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Help Needed Setting Up "Cyclo" Rear Derailleur Cable on a 60's Jack Taylor Tandem

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Help Needed Setting Up "Cyclo" Rear Derailleur Cable on a 60's Jack Taylor Tandem

Old 05-07-11, 02:11 PM
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Beagle2
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Help Needed Setting Up "Cyclo" Rear Derailleur Cable on a 60's Jack Taylor Tandem

Hello,

Setting up the mech on our tandem is gradually driving me mad. I brought the bike last year. Although in vgc I decided to rebuild it over the winter.

I can't seem to get the cable set up correctly on the French Cyclo derailleur. It was working smoothly before I took it apart (!). Unfortunately I can not remember how it was configured.

I have followed the instructions on https://www.classiclightweights.co.uk/standardcyclo.html ,however I think mine is slightly different. It is 5 speed with braze on fitting and frustratingly no form of cable adjustment.

My main questions are:
  • Should the cable be wrapped once round the rear drum (see pic)?
  • Should the cable cross over before it reaches the lever?
  • Should it be: lever pulled back for low gears, pushed forward for high?
  • On the Classic lightweights page, does point 4 and 7.4 contradict each other?

Any help would be greatly appreciated!

Happy cycling

Tim
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Old 05-07-11, 08:27 PM
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Hi. Sadly, I'm no help. BUT I suggest you post this in the Bike Mechanics forum, rather than C&V, just because that's where the wrenching expertise hangs out.

Also, you might post to the Classic Rendezvous list. I know there are several Jack Taylor tandem owners there. The expertise for this is certainly there.

Good luck.
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Old 05-08-11, 05:55 AM
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Thank a lot for advice, I've moved it over.
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Old 05-09-11, 05:57 AM
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Bump in hopes that Zaphod Beeblebrox will see it!
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Old 05-09-11, 10:05 AM
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Oh hey! Yeah I just did this a couple of weeks ago on my '39 Dawes.

I had spent hours re-reading those Classic Lightweight instructions only to find myself throwing them out the window when I actually sat down and started to work on it.

you're gonna want the cables to cross just above the drum on the Mech. as shown in this pic

note: It will actually work either way, but works better with the cables crossed as shown above.

also note: Classic-Lightweights notates that picture as the "New Type with crossed cables" but regardless of the age of your mech you can set up the 3, 4 or 5 speed with the cables crossed. IMO they work better with the cables crossed.

Let me see if I can do a step-by-step that's a little better than Classic Lightweights has. Just for clarity, the "Mech" is the part of the unit that consists of the axle, drum, the arm and the jockey pulley.

The following assumes you've got the shifter, cable and mech mounted on the bike. If not, start with that, then....



1. Remove Nut #1 (see my annotated pic) and pull the mech off the mount
1a. Pull the Cable off the shifter.
2. feed the Bare wire and its nipple through the mount. Keep the milled Balls and the Cable housing on the top-side of the mount.
3. take the mech and orient it so the arm is pointing up and the axle is pointing towards the non-drive side. (IE: hold it the Wrong way)
4. Stick the Nipple on the cable into the Seat on the mech's drum. Hold it in the seat well with your finger...it has a tendency to pop out until you've completed the next step.
5. Keeping the Mech in that orientation (step 3), wrap the cable around the drum once. Once you've done this the nipple will stay in the seat pretty well so you don't have to worry about it popping out.
6. Now the Trick move: Keeping the wires wrapped as you've got them on the drum, rotate the mech 180 degrees so the axle is facing the correct way (the drive side) and then flip it so the arm is pointing down. You should now see the crossed cable setup as pictured.
7. Put the mech back in the mount and screw nut #1 back on.

8. The mech will now be in *some* position. Maybe all the way low, maybe all the way high...maybe in the middle....Take a Flat head screw driver, put it in the slot on the end of the Mech's axle and turn it until its at the High limit (all the way to the smallest gear). This will move the cables around a bit.

9. now rotate the shifter so that you can seat the nipple. Hook the nipple up to the seat in the shifter and finish up by hooking the milled balls into their seats on the back of the shifter.



You adjust the high stop by turning the nuts on the mech's axle on either side of the mount.

Geez...it looks a lot more complicated typed out than it is to do....
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Last edited by Zaphod Beeblebrox; 05-09-11 at 10:56 AM.
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Old 05-17-11, 02:48 PM
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Thanks so much Zaphod and RHM.

I will have another go at the weekend. The only difference I can see is that my cables (at the mech end) are in the "6 o clock position" and not the 12 o clock.

I'll let you know how it goes

Thanks again!
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