Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Front brake making loud noise

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Front brake making loud noise

Old 09-10-22, 06:36 AM
  #1  
curiousabe
Newbie
Thread Starter
 
Join Date: May 2022
Posts: 30
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 23 Times in 7 Posts
Front brake making loud noise

In the process of swapping a 105 group set for a dura ace 7700. Almost finished when I noticed the front STI makes a loud clicking noise when fully pressed. On further inspection it seems the the white plastic end cap on the cable hook unit (part nr 18 marked in red) is quite worn introducing some play and making the hole cable hook unit move when breaking.

On even further inspection it also seems that the same side of the actual mount/adapter (marked in green, part nr 15) is also quite worn on the right hand side where the worn cable house unit was fitted
  1. Does anyone know where I can buy a new cable hook unit? Tried one from the 105 groupset from the same era but that did not fit.
    According to this ad https://www.ebay.com/itm/27491179818...mis&media=COPY it is the same part for:
    1. Dura-Ace ST-7801 ST-7803 ST-7700 ST-7700-C
      Ultegra ST-6600 ST-6603 ST-6510
      105 ST-5600 ST-5600-S ST-5601 ST-5603
      Tiagra ST-4600 ST-4603
      Sora ST-3500 ST-3503
      Claris ST-2400 ST-2403
  2. Do you think a new cable hook unit will be enough or is the actual mount/adapter (part nr 15) too worn? From the video I took (14 seconds in https://photos.app.goo.gl/bpGcfb8EobovAtgD6) it looks like the white plastic end cap of the cable hook unit is sliding up towards the worn part of the metal mount/adatper and it is the actual adapter causing the wear on the plastic end cap.

    adapter





curiousabe is offline  
Old 09-10-22, 07:09 AM
  #2  
wrk101
Thrifty Bill
 
wrk101's Avatar
 
Join Date: Jan 2008
Location: Mountains of Western NC
Posts: 23,361

Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more

Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1169 Post(s)
Liked 780 Times in 528 Posts
eBay. Twenty + year old part. A bike shop might have one in their back room, but that will take far too much time to locate.

No prediction on whether this will solve your problem. But plastic wears a lot faster than metal. Very dirty in there.

I've had other problems with the 7700 series STI levers. Over time, I replaced all of them with micro shift levers.

Last edited by wrk101; 09-10-22 at 02:28 PM.
wrk101 is offline  
Old 09-10-22, 09:31 AM
  #3  
curiousabe
Newbie
Thread Starter
 
Join Date: May 2022
Posts: 30
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 23 Times in 7 Posts
Originally Posted by wrk101 View Post
eBay. Twenty + year old part. A bike shop might have one in their back room, but that will take far too much time to locate.

No prediction on whether this will solve. your problem. But plastic wears a lot faster than metal. Very dirty in there.

I've had other problems with the 7700 series STI levers. Over time, I replaced all of them with micro shift levers.
Yea found one on ebay but with shipping its like 35 eur lol..Am gonna move over the cable hook from the right lever to see if that works first though and maybe try and clean them in the meantime.
curiousabe is offline  
Old 09-10-22, 09:44 AM
  #4  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,077

Bikes: 1989 Cinelli Supercorsa

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1217 Post(s)
Liked 885 Times in 583 Posts
Originally Posted by curiousabe View Post
Yea found one on ebay but with shipping its like 35 eur lol..
Youíre participating in this sport, with Dura Ace, and you think 35 euros is a lot? Lol, indeed!
smd4 is offline  
Likes For smd4:
Old 09-10-22, 09:55 AM
  #5  
curiousabe
Newbie
Thread Starter
 
Join Date: May 2022
Posts: 30
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 23 Times in 7 Posts
Originally Posted by smd4 View Post
Youíre participating in this sport, with Dura Ace, and you think 35 euros is a lot? Lol, indeed!
For a small piece of metal barrel with 2 plastic end caps, yes
curiousabe is offline  
Likes For curiousabe:
Old 09-10-22, 10:26 AM
  #6  
Bad Lag
Senior Member
 
Join Date: Jul 2013
Location: So Cal, for now
Posts: 1,872

Bikes: 1975 Bob Jackson - Nuovo Record, Brooks Pro, Clips & Straps

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 786 Post(s)
Liked 385 Times in 238 Posts
I wish you the best of luck fixing this. The thing you are dealing with does not seem very C&V, despite its 20 year age.

Perhaps, the solution to your problem is to revert back to a truly C&V solution - brake levers that are just brake levers and shifters on the down tube that are just shifters. It's just a thought.

After playing around with newer tech, I reverted back to my bike's original configuration and couldn't be happier with it.

Sometimes, many times, simpler is better.
Bad Lag is offline  
Likes For Bad Lag:
Old 09-10-22, 10:42 AM
  #7  
embankmentlb
Senior Member
 
embankmentlb's Avatar
 
Join Date: May 2008
Location: North, Ga.
Posts: 2,276

Bikes: 3Rensho-Aerodynamics, Bernard Hinault Look - 1986 tour winner, Guerciotti, Various Klein's & Panasonic's

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 114 Post(s)
Liked 212 Times in 100 Posts
I have a 7700 equipped bike from new. It may have 50 thousand miles or even more at this point. I also have a 4400 Tiagra bike from that same era. The dura ace does everything marginally better for certain. My experience is DA is just that much more finicky with age.
I had to replace a sticky freehub, those cable hooks, rear shifter, the BB more than once.
The Tiagra probably has similar mileage and nothing replaced but the BB.

Dura Ace is worth the extra trouble.

I would also check that there is no play in the cable housing as in connects to the STI levers.
It is easy to create a gap when re-wrapping the bars.

Last edited by embankmentlb; 09-10-22 at 10:53 AM.
embankmentlb is online now  
Old 09-10-22, 10:51 AM
  #8  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,077

Bikes: 1989 Cinelli Supercorsa

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1217 Post(s)
Liked 885 Times in 583 Posts
Originally Posted by Bad Lag View Post
I wish you the best of luck fixing this. The thing you are dealing with does not seem very C&V, despite its 20 year age.

Perhaps, the solution to your problem is to revert back to a truly C&V solution - brake levers that are just brake levers and shifters on the down tube that are just shifters. It's just a thought.
I could have gone STI when I built my bike with 7700 20 years ago. So glad I didnít. Just looking at that exploded view diagram makes me nauseous.
smd4 is offline  
Likes For smd4:
Old 09-16-22, 11:59 AM
  #9  
curiousabe
Newbie
Thread Starter
 
Join Date: May 2022
Posts: 30
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 23 Times in 7 Posts
Found a new in package left lever for 70 eur, this should do the trick




PS, my other bike already has downtube shifters
curiousabe is offline  
Likes For curiousabe:
Old 09-16-22, 02:18 PM
  #10  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,077

Bikes: 1989 Cinelli Supercorsa

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1217 Post(s)
Liked 885 Times in 583 Posts
Niiiice...
smd4 is offline  
Old 09-26-22, 03:50 PM
  #11  
curiousabe
Newbie
Thread Starter
 
Join Date: May 2022
Posts: 30
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 23 Times in 7 Posts
Aaaand done (=


curiousabe is offline  
Likes For curiousabe:
Old 09-26-22, 04:51 PM
  #12  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,077

Bikes: 1989 Cinelli Supercorsa

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1217 Post(s)
Liked 885 Times in 583 Posts
Gorgeous bike!
smd4 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.