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 04-22-14, 02:21 PM   #1
mathpants
Newbie
Thread Starter
 
Join Date: Apr 2014
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Help with Suntour Hidden Spring Brake

I have been working on an old centurion road bike. The Suntour GPX hidden-spring brakes were not returning well so I took apart the front brake. Now for the life of me I cannot get it back together with the springs. Does anyone have any guidance?
mathpants is offline   Reply With Quote
Old 04-22-14, 03:08 PM   #2
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 33,757
Mentioned: 78 Post(s)
Tagged: 1 Thread(s)
Quoted: 2657 Post(s)
Quote:
Originally Posted by mathpants View Post
I have been working on an old centurion road bike. The Suntour GPX hidden-spring brakes were not returning well so I took apart the front brake. Now for the life of me I cannot get it back together with the springs. Does anyone have any guidance?
Having done this job decades ago with a similar design Superbe Pro brake, my advice is going to be too late for you. Don't take these apart.

Yes, I got it working again, but sorry, it's been too long to remember what the trick was.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 04-22-14, 03:32 PM   #3
mathpants
Newbie
Thread Starter
 
Join Date: Apr 2014
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by FBinNY View Post
Having done this job decades ago with a similar design Superbe Pro brake, my advice is going to be too late for you. Don't take these apart.

Yes, I got it working again, but sorry, it's been too long to remember what the trick was.


Thank you, I managed to get it after struggling more. I wont take one of them apart again for sure. I would suggest that anyone who reads this leave them together as well.
mathpants is offline   Reply With Quote
Old 04-22-14, 04:23 PM   #4
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: velospace.org/viewcluster?c=873
Posts: 7,158
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Quote:
Originally Posted by mathpants View Post
I would suggest that anyone who reads this leave them together as well.
Unless they like a challenge
Kimmo is offline   Reply With Quote
Old 04-22-14, 05:35 PM   #5
hueyhoolihan
Senior Member
 
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Bikes: 8 ss bikes, 1 5-speed touring bike
Posts: 6,690
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(s)
i had the same problem with a rubic's cube.
hueyhoolihan is offline   Reply With Quote
Old 04-22-14, 09:32 PM   #6
Andrew R Stewart 
Andrew R Stewart
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder
Posts: 8,385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
My coworker took on a SRAM 11 speed RH shift pod problem yesterday. He opted to take it apart, as in levers off the shafts and more. He wished he had a couple of extra hands the size of a barbie doll's.

Being older then he is I saw the likely outcome last night. This morning he was still trying to reassemble the shift pod. Sometimes a man has to know his limitations. Andy.
Andrew R Stewart is offline   Reply With Quote
Old 04-24-14, 11:44 AM   #7
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: velospace.org/viewcluster?c=873
Posts: 7,158
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Quote:
Originally Posted by Andrew R Stewart View Post
This morning he was still trying to reassemble the shift pod. Sometimes a man has to know his limitations. Andy.
Stuff like that is mostly a matter of how much patience and persistence you can bring to bear... sometimes you have to wait for inspiration to strike, other times you just give it another crack and somehow pull it off without quite knowing why.
Kimmo is offline   Reply With Quote
Old 08-13-16, 04:28 PM   #8
cirp
Member
 
Join Date: Dec 2010
Location: San Clemente, CA
Bikes: Cannondale Caad6 R4000 si, Panasonic Team Custom, 2 Team Miyatas, Pro Miyata, Bridgestone RB1, Lotus Supreme, Lotus Cinelli Design Triomphe, Nishiki Tri-A, Unidentified 60's/70's road bike, Guerciotti, 1960 Schwinn Continental
Posts: 48
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Hello, mistakenly (is that a word?) to my front Superbe pro brake caliper apart and came across this old thread. Can you give me any tips on getting that spring back in? Thanks
cirp is offline   Reply With Quote
Old 08-14-16, 07:53 AM   #9
dedhed
SE Wis
 
dedhed's Avatar
 
Join Date: Apr 2005
Location: Milwaukee, WI
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400
Posts: 3,537
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Try posting in C & V as those guys often have original diagrams/instructions.

http://www.tearsforgears.com/2008/12...dia-compe.html

Last edited by dedhed; 08-14-16 at 08:02 AM.
dedhed is offline   Reply With Quote
Old 06-15-17, 06:59 AM   #10
canklecat
Me duelen las nalgas
 
canklecat's Avatar
 
Join Date: Aug 2015
Location: Texas
Bikes: Univega Via Carisma, Globe Carmel, Centurion Ironman Expert
Posts: 4,318
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 940 Post(s)
Late to this thread, but...

The front Suntour GPX brake on my 1989 Centurion Ironman Expert was misaligned slightly. The right caliper rubbed against the rim slightly even with the quick release opened. I didn't want to attempt to disassemble it to adjust the internal spring after reading threads like this one.

I noticed while moving the cables around on the handlebar to install mounts for my video camera and phone the front brake calipers would move. Since the brake was position sensitive to the cable I just zip tied the cable to the handlebar after tugging it to a more vertical position to minimize any curve.

Problem solved. Inelegant but effective.
canklecat is offline   Reply With Quote
Old 06-19-17, 09:00 AM   #11
cirp
Member
 
Join Date: Dec 2010
Location: San Clemente, CA
Bikes: Cannondale Caad6 R4000 si, Panasonic Team Custom, 2 Team Miyatas, Pro Miyata, Bridgestone RB1, Lotus Supreme, Lotus Cinelli Design Triomphe, Nishiki Tri-A, Unidentified 60's/70's road bike, Guerciotti, 1960 Schwinn Continental
Posts: 48
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Suntour Superbe internal spring installation

Since I haven't figured out how to get alerts about certain topics, I thought I would share how I finally got my Suntour brake caliper with the hidden spring back together. It was not by divine inspiration on my part, just a great suggestion from another forum member. I wrapped the inside brake arm then placed it in a vice. I made sure that one of the spring ends was in the anchor hole of the arm being held in place by the vice. I then installed the other brake arm, tightening it so that the opposite spring end was rubbing against the inside of the arm. I then twisted the free brake arm so that the spring end and the anchor hole would line up and snap into place. You really have to twist it quite a bit. After it snapped into place, I then tightened down the brake arm to the appropriate tension (not overly tight). Hope this helps others. Just message me if there are any questions.

Last edited by cirp; 06-19-17 at 09:04 AM.
cirp 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 03:19 PM.


 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION