Ground Control seatpost - I'm furious - Help!
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spacehopper
Senior Retro Guru
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@ beepbeep
utahdog2003
Senior Retro Guru
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PB Blaster
If the post is solid at the clamp, drill a small hole in the post and spray this stuff in the seat tube/post and then let her sit for a bit. Few Days maybe, reapply, and repeat.
http://blasterchemical.com/display.cfm?p=50003&pid=4
Then, mount the frame in a repair stand, such that the post is holding the bike to the stand, and orient the bike so that the frame is on it's side and pushing down on the headtube will apply a torsional force to the post. Finally, making sure that the stand is sturdy (you may need to weight it down to keep it from toppling, especially a folding type race stand), hang a heavy object from the headtube so that constant force is applied to twist the post out gradually, I like to use a concrete cinder block for the job, hanging from a padded bike security chain...protects the paint well.
Make sure the weight isn't far from the ground, because when the post breaks loose, you don't want to have the frame swing around in the stand so far that you prang it on something.
Sit back, wait about 3 days to a week, and BOING!...the post will pop loose. No need to pop a blood vessel in your skull twisting on the thing like a crazy man. Steel frames rust fast in Florida, and I've used this method on stuck posts many times and it almost always seems to work. Cutting out the post or resolving the matter to the vise always works too, but takes a hell of alot of work, and if you don't need the frame for a build right away, then let PB Blaster and gravity do the trick for you.
This method works for stuck bottom brackets too...just with some obvious variation in frame and weight placement, and tools.
PB Blaster is magical stuff.
If the post is solid at the clamp, drill a small hole in the post and spray this stuff in the seat tube/post and then let her sit for a bit. Few Days maybe, reapply, and repeat.
http://blasterchemical.com/display.cfm?p=50003&pid=4
Then, mount the frame in a repair stand, such that the post is holding the bike to the stand, and orient the bike so that the frame is on it's side and pushing down on the headtube will apply a torsional force to the post. Finally, making sure that the stand is sturdy (you may need to weight it down to keep it from toppling, especially a folding type race stand), hang a heavy object from the headtube so that constant force is applied to twist the post out gradually, I like to use a concrete cinder block for the job, hanging from a padded bike security chain...protects the paint well.
Make sure the weight isn't far from the ground, because when the post breaks loose, you don't want to have the frame swing around in the stand so far that you prang it on something.
Sit back, wait about 3 days to a week, and BOING!...the post will pop loose. No need to pop a blood vessel in your skull twisting on the thing like a crazy man. Steel frames rust fast in Florida, and I've used this method on stuck posts many times and it almost always seems to work. Cutting out the post or resolving the matter to the vise always works too, but takes a hell of alot of work, and if you don't need the frame for a build right away, then let PB Blaster and gravity do the trick for you.
This method works for stuck bottom brackets too...just with some obvious variation in frame and weight placement, and tools.
PB Blaster is magical stuff.
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longbeech":2cocai0f said:
Commonly called a pad saw, that's how I did it years ago on my Trek 930. needs patience and a quiet night in to do it but you will succeed in the end.
Raymond_mole
Retro Guru
In my past experience of getting seat posts out of frames.
This goes more so with ally ones. Because of the way they are made.
They have a fine thread turned into them almost unnoticable.
You can unscrew them.
Holding the seat post in a vice simply break the sealing pressure and then continue to twist until it comes out.
This goes more so with ally ones. Because of the way they are made.
They have a fine thread turned into them almost unnoticable.
You can unscrew them.
Holding the seat post in a vice simply break the sealing pressure and then continue to twist until it comes out.
Pickle,
leave some of the post sticking out of the frame... you will need to grab it with pliers etc... later.
Use a long hacksaw blade and make a number of cuts down the inside diameter of the post [be careful not to go too far and cut into the frame] Once you have enough cuts in it you can peel it inwards on itself with the pliers. It should collapse after you remove a couple of pieces from opposing sides.
Hope this helps.
Chaser.
leave some of the post sticking out of the frame... you will need to grab it with pliers etc... later.
Use a long hacksaw blade and make a number of cuts down the inside diameter of the post [be careful not to go too far and cut into the frame] Once you have enough cuts in it you can peel it inwards on itself with the pliers. It should collapse after you remove a couple of pieces from opposing sides.
Hope this helps.
Chaser.
Wold Ranger
Old School Grand Master
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Stuck
I've succeeded after a few days soaking with ordinary Diesel (this stuff will creep in anywhere!) than a sharp tap or 100, with a hammer back into the seat tube to start with, to break the bond, drill the seat post and insert a bar/long screwdriver and tap upwards and inwards alternately, much patience is needed and applying a little heat from a hair drier can help too!
The twist in a vice can be literally a make or break method! small steps small steps!!
I've succeeded after a few days soaking with ordinary Diesel (this stuff will creep in anywhere!) than a sharp tap or 100, with a hammer back into the seat tube to start with, to break the bond, drill the seat post and insert a bar/long screwdriver and tap upwards and inwards alternately, much patience is needed and applying a little heat from a hair drier can help too!
The twist in a vice can be literally a make or break method! small steps small steps!!
