105 out of the box issues
I just got my new Shimano 105 5700 shifters delivered. Got them out of the box, looked them over, and everything worked and looked good. Once I got the cables installed and everything clamped on the bars the B lever on the right (rear derailleur) no longer wanted to work. It will push as far in as it goes before it clicks. Sometimes it rolls the mechanism back, but most times not. The A shifter works fine. As I was trying to find the problem the B lever got progressively worse so that now it won't work even sometimes.
Has anyone experienced this problem? If so is it fixable or should I just send it back? Bear in mind I have not fiddled with the mechanics, other than turning the allen screw located on the underside of the shifter by the clamp. (I thought this might be a trim adjustment, am I wrong?) |
Try this first:
1. Disconnect the cable at the rear derailleur. 2. Push the inner lever at least 10 times to be absolutely sure the shifter is in the highest gear (smallest cog) position. 3. Pull all of the slack out of the cable and reattach it at the derailleur. See if that fixes it. |
Originally Posted by alden
(Post 14039885)
Bear in mind I have not fiddled with the mechanics, other than turning the allen screw located on the underside of the shifter by the clamp. (I thought this might be a trim adjustment, am I wrong?)
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After further investigation I found that that allen screw on the underside of the shifter actually holds the various parts of the mechanism together. It extends up through the center of the parts and is secured to a nut at the top, behind the brake cable inside the housing. I don't think this screw was secured when I got it, because the problem starting before I tried to adjust anything. Once I got this secured properly, and got the cable drawn nice and tight like HillRider suggested (thanks btw) it works beautifully. Just as an insight that bolt is also held in place with a set screw that takes a 1.5 allen key. It's worth making sure it is tight to prevent the bolt from vibrating loose. The one in mine wasn't and may have allowed that bolt to come free. Thanks for your input guys.
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By the sound of it, either STIs have changed a great deal, or the above post is all kinds of wrong.
A 1.5mm allen head bolt (apparently in a vertical orientation) holding the mechanism together? That's a whole differnt animal to what I'm familiar with. |
My 105 5703 brifter for frond chainrings (left one) stopped working for no reason after some 50 kilometres. Maybe it was a bad piece, or the whole 5700 series is to be avoided? Have you fixed the problem?
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Ergo FTW. STI is poo.
Jury's still out on Doubletap, AFAIK |
Originally Posted by Kimmo
(Post 14042118)
By the sound of it, either STIs have changed a great deal, or the above post is all kinds of wrong.
A 1.5mm allen head bolt (apparently in a vertical orientation) holding the mechanism together? That's a whole differnt animal to what I'm familiar with. |
Originally Posted by Kimmo
(Post 14042587)
Ergo FTW. STI is poo.
Jury's still out on Doubletap, AFAIK |
Originally Posted by jimc101
(Post 14043104)
Broad statment there, having done many thousands of KM on STI's and Ergo, both work just as well as each other, never tried SRAM, so can't coment on that.
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2 Attachment(s)
http://bikeforums.net/attachment.php...hmentid=243434http://bikeforums.net/attachment.php...hmentid=243433These pics are tough, but if you look close you can see the post that goes up the center of everything. That hole directly below the arrow is where the small set screw is. I wish I took pics of everything when I had it apart. It all works now however and is installed on my bike. I don't want to tear it all apart now.
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Originally Posted by Kimmo
(Post 14042118)
By the sound of it, either STIs have changed a great deal, or the above post is all kinds of wrong.
A 1.5mm allen head bolt (apparently in a vertical orientation) holding the mechanism together? That's a whole differnt animal to what I'm familiar with.
Originally Posted by Kimmo
(Post 14042118)
Ergo FTW. STI is poo.
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Hands up who's overhauled both STI and Ergo.
/hand
Originally Posted by HillRider
(Post 14043264)
I've not worked on 5700 brifters but on 8 and 9-speed 105 brifters, there is a small allen head set screw installed vertically head-down under the shift mechanism. It acts as the retainer for the brake lever pivot pin and you have to remove it to take out pivot pin to remove the lever/shift mechanism from the brifter body. It has nothing to do with the shifting itself.
