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Old 09-06-09, 03:12 AM   #1
blowakilo
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Rear Derailleur Issue

I have a Shimano 600 rear derailleur with 105 shifters. When I try and shift up on the rear eight the derailleur does not move. The cable is flexing all the way down to the derailleur but nothing happens. I know this is my first post, but really this is the first issue that has really brought me here. Halp?

Thx in advance
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Old 09-06-09, 06:12 AM   #2
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hello. are any parts in the system new? or was it working then stopped? chances are (if it is new) you need to adjust your limit screw. the first thing I would do is slowly turn the cranks and push the derailluer in manually and se that it moves freely, to all the cogs. if not then you need to adjust the limit screw to allow it to move 'in' more. next leave the derailluer on the biggest cog to let slack on the cable. slip it through the slots on the housing stops. this will allow tou check for free movement of the cable through the housing. wipe it off and lightyl relube it with some light oil. put it back together and try and adjust it again.

OH you didn't take a spill did you? make sure you hanger is not bent. hope this helps
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Old 09-06-09, 06:53 PM   #3
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no I didn't take a spill, when I got it the stuff was in this condition. It looks like it is in really good shape it just will not move. It is all like basically brand new. That did help a lot thank you, as soon as I get home I will test out your advice.
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Old 09-07-09, 07:55 AM   #4
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Likely problems:

1. Does this bike have a kick stand? Sometimes, in the process of installing a kickstand, the rear shift cable gets pinched to where it can't move.

2. Limit screws. Your rear derailleur has 2 adjustment screws that determine how far inward and outward it will move. I've had people bring bikes in to me after they had screwed them both in thinking they were "loose".

3. If this is an old bike, sometimes that short cable housing adjacent to the derailleur gets so rusted that it freezes the shift cable.
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Old 09-07-09, 01:23 PM   #5
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You might want to try pedalling or it won't shift.
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Old 09-07-09, 01:41 PM   #6
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You might want to try pedalling or it won't shift.
Yeh that's helpful to the OP! FFS!

My 'guess' is that either the limit screws need adjustment or the cable isn't as tight as it should be.

Ben
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Old 09-08-09, 04:30 PM   #7
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No ****? Obviously I would not make a thread about a rear derailer not moving across the cogs with out trying to shift while actually peddling, dude. Thanks for your invaluable input!
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Old 09-08-09, 05:09 PM   #8
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No ****? Obviously I would not make a thread about a rear derailer not moving across the cogs with out trying to shift while actually peddling, dude. Thanks for your invaluable input!
That's just operator. He's the forum's current curmudgeon and seem to forget he too didn't know everything at one time.
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Old 09-24-09, 12:31 PM   #9
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That's just operator. He's the forum's current curmudgeon and seem to forget he too didn't know everything at one time.
First of all I'm not old, and secondly, I am used to a forum where people don't as soon as someone starts swearing or becomes agitated, in fact it is encouraged. That one time when I didn't know everything is right know, hence why I am asking this question. People get so freakin' upset over nothing these days, sheesh! Its the internet bro's and broette's.

In all seriousness, I tried loosening the limit screws and it did help, but the rear dérailleur would still not force the chain down any lower. Once loose, it would however move more freely and even move further up toward the spokes, obviously not a good thing. It seems like the shifter is set thinking the chain is on the smallest cog, when really it is on the opposite side on the biggest. I just cannot get it to move downward since the dérailleur will not budge. I think I am just going to take the entire thing apart and re build it. Thanks to a wonderful shop in my town I am now just starting to learn, for free, how to build/maintain a bicycle. I see bicycle mechanics in your future! Thanks to everyone who tried to help, and didn't cry as soon as I attempted to swear, obviously I am the uber noobian to this board and posted s h i t without any spaces.
Sorry for the wall of text.
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Old 09-24-09, 12:43 PM   #10
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I would remove the RD (rear-derailleur in Mechanicese) and clean it thoroughly. Then apply a good lubricating oil such as TriFlow with Teflon. I would have a new cable and new housing ready to go also. Then I'd proceed to reinstall the RD with the new cable/housing and, in the process, work with the set-screws to properly space the travel of your RD.

Here's a couple of links for you:

http://www.parktool.com/repair/readhowto.asp?id=64

And...

http://bicycletutor.com/adjust-rear-derailleur/

One item you may need and not have is a proper set of bicycle-specific cable-cutters. Using lesser cutters - like those found on some pliers - will mundge your cable causing it to fray, and pulverize your housing. So you might want to take it to a bike-shop for this part of the job.

Good luck!

P.S. - This forum has been improving steadily in terms of people practicing diplomacy when addressing others. operator can be quite abrasive. But this is tolerated due to his vast knowledge. We've all come to expect this from him, but newbies are always a favorite victim of his. On behalf of us who do care - sorry you two met.

Last edited by Panthers007; 09-24-09 at 12:46 PM.
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Old 09-28-09, 08:37 PM   #11
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I would remove the RD (rear-derailleur in Mechanicese) and clean it thoroughly. Then apply a good lubricating oil such as TriFlow with Teflon. I would have a new cable and new housing ready to go also. Then I'd proceed to reinstall the RD with the new cable/housing and, in the process, work with the set-screws to properly space the travel of your RD.

Here's a couple of links for you:

http://www.parktool.com/repair/readhowto.asp?id=64

And...

http://bicycletutor.com/adjust-rear-derailleur/

One item you may need and not have is a proper set of bicycle-specific cable-cutters. Using lesser cutters - like those found on some pliers - will mundge your cable causing it to fray, and pulverize your housing. So you might want to take it to a bike-shop for this part of the job.

Good luck!

P.S. - This forum has been improving steadily in terms of people practicing diplomacy when addressing others. operator can be quite abrasive. But this is tolerated due to his vast knowledge. We've all come to expect this from him, but newbies are always a favorite victim of his. On behalf of us who do care - sorry you two met.
Thank you for the kind/helpful feedback. I really appreciate it. I fully understand how people who have been on a board for years and years can get when the n00bians come into play, so my feelings are not even close to hurt. I will update you guys once I actually get around to fixing this, I have been riding my Scott speedster S50, and even with the Sora parts I still love it, the bike rides like a dream. Soon I will incorporate my 105 group set into the Scott for maximum enjoyment.
(not that the lugged carbon fiber frame that currently has the 105 set on it is bad, I just really REALLY like the Scott).
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Old 09-28-09, 08:41 PM   #12
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No ****? Obviously I would not make a thread about a rear derailer not moving across the cogs with out trying to shift while actually peddling, dude. Thanks for your invaluable input!
You can't rule anything out when diagnosing something over the internet/phone. I really wasn't trying to make fun of you. You'll know it when I am.
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Old 09-28-09, 08:55 PM   #13
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That reminds me of when I did ISP support, a dude a couple of cubes away had a call go just about a half hour before they got down to the nitty-gritty : The modem's power cable wasn't plugged into an outlet!
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Old 09-29-09, 07:25 AM   #14
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You can't rule anything out when diagnosing something over the internet/phone.
Truest statement on BF.
I remind myself of this with every thread I read.
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Old 09-29-09, 08:36 AM   #15
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OP, you will learn to respect operator for his knowledge and PERHAPS you will even come to appreciate his sense of humor (or lack of).

Welcome to the forum.
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