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Help needed, Campagnolo f.d. rod seized

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Help needed, Campagnolo f.d. rod seized

Old 10-03-12, 10:28 AM
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balkanac
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Help needed, Campagnolo f.d. rod seized

I need help with Campagnolo gran sport f.d. from 1950s here is link on my thread in C&V part of forum- http://www.bikeforums.net/showthread...rt-f-d-problem

Does anyone have experience with this problem?
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Old 10-03-12, 01:23 PM
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These are usually fixed with some patience and penetrating oil. see my detailed answers in the original thread on C&V.
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Old 10-03-12, 03:31 PM
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Thanks for advice i will try it.

I ve posted some more pics regarding bent shaft, i presume that bent should be visible but it seems ok to me.

Can you confirm my opinion?

Thanks
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Old 10-03-12, 03:40 PM
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Originally Posted by balkanac View Post

I ve posted some more pics regarding bent shaft, i presume that bent should be visible but it seems ok to me.

Can you confirm my opinion?

Thanks
You can't always spot a bent rod, since the spring pulls the it into the box, until the bend jams, but is out of sight. That's why I suggest trying to drive the rod out a bit to see if it will go in that direction, then you can check it, straighten it if needed, and drive it back through the box.
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Old 10-03-12, 08:39 PM
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Originally Posted by FBinNY View Post
You can't always spot a bent rod, since the spring pulls the it into the box, until the bend jams, but is out of sight. That's why I suggest trying to drive the rod out a bit to see if it will go in that direction, then you can check it, straighten it if needed, and drive it back through the box.
I use one of those on a bike I ride very regularly. Indeed they are prone to allow crud to pack up inside the box and seize the rod (this was the condition of mine when I bought it). soak it in some solvent for a while than take a wooden or rubber hammer and pound it out (don't use a metal hammer as you can mushroom the end of the rod; don't ask how I know that).
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Old 10-05-12, 03:46 AM
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Since this is rare and old mech and there isn t very much troubleshooting info i ve decide to make little tutoriral for all who might find themself in same situation.

You need- release solvent/ penetrating oil
- rubber malet and regular hammer
- something with same diameter as rod( in my case drill bit no. 6 )
- something that can be used to pinch d. body( in my case little work bench)
- blow dryer
Procedure

1. Soak degreased body for one day in p. oil.
2. Remove from oil and use blow dryer to heat it up
3. Pinch body and use rubber malet to hammer the rod as close as posilby to body
4. Us something with diameter and rubber malet to drive rod in body.
5. When rod enters body switch to regular hammer and hammer it out.

Be careful not do damage tip of rod with hammering and use padding when pinching body.

Hope this helps so you don t have to change nuovo record mech

Pics

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