Stuck seat post

[Tommy2]

lad at work has bought a bike off someone else, to be fair he got it cheap but the seat post is stuck, they’ve had a few goes at getting it out, any ideas?
It does look a mess now though, it’s an ally frame and I think an ally seat post although I’ve not really go involved.

 

[biggs682]

oh dear
Plenty of plus gas or other lubricating sprays
You could try some gentle warming up but be very careful
How much post is in the frame ?
if in doubt google johntheseatpostman
or try and cut strips in to the post and then peel it out can get messy

 

[Tommy2]

I think about 7 inches left in, they did go in all guns blazing rather than trying softly softly approach first!!!!

 

[CycleCommute.CC]

I had a carbon post stick in alu frame once. Had to cut it out piece by piece. Took hours of work but got there in the end. Alu post would be another matter though...

 

[Ajax Bay]

https://www.cyclechat.net/threads/p...sticking-in-a-steel-frame.174232/post-3528862

 

[Yellow Saddle]

Don't even bother with spraying stuff on it. It never works. Never. Follow the link above and be done with it.

 

[Tommy2]

They’ve cut down and tried to curl it in on itself but not all the way down, I think that’s what they need to do now.

 

[iluvmybike]

http://theseatpostman.com/

 

[biggs682]

I think about 7 inches left in, they did go in all guns blazing rather than trying softly softly approach first!!!!

That's a good length as they say

And good luck

 

[Tommy2]

I’ve had a look at seatpostman and to be honest he paid £50 for the bike it’s a Trek 1.5 with 10spd Tiagra so don’t know whether it’s worth the £60+ courier to get it repaired.

 

[Cycleops]

You're lucky that you've got a flange to work with. Try the usual things with lubrication and maybe put a cold chisel under that washer and knock it up with a hammer.
Otherwise try to hire a slide hammer.
Good luck

 

[Yellow Saddle]

Anyone who suggests lubrication as a solution needs to look at what causes alu seatposts to get stuck in frames.

 

[CXRAndy]

Galvanic corrosion. I had a lock bolt stuck inside a aluminium tow hitch. What a barsteward to get it out after only one winter. It will need cutting out I reckon

 

[Tommy2]

@Cycleops you should have seen them going at it with a slide hammer!!!! They actually broke the slide hammer and the weight went flying across the workshop! These guys are vehicle technicians too :\

 

[Gravity Aided]

May be time for lye.
My, that's a disgusting possibility.
What is the frame made of?