Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-11-10, 01:51 AM   #1
mraceebb
Newbie
Thread Starter
 
Join Date: Jul 2007
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Paul Canti Pivot Sleeves Stuck

Need some repair help with something I haven't seen before. I was at a friends house helping him work on setting up his Miyata 1000 with some more modern parts. He had started putting on some paul touring cantis but it looked like the bike was originally made for 700's so they didn't quite reach right. He put them on about a month ago, has been super busy, and so today we went to take them off and put on some tektro cr720s.

When we took off the paul brakes, we found that the pivot sleeve was stuck on both of the canti-bosses. We tried pulling them off with hands, pliers and wrapped in a towel, and then just some pliers, but neither one would budge. There's also very little to grab. I did a google search but couldn't find anyone talking about something similar happening. It's just a sleeve, so I am surprised that it is so stuck on both sides. He said he's pretty sure he greased the posts (he's pretty good on that kinda stuff) and I imagine that the bosses and posts are steel, so seizing would be somewhat unlikely.

Anyone have any ideas on how to remove these. I am inlcuding a pic of the sleeves stuck on the bosses, and then one pic of what the sleeves look like when not on the bike.

Thanks in advance for any ideas.




mraceebb is offline   Reply With Quote
Old 06-11-10, 03:10 AM   #2
Torchy McFlux
Senior Member
 
Torchy McFlux's Avatar
 
Join Date: Sep 2007
Location: Vancouver
Bikes: NOYB
Posts: 1,438
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've gotten ones like that off by heating them with the flame of a propane torch, then twisting off with vise grips.

Overtightening the mounting bolts can cause the canti bosses to mushroom out a bit and cause seizing. If that's what happened, your friend should invest in a cheap torque wrench. And you'll need to use some emery cloth or sandpaper on the pivot to get it down to the proper diameter again before installing new brakes.

Last edited by Torchy McFlux; 06-11-10 at 03:15 AM.
Torchy McFlux is offline   Reply With Quote
Old 12-22-11, 05:06 PM   #3
sovereign
Junior Member
 
Join Date: Jun 2004
Location: Colorado
Bikes:
Posts: 20
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Similar dilemma, but with an apparently older design pivot sleeve. I assume that the area indicated in the pic below is a part of the pivot sleeve? So, to start, I need to razor knife the circumferance of the powder coat at the rear of this section? If anyone can tell me I am on the right track I appreciate it...

sovereign is offline   Reply With Quote
Old 12-22-11, 05:40 PM   #4
bikeman715
Senior Member
 
bikeman715's Avatar
 
Join Date: Mar 2008
Location: Salinas , Ca.
Bikes: Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others
Posts: 2,447
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
yes you on the right track ,then use the knife to remove what need or sand it down so the sleeve will fit over it.
bikeman715 is offline   Reply With Quote
Old 12-22-11, 06:14 PM   #5
sovereign
Junior Member
 
Join Date: Jun 2004
Location: Colorado
Bikes:
Posts: 20
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by bikeman715 View Post
yes you on the right track ,then use the knife to remove what need or sand it down so the sleeve will fit over it.
Perhaps I was not clear, but I am assuming that the area that I have circled and forward IS the pivot sleeve. I want to remove these in order to use a different brake. I am assuming that the portion in the pic that is circled is a part of the Paul Pivot Sleeve, and therefore that the powder coat needs to be cut first (thus breaking the seal that it would make) before I try to make them budge with vise grips, etc.
sovereign is offline   Reply With Quote
Old 12-22-11, 06:40 PM   #6
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Bikes: Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Posts: 18,301
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 415 Post(s)
Quote:
Originally Posted by mraceebb View Post
Need some repair help with something I haven't seen before. I was at a friends house helping him work on setting up his Miyata 1000 with some more modern parts. He had started putting on some paul touring cantis but it looked like the bike was originally made for 700's so they didn't quite reach right. He put them on about a month ago, has been super busy, and so today we went to take them off and put on some tektro cr720s.

When we took off the paul brakes, we found that the pivot sleeve was stuck on both of the canti-bosses. We tried pulling them off with hands, pliers and wrapped in a towel, and then just some pliers, but neither one would budge. There's also very little to grab. I did a google search but couldn't find anyone talking about something similar happening. It's just a sleeve, so I am surprised that it is so stuck on both sides. He said he's pretty sure he greased the posts (he's pretty good on that kinda stuff) and I imagine that the bosses and posts are steel, so seizing would be somewhat unlikely.

Anyone have any ideas on how to remove these. I am inlcuding a pic of the sleeves stuck on the bosses, and then one pic of what the sleeves look like when not on the bike.

Thanks in advance for any ideas.




It's probably not the Paul's brakes that are the problem. It's the pivots on the frame. I had a Miyata 610 that had the brakes stuck on them for ages. The pivot can mushroom if you tighten them too much. You might have luck with a bearing splitter if you can find one small enough.

__________________
Stuart Black
New! Pokin' around the Poconos A cold ride around Lake Erie
New! Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
An Good Ol' Fashion Appalachian Butt Whoopin'.
cyccommute is offline   Reply With Quote
Old 12-23-11, 01:41 AM   #7
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 22,176
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 1132 Post(s)
I expect Paul made those sleeves because the frame bosses are allover the map, in tolerances.

and someone jammed the sleeve over the boss with the pressing force of the fixing bolt,
rather than dressing the boss with a file, so it didn't take so much force.

+1 on potentially mushrooming the frame boss .

But worst case , Burn paint, take the boss' off the frame
and install new ones , then do a repaint.
fietsbob is online now   Reply With Quote
Old 01-14-12, 01:20 PM   #8
sovereign
Junior Member
 
Join Date: Jun 2004
Location: Colorado
Bikes:
Posts: 20
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
In the end, all it took was vice grips. After installation 11 years ago...

sovereign is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 03:09 PM.