...Which I'm tipping are even more horribly complicated. Ergos are amenable to rebuild, repair and even modification, but I take my hat off to the man who can just fully comprehend Shimano's demented clockwork. All made of bent steel plate even on Ultegra, yum. It's as if - and I think I may be onto something here - they got the guy who does the fishing reels to come up with STI. It's just not... proper bike tech somehow, IMO. Campy's stuff is far more... appropriate. And don't get me wrong; I'm not prejudiced - IMO just about everything else Shimano does is better (particularly their rear hub), with the notable exception of the styling on their dead squid cranks. |
At first I thought "it had something to do with the shifting". After further exploration I found it really doesn't. However if it's not tight then the mechanics are too loose and won't engage properly. Admittedly I'm not a mechanic, just here looking for advice and sharing experiences.
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Sounds a bit different to what I know of the older ones... having a hard time making out much in that pic, your camera needs more light to make less noise.
The little allen screw secured the pivot pin for the lever, and that was it. Just bit up against a thinner section in the middle of the pin. The lever would work as normal until the pin worked its way out of place. |
Originally Posted by Kimmo
(Post 14043598)
Hands up who's overhauled both STI and Ergo.
/hand Ergos are amenable to rebuild, repair and even modification, but I take my hat off to the man who can just fully comprehend Shimano's demented clockwork. All made of bent steel plate even on Ultegra, yum. And don't get me wrong; I'm not prejudiced - IMO just about everything else Shimano does is better (particularly their rear hub), with the notable exception of the styling on their dead squid cranks. Ergo, at least through the '06 10-speed versions of Record and Chorus I have (pre-Escapemant, QS and the other "improvements"), are indeed rebuildable but I don't know if the current 10 and 11-speed versions still are. I've read they are not. |
3 Attachment(s)
http://bikeforums.net/attachment.php...hmentid=243455http://bikeforums.net/attachment.php...hmentid=243454http://bikeforums.net/attachment.php...hmentid=243453This is my shifter, the second pic is the small set screw, the third is the allen screw on the underside of the shifter (by the clamp). The screw undernieth was the one that was loose, and as a result the various parts were not sandwitched together tightly and not engaging properly. It goes straight through the center of the machanics and attaches in the top of the housing behind the brake lever. It would seem to me that the smaller set screw is in there to keep the larger screw from loosening, and it too wasn't tight, and may have been the cause.
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AFAIK Campy no longer does small spares, but I'm pretty damn sure Ergos remain rebuildable, since they still operate on the same principle (indexing devolutions aside).
Originally Posted by HillRider
(Post 14043693)
No question STI's are inscrutable and are use-until-they break-then-replace items.
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Originally Posted by alden
(Post 14043813)
http://bikeforums.net/attachment.php...hmentid=243455http://bikeforums.net/attachment.php...hmentid=243454http://bikeforums.net/attachment.php...hmentid=243453
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Yes, from what I've gathered online and in magazines this is "trickle down technology" from Dura ace. Is that true? I've never seen a Dura ace shifter disassembled.
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Originally Posted by Kimmo
(Post 14043828)
AFAIK Campy no longer does small spares, but I'm pretty damn sure Ergos remain rebuildable, since they still operate on the same principle (indexing devolutions aside).
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Originally Posted by Kimmo
(Post 14043598)
Hands up who's overhauled both STI and Ergo.
/hand Yeah, of course I knew that, but I was thrown by the description implying it had something to do with the shifting, plus the fact I haven't had a play with any of the new ones without the exposed cables. ...Which I'm tipping are even more horribly complicated. Ergos are amenable to rebuild, repair and even modification, but I take my hat off to the man who can just fully comprehend Shimano's demented clockwork. All made of bent steel plate even on Ultegra, yum. It's as if - and I think I may be onto something here - they got the guy who does the fishing reels to come up with STI. It's just not... proper bike tech somehow, IMO. Campy's stuff is far more... appropriate. And don't get me wrong; I'm not prejudiced - IMO just about everything else Shimano does is better (particularly their rear hub), with the notable exception of the styling on their dead squid cranks. Which is why I was disappointed when some beautifully preserved RSX and RX100 brifters came my way - and didn't work at all. However I've blasted three out of four clean and squirted teflon lube inside and they work. The fourth has a small piece of frayed cable and it's nipple jammed inside. So tomorrow I'm going to strip them down (first time I've ever tried this) according to these posts http://www.bikeforums.net/showthread...%29-STI-Levers http://www.bikeforums.net/showthread...%29-STI-Levers and lube them properly while removing that pesky cable - how hard can it be? I've been a Campagnolo fan for over forty years (and still am), but in the current recession I can't turn down quality parts by Shimano, Suntour, Huret etc. that come my way for free! (Translation = middle-aged tight wad!) |
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