downtube barrel adjuster broken...

[Vapin' Joe]

That's Hollowtech adjusters for you.

 

[Ming the Merciless]

Nobody has suggested this yet !


New Bike Time !

What you should have said is

It’s Hammer Time!


View: https://youtu.be/otCpCn0l4Wo

 

[Mazz]

They cannot be drilled out (too hard) the only way to get them out is 'spark erosion'.

I tried that method, but it didn't quite go to plan.

 

[Mazz]

Update: Breakthrough at last.

Combination of metal drill bits and (not so) "easy-out".

Now it's cleaned out and ready for a new barrel adjuster.

I *think* it's this M5 one. What do you think?
https://www.sjscycles.co.uk/cables/jagwire-m5-index-barrel-adjuster-black-each/

 

[fossyant]

Phew. Stick a load of waterproof/marine grease on the threads to stop this happening again. Well done...

 

[Mazz]

Phew. Stick a load of waterproof/marine grease on the threads to stop this happening again. Well done...

I've got a tube of white lithium grease, is that waterproof?

 

[fossyant]

I've got a tube of white lithium grease, is that waterproof?

Good enough.

 

[Mazz]

Does anyone know what the spring clip is for on this barrel adjuster? Is it meant to be an alternative to the small spring of the original barrel adjuster?
https://www.sjscycles.co.uk/cables/jagwire-m5-index-barrel-adjuster-black-each/

 

[raleighnut]

Does anyone know what the spring clip is for on this barrel adjuster? Is it meant to be an alternative to the small spring of the original barrel adjuster?
https://www.sjscycles.co.uk/cables/jagwire-m5-index-barrel-adjuster-black-each/

Yep but it also holds the adjuster still by the 'indents' on the black bit so less likely to drift out of adjustment due to vibration.

 

[cyberknight]

Are the threads still good now you have drilled it out ?

 

[Mazz]

Are the threads still good now you have drilled it out ?

Just about. I screwed in an M5 bolt to test it out, went in ok.

 

[cyberknight]

Just about. I screwed in an M5 bolt to test it out, went in ok.

great, maybe with a few goes it might grind the threads enough to be good , i had a similar issue with my rear brake where it had seized with rust and destroyed the old barrel adjuster getting it out .

 

[Mazz]

Finished off the job today...new barrel fitted (lithium greased), new gear cable fitted. Front derailleur adjusted with the help of this video.

View: https://youtu.be/ZNG7g83lI-s?si=CN9JF1pTuc9QFTcI

 

[cyberknight]

Finished off the job today...new barrel fitted (lithium greased), new gear cable fitted. Front derailleur adjusted with the help of this video.

View: https://youtu.be/ZNG7g83lI-s?si=CN9JF1pTuc9QFTcI

im going to re do my commuter bike as im not happy with it , i think i need to disconnect the cable and start from the beginning as the cable is too tight even with the barrel adjuster is wound in and although the shifting works the trim point seems to be halfway up the cassette and there is way to much movement on the h stop

 

[laurentian]

im going to re do my commuter bike as im not happy with it , i think i need to disconnect the cable and start from the beginning as the cable is too tight even with the barrel adjuster is wound in and although the shifting works the trim point seems to be halfway up the cassette and there is way to much movement on the h stop

After many times trying to adjust a front derailleur, I have learned that this approach saves time in the long run. Start at the very beginning as per the Park Tools video above and you'll get there.