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 09-05-08, 12:17 PM   #1
Torellian
Senior Member
Thread Starter
 
Join Date: Jul 2005
Bikes:
Posts: 161
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Can't get seatpost unstuck!

The seatpost on my Specialized Hardrock is stuck real tight in position. I've only had this bike for a few years, and it's stuck real good. I had a bike for 12 years that had a stuck seatpost and I was able to free it with one application of WD40. But with this Hardrock, I've used WD40 repeatedly and it did no good. Then I took someone's advice and used Liquid Wrench repeatedly, and it hasn't helped either. I've even removed one of the accessory bolts from the seattube and turned the bike upside down and sprayed Liquid Wrench into it so that it get to the seattube from the inside. I've also taken off the seat and put a wood block on top of the post and whacked it really hard many times to try to break it free. Still no luck. Is there anything else that can be done. Would a bike shop even be able to fix this?
Torellian is offline   Reply With Quote
Old 09-05-08, 12:47 PM   #2
Novakane 
Senior Member
 
Novakane's Avatar
 
Join Date: Aug 2006
Location: Canada's Capital
Bikes: Sekine RM40 1980, Miyata 1000LT 1990, Raleigh Mixte Sprite 1980, Raleigh Grand Prix 1979
Posts: 556
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Search the forums for stuck seat posts - you'll find a wealth of info.
Novakane is offline   Reply With Quote
Old 09-05-08, 01:10 PM   #3
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: 2,436
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
try ammonia instead of WD-40, we are talking about a aluminum frame here ,aren't we ? IF we aren't it can take a long time for wd-40 or liquid wrench to work. try puting the post in a vise and try pulling on the frame and over time it should come out.if you are in a hurry then you need to cut the post 1"above the frame and use a hacksaw blade to cut the post in half or 1/3 and use a tool to knot it out.just don't cut into the frame.
bikeman715 is offline   Reply With Quote
Old 09-05-08, 10:39 PM   #4
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
PB-Blaster works WAY WAY better than liquid-wrench.
DannoXYZ is offline   Reply With Quote
Old 09-06-08, 11:03 AM   #5
Torellian
Senior Member
Thread Starter
 
Join Date: Jul 2005
Bikes:
Posts: 161
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thank you all for the help! Actually, this bike is Chro-moly. That's what the frame material is. I don't know the material of the seatpost.
Torellian is offline   Reply With Quote
Old 09-06-08, 11:33 AM   #6
jimbooth
Junior Member
 
jimbooth's Avatar
 
Join Date: Aug 2008
Location: York, PA
Bikes: Cannondale KV900 & Raven, Fuji cross, Bianchi cross/touring, Kestral 200, KHS montana setup for touring, dirt research
Posts: 21
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The ammonia will still help, it's probably corrosion set up between two dissimilar metals - the alum seat post and the steel tube.
jimbooth is offline   Reply With Quote
Old 09-06-08, 11:42 AM   #7
Mondoman
Senior Member
 
Join Date: Apr 2008
Location: A Latvian in Seattle
Bikes:
Posts: 1,020
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It would probably be a good idea to figure out what material the seat post is made of (aluminum or steel) before applying things like ammonia. Seeing if a magnet will stick or looking up the bike in bikepedia.com are at least two options.
Mondoman is offline   Reply With Quote
Old 09-06-08, 01:41 PM   #8
JoebikerLa
Selfish bitter clinger.
 
Join Date: Aug 2006
Location: Red Stick
Bikes: Surly 1x1 commuter, Specialized Epic, Litespeed Ultimate, Nishiki Sport, Trek zx6000, Fisher Sugar team issue, Surly Big Dummy, 1984 Trek 400, Trek 820, kabuki road bike.
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have also used a pipe wrench on a stuck aluminum post in a steel frame to twist it out. I got it out but the post was damaged. Regular checks and greasing is done now.
JoebikerLa is offline   Reply With Quote
Old 09-06-08, 09:15 PM   #9
illwafer
)) <> ((
 
illwafer's Avatar
 
Join Date: Mar 2008
Location: San Diego, CA
Bikes:
Posts: 2,398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you will probably need to cut it with a hacksaw. i did this for one of my bikes. the previous owner must have sweat all over the place and that created a crazy bond that nothing could penetrate.

it is not hard to do, it just takes a while and is very tiring. cut down the length of the seat tube until you get to the frame. then take a pliers and try bending the post in on itself. if it still sticks, cut another slit...and another and another until you get it all out. i probably cut like 8 slits to get mine out.
illwafer is offline   Reply With Quote
Old 09-07-08, 12:07 PM   #10
Torellian
Senior Member
Thread Starter
 
Join Date: Jul 2005
Bikes:
Posts: 161
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by Mondoman View Post
It would probably be a good idea to figure out what material the seat post is made of (aluminum or steel) before applying things like ammonia. Seeing if a magnet will stick or looking up the bike in bikepedia.com are at least two options.
I put a magnet up the the seatpost last night. It didn't stick, so I guess it's not steel. I also had taken the seat off the post to make it easier to work on. Now the seat is back on, but it tilts forward and causes me to keep slipping forward when I ride. Is there a way to adjust this?
Torellian is offline   Reply With Quote
Old 09-07-08, 12:37 PM   #11
Mondoman
Senior Member
 
Join Date: Apr 2008
Location: A Latvian in Seattle
Bikes:
Posts: 1,020
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Loosening the seat mounting bolt or bolts should allow you to adjust the tilt of the seat, as well as its front/back position.
Mondoman is offline   Reply With Quote
Old 09-07-08, 12:47 PM   #12
Torellian
Senior Member
Thread Starter
 
Join Date: Jul 2005
Bikes:
Posts: 161
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by Mondoman View Post
Loosening the seat mounting bolt or bolts should allow you to adjust the tilt of the seat, as well as its front/back position.
There seems to be only one mounting bot, and it's located in back of the seatpost. When I loosen it, it allows me to move the seat forward and backward, but doesn't allow me to adjust the tilt.
Torellian is offline   Reply With Quote
Old 09-08-08, 12:16 PM   #13
Torellian
Senior Member
Thread Starter
 
Join Date: Jul 2005
Bikes:
Posts: 161
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I found out how to do it. There's an elongated hole in the seat bracket that's in contact with the seatpost. I can move it forward and back before tightening the seatbolt to adjust the tilt.
Torellian is offline   Reply With Quote
Old 09-08-08, 12:41 PM   #14
G piny parnas
messenger
 
Join Date: Aug 2008
Location: WLA
Bikes: pinarellos and a colnago
Posts: 599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yo

don't destroy your bottom bracket with all those chemicals--- also, be patient--- it takes a few days sometimes to let all that stuff do its job-- dont build a pipe bomb---
G piny parnas 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 07:17 PM.