OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
Ok mate...is threadlock a brand name ? Ill google it..cheers
Campag shifter not clicking
- Thread starter BigonaBianchi
- Start date
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accountantpete
OAP
It's quite expensive - you need the blue Loctite 242 and only need one drop so scrounge some when you can
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
Thanks..I'll try.
The bike is back rideable now...its not perfect as it still jumps the one cog like it did before i decided to fit the new cable and this 'adventure' began. But its rideable.
Can I ask a question about the rear mech?
I dont think the mech itself is bent (as per other thread in this section) but there is a pivot on which the rear mech moves when it moves across the cogs..it looks like a rivet or something. Now looking at the mech it seems to me that if I could reset the position of the mech using that pivot point it would line up perfectlu over the chain. Currently it seems ever so slightly off. The cage isnt bent and it hasnt recieved any knocks etc...but its been a few years since it was serviced properly so it could have worked loose I guess.
I can swivel th erear mech by hand a fraction of a mm just so it sits over the smallest cog exactly..when I let go it reverts to just off kilter..only a fraction of a mm but i guess this is all that sleft to expalin this single cog jumping Im getting when all the other cogs are fine. Ive checked all the teeth and cant see any thing obviously wrong or worn.
Thanks again
The bike is back rideable now...its not perfect as it still jumps the one cog like it did before i decided to fit the new cable and this 'adventure' began. But its rideable.
Can I ask a question about the rear mech?
I dont think the mech itself is bent (as per other thread in this section) but there is a pivot on which the rear mech moves when it moves across the cogs..it looks like a rivet or something. Now looking at the mech it seems to me that if I could reset the position of the mech using that pivot point it would line up perfectlu over the chain. Currently it seems ever so slightly off. The cage isnt bent and it hasnt recieved any knocks etc...but its been a few years since it was serviced properly so it could have worked loose I guess.
I can swivel th erear mech by hand a fraction of a mm just so it sits over the smallest cog exactly..when I let go it reverts to just off kilter..only a fraction of a mm but i guess this is all that sleft to expalin this single cog jumping Im getting when all the other cogs are fine. Ive checked all the teeth and cant see any thing obviously wrong or worn.
Thanks again
accountantpete
OAP
Re the rear mech - you need to work through the potential causes systematically.
Turn the bike upside down and check that the upper jockey wheel (nearest the sprockets) is perfectly in line with each sprocket for every click of the shifters (You can easily see this as the sprocket teeth will be riding in the very centre of the chain and not to one edge).
If that's the case then it's not the rear mech causing the problem. If the jockey wheel doesn't fall in line over a sprocket then we need to look at the mech/shifters.
Turn the bike upside down and check that the upper jockey wheel (nearest the sprockets) is perfectly in line with each sprocket for every click of the shifters (You can easily see this as the sprocket teeth will be riding in the very centre of the chain and not to one edge).
If that's the case then it's not the rear mech causing the problem. If the jockey wheel doesn't fall in line over a sprocket then we need to look at the mech/shifters.
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
Ok..I turned it upside down and ran through the clicks up and down. The jockey wheel looks lined up to me over each cog..but it still jumps one cog. I guess at least the mech is proven now then. I've cleaned everything so its not clogged with gunk at all...the chain is shining like new and the cogs clean and free of dirt etc. The cable is new and lubed well in the casing.
accountantpete
OAP
Next step is the shifters.
If you can - click the lever all the way so that the chain is on the biggest sprocket. Then loosen the cable and set the chain on the 5th sprocket then tighten up the cable so that the rear mech presents over that 5th sprocket and then click down on the thumb.
What we are doing is using is using the shifters to move from their 1 - 5 and the rear to move from 5-10.
This way will eliminate the shifters as a cause of the problem.
If you can - click the lever all the way so that the chain is on the biggest sprocket. Then loosen the cable and set the chain on the 5th sprocket then tighten up the cable so that the rear mech presents over that 5th sprocket and then click down on the thumb.
What we are doing is using is using the shifters to move from their 1 - 5 and the rear to move from 5-10.
This way will eliminate the shifters as a cause of the problem.
RecordAceFromNew
Swinging Member
- Location
- West London
Hopefully not disrupting accountantpete's excellent advice to you here, but a common reason for perfect indexing for most but not all gears is wrong cable routing at the rear mech's cable clamp. Perhaps worth a quick visual check that the cable is under the plate which has to be suitably orientated and running below not above the allen bolt, see this.
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
Ok chaps...looking at my cable it seems it is on top of the screw not under it. So ill change that and see what happens...if not then ill do the shifter thing..
..getting there
..getting there
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
Ok..I set the cable under the screw...retightened the cable but no joy..it still slipped on the second smallest cog.
Uploaded with ImageShack.us
This how I had the cable attached
Uploaded with ImageShack.us
How I have it attached now
I took the chain up to the biggest cog with the shifters. Loosened the cable and put the chain on the fitth cog with my hands. At this point the mech wanted to pull to the smaller cogs...it doesnt sit over the fifth cog exactly...unless I push it over with my hand.
Anyway I tightened it all up and the shifter runs out of clicks at the fifth sprokett and cant go to the bigger cogs..just down to the smaller ones.
I'
Uploaded with ImageShack.us
This how I had the cable attached
Uploaded with ImageShack.us
How I have it attached now
I took the chain up to the biggest cog with the shifters. Loosened the cable and put the chain on the fitth cog with my hands. At this point the mech wanted to pull to the smaller cogs...it doesnt sit over the fifth cog exactly...unless I push it over with my hand.
Anyway I tightened it all up and the shifter runs out of clicks at the fifth sprokett and cant go to the bigger cogs..just down to the smaller ones.
I'
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
..eek the cable is fraying again...
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
could this be an issue with the smaller cogs? There are no broken or worn teeth that i can tell...but as I turn the crank and look down over the smaller cogs they seem to slightly move out on each revolution...wish i could get a video on here...best i can describe it is like a wheel that needs trueing a touch in one place. its almost not noticeable..??
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
took it all apart again and fitted another cable...reset it all... but still skips over the second smallest cog only...I can ride it like this but its just irratating...LBS?
accountantpete
OAP
could this be an issue with the smaller cogs? There are no broken or worn teeth that i can tell...but as I turn the crank and look down over the smaller cogs they seem to slightly move out on each revolution...wish i could get a video on here...best i can describe it is like a wheel that needs trueing a touch in one place. its almost not noticeable..??
If you have tested the mech and the shifters then it leaves the sprockets or the freewheel.
I'd firstly take the cassette off and give everything a good clean - especially the spacers - and see if that cures the wobble.
Also have a check as to whether the freehub has any play in it.
OP
OP
BigonaBianchi
Yes I can, Yes I am, Yes I did...Repeat.
- Location
- Iskele TRNC & Mordor UK
ok...thanks.
I think the shifters and the mech are ok. My instinct is telling me its a problem in th esecond smallest cog or the hub...
How do I check if the hub has any play in it?
Removing the cassette...ok..I may have the right tools..Ill look...but I'll wait for that learning curve for today lol!
I think the shifters and the mech are ok. My instinct is telling me its a problem in th esecond smallest cog or the hub...
How do I check if the hub has any play in it?
Removing the cassette...ok..I may have the right tools..Ill look...but I'll wait for that learning curve for today lol!
accountantpete
OAP
Give the cassette a good shake - if it moves then it either needs tightening up or there is play in the freehub.
