them with Shimano Sora or Microshift shifters that are more ergonomic, inexpensive, and just plain work better. It all just depends on how much your "tinkering time" is worth.
09-03-19, 12:40 PM
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I see old brifters donated all the time to the non-profit where I volunteer. I've fixed dozens, and only once did I run across one with a broken spring that I thought wasn't worth fixing.
I try a shot of WD-40 and a half hour wait first. If that doesn't do it, it comes off the bike and into the ultrasound cleaner. After that comes disassembly and poking around with a dental pick to find the sticking pawl.
I try a shot of WD-40 and a half hour wait first. If that doesn't do it, it comes off the bike and into the ultrasound cleaner. After that comes disassembly and poking around with a dental pick to find the sticking pawl.
09-03-19, 04:05 PM
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This is similar,
Be careful taking off the name plates and you should be able to reuse them. I use a a piece from an old ballpoint pen to hold the spring, but you can get it on there without it.
Be careful taking off the name plates and you should be able to reuse them. I use a a piece from an old ballpoint pen to hold the spring, but you can get it on there without it.
09-04-19, 10:12 PM
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Update: pulled the units apart, got both working again, now having a hell of a time getting the spring back in for reassembly.
09-09-19, 10:44 PM
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Got them back together using an inflation needle for sports balls, made the opening at the bottom of the needle slightly bigger with an awl, and it works like a hot damn.
09-09-19, 10:54 PM
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09-10-19, 12:12 AM
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09-10-19, 01:43 AM
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Name plate
If you did manage to screw up the name plate, I've ordered replicas from ebay. Some were out of Poland, but there was one seller in the US. Search for "ultegra 600 sti 6400 resin dome" and you should be in spitting distance. The right lever of mine was missing the dome entirely and the aluminum plate's adhesive wasn't very tacky anymore.
