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Threading cables through internal stops
I recently acquired a used Cervelo P2K frame, which has internal cable
runs inside the top tube. However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. -- Remove the ns_ from if replying by e-mail (but keep posts in the newsgroups if possible). |
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#2
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Threading cables through internal stops
On Tue, 1 Apr 2008 15:31:30 -0400, David Kerber
wrote: I recently acquired a used Cervelo P2K frame, which has internal cable runs inside the top tube. However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. Dear David, Tape a long thread to the end of a bare wire cable. Push the wire through the frame and past the exit hole. Fish through the exit hole with a small wire hook, snag the thread, and pull it out the exit hole. (You can make the hook out of a single strand of cable wire.) Use the thread to guide the wire out the exit hole. It's much easier to coax the end of the cable through the hole if the thread is taped so that it comes off the end of the cable: ___thread_______ \ _______/ /////////TTTT wire tape Run the cable housing over the wire and then push it through the frame. Cheers, Carl Fogel |
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Threading cables through internal stops
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#4
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Threading cables through internal stops
On Apr 1, 9:31*pm, David Kerber
wrote: I recently acquired a used Cervelo P2K frame, which has internal cable runs inside the top tube. *However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? *I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. -- Remove the ns_ from if replying by e-mail (but keep posts in the newsgroups if possible). I've used the threaded end of a spoke to grab a housing by poking the spoke into the end of the casing as it came near the hole in the frame while feeding the housing through from the other side. Use your mouth to hold the flashlight! Joseph |
#5
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Threading cables through internal stops
In article ,
David Kerber wrote: I recently acquired a used Cervelo P2K frame, which has internal cable runs inside the top tube. However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. My first attempt. * Put top tube vertical in a bicycle work stand. * Drop dental floss and a small weight into top hole. * Flashlight and tweezers (or clamp hemostat) at the other top tube hole. * Grab dental floss. -- Michael Press |
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Threading cables through internal stops
On Tue, 1 Apr 2008 16:20:46 -0400, David Kerber
wrote: In article , says... On Tue, 1 Apr 2008 15:31:30 -0400, David Kerber wrote: I recently acquired a used Cervelo P2K frame, which has internal cable runs inside the top tube. However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. Dear David, Tape a long thread to the end of a bare wire cable. Push the wire through the frame and past the exit hole. Fish through the exit hole with a small wire hook, snag the thread, and pull it out the exit hole. (You can make the hook out of a single strand of cable wire.) Use the thread to guide the wire out the exit hole. It's much easier to coax the end of the cable through the hole if the thread is taped so that it comes off the end of the cable: ___thread_______ \ _______/ /////////TTTT wire tape Run the cable housing over the wire and then push it through the frame. That's sort of what I was thinking of, but thanks for confirming and filling in the details! If it's more convenient you can use a vacuum cleaner to get the thread into the exit hole. Ron |
#8
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Threading cables through internal stops
On Apr 1, 1:20*pm, David Kerber
wrote: In article , says... On Tue, 1 Apr 2008 15:31:30 -0400, David Kerber wrote: I recently acquired a used Cervelo P2K frame, which has internal cable runs inside the top tube. *However, as I was starting to assemble it, I discovered that the section of cable casing that runs inside the top tube had come out of its place at the holes and was sliding around inside the top tube. I had no trouble removing the casing from the tube and verifying that there was nothing wrong with it, and that there's nothing else loose inside the frame. However, what is the trick for getting this (or a replacement) cable housing back in place? *I imagine I could come up with something which would require a ton of trial and error to get the end of the cable through the holes, but was hoping there was some special technique somebody could describe or point me to, to help me along. Googling turned up information that it is not supposed to be difficult to service, but had no details. Dear David, Tape a long thread to the end of a bare wire cable. Push the wire through the frame and past the exit hole. Fish through the exit hole with a small wire hook, snag the thread, and pull it out the exit hole. (You can make the hook out of a single strand of cable wire.) Use the thread to guide the wire out the exit hole. It's much easier to coax the end of the cable through the hole if the thread is taped so that it comes off the end of the cable: * ___thread_______ * * * * * * * * * \ * * * * * * *_______/ * /////////TTTT * wire * * *tape Run the cable housing over the wire and then push it through the frame. That's sort of what I was thinking of, but thanks for confirming and filling in the details! The problem with using thread is that it isn't very strong. Most of the time it's okay. It's not so much that the cable might get caught on a run and break the thread. Rather, the problem is that you can't use thread to strangle people who think internal cable routing is a good idea; you need to use monofilament line, at least. Ben A good mechanic cures the disease rather than the symptom. |
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