gfxgfx
 
logo
 
gfx gfx
gfx
975793 Posts in 138943 Topics by 6363 Members - Latest Member: Bmxflex November 13, 2024, 12:29 PM
*
gfx* Home | Portal | Forum | Merchandise | Help | Login | Register | gfx
gfx
RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Supergoose Seatpost Problem - A BIG ONE
gfx
gfxgfx
 

Author Topic: Supergoose Seatpost Problem - A BIG ONE  (Read 12060 times)

0 Members and 1 Guest are viewing this topic.

750Rush

  • Guest
Supergoose Seatpost Problem - A BIG ONE
« on: March 17, 2012, 02:27 PM »
Well, I thought it felt slightly heavy when I bought it, but now I know why.

After filling the seatpost with coca-cola and letting it sit for the morning, I attahed the stem to it, them the forks to the stem and with some more WD40 had a good old twist (it was very stiff) this is what I found:











Nothing like a big iron rod to make a super light race bike  :-\

So much for what I thought would be a nice blue rental seat post too.

The seat post was twisting off the iron bar. I've tried to twist the iron bar out with some molegrips on it, but it won't shift. My question is, how the heck is it stuck in? I know there is a small crack on the frame where the seatpost inserts, but wouldn't it have been easier to weld that back up?

Any help or advice would be much appreciated as I have already paid far too much for this bike as it had a cracked rear tuff and now this  :-[


« Last Edit: March 17, 2012, 02:29 PM by 750Rush »

Offline Bob_Acid

  • Team Admin
  • BMX Overlord
  • *
  • Posts: 17364
  • It's Bronked
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #1 on: March 17, 2012, 02:35 PM »
I would hazard a guess that you have a seat post stuck in there and someone has hammered the bar down into it to hold the post on the top

750Rