Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

fork binding in steer tube

Notices
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.

fork binding in steer tube

Old 02-27-17, 10:14 AM
  #1  
capnjonny 
Senior Member
Thread Starter
 
capnjonny's Avatar
 
Join Date: Nov 2014
Location: Saratoga calif.
Posts: 920

Bikes: Miyata 610(66cm), GT Vantara Hybrid (64cm), Nishiki International (64cm), Peugeot rat rod (62 cm), Trek 800 Burning Man helicopter bike, Bob Jackson frame (to be restored?) plus a never ending stream of neglected waifs from the Bike exchange.

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Likes: 0
Liked 326 Times in 141 Posts
fork binding in steer tube

I brought another Raleigh Supercourse home from the bike exchange this weekend to clean up for sale and am having a problem with the head set bearings.

I removed the fork, cleaned the bearing races, replaced the loose bearings ( leaving one out both top and bottom) and re assembled everything.

When I adjusted the top nut to take out the play in the bearings I noticed that when the fork was rotated one way it would bind slightly. Turning it the other way there was no binding ( I was not turning it 360 deg as there is a cable stop on the fork which hits the frame if you turn it too much).

I also noted that when the front wheel was put into the fork it didn't align perfectly with the frame , being about 1/8" off center to the right looking from front to back.

I pulled on the fork blades a little and got the wheel to center in the fork and align properly but the dragging in the bearings worries me.

I did a close inspection of the frame and couldn't see any telltale signs of an impact. I also looked at the bearing race on the fork and it looks like it is seated properly.

What am I missing?

I think the bike will be rideable as is as a donation bike but I was hoping to put it in our big sale next week along side the other Super Course I just fixed up and and I can't let it go the way it is.
capnjonny is offline  
Old 02-27-17, 10:26 AM
  #2  
thumpism 
Bikes are okay, I guess.
 
thumpism's Avatar
 
Join Date: Jan 2015
Location: Richmond, Virginia
Posts: 8,458

Bikes: Waterford Paramount Touring, Giant CFM-2, Raleigh Sports 3-speeds in M23 & L23, Schwinn Cimarron oddball build, Marin Palisades Trail dropbar conversion, Nishiki Cresta GT

Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 2441 Post(s)
Liked 1,708 Times in 1,174 Posts
Pull the fork and look inside the head tube. It was not uncommon in the old days to have frame tubes poking into spaces where they had no business being and you might find this to be the case. I had a Peugeot with a seat tube that extended 1/4" into the BB shell. It was no problem until I wanted to install a plastic sleeve or, later, a cartridge bottom bracket.
thumpism is offline  
Old 02-27-17, 10:49 AM
  #3  
SkyDog75
Senior Member
 
Join Date: May 2011
Location: Upstate NY
Posts: 3,794

Bikes: Bianchi San Mateo and a few others

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 634 Post(s)
Likes: 0
Liked 13 Times in 9 Posts
Another possibility: Maybe the head tube faces aren't faced perfectly and aren't square with one another?
SkyDog75 is offline  
Old 02-27-17, 11:39 AM
  #4  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,075

Bikes: Several, mostly not name brands.

Mentioned: 147 Post(s)
Tagged: 0 Thread(s)
Quoted: 3194 Post(s)
Liked 2,503 Times in 1,471 Posts
Originally Posted by capnjonny View Post
When I adjusted the top nut to take out the play in the bearings I noticed that when the fork was rotated one way it would bind slightly. Turning it the other way there was no binding []

I did a close inspection of the frame and couldn't see any telltale signs of an impact. I also looked at the bearing race on the fork and it looks like it is seated properly.
This is a classic sign of the bearings not being in alignment. If the cups and crown race are seated fully, then the problem is most likely that the head tube and/or fork crown race seat need to be milled. This requires expensive tools, so most likely done at your LBS.
JohnDThompson is offline  
Old 02-27-17, 09:02 PM
  #5  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 16,952

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3722 Post(s)
Liked 2,764 Times in 1,720 Posts
Agreed with the bearings not being is parallel planes as a likely cause, although the Raleigh type headsets are very sensitive to proper ball counts. Very much so.


One work around without being able to machine the cup and crown seats is to replace the lower stack of the headset with a more common, less radial contact, cup and cone set. The more angular ball contact of the common loose ball headsets (other then the English/Raleigh types) is more forgiving of miss aligned seats. I have done this with a few headsets over the years.


Of course we trust hat the steerer's straightness has been established first. Andy
Andrew R Stewart is offline  
Old 02-28-17, 02:25 AM
  #6  
Bike tinker man
Senior Member
 
Join Date: Dec 2014
Location: Retired to Penang Malaysia originally from UK
Posts: 344

Bikes: My 1978 Raleigh from new, 1995 Trek, & constant changing & rebuilding of other bike projects.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Originally Posted by Andrew R Stewart View Post
Of course we trust hat the steerer's straightness has been established first. Andy
Fully agree very slightly bent steerer tube, or at the fork crown area, it only needs to be a few thou' over that length.
Bike tinker man is offline  
Old 02-28-17, 08:45 PM
  #7  
Slash5
Senior Member
 
Join Date: Feb 2014
Location: Southern Ontario
Posts: 1,891
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 263 Post(s)
Likes: 0
Liked 8 Times in 7 Posts
I'd try taking one more bearing out of the races.
Slash5 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mathews023
Bicycle Mechanics
5
11-26-18 12:09 PM
Jen34
Classic & Vintage
6
11-21-17 12:14 PM
trek330
Bicycle Mechanics
3
04-16-15 11:09 AM
bulldogs2k
Bicycle Mechanics
6
08-13-12 11:42 AM
Stefan.
Road Cycling
2
01-17-11 09:07 AM

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 or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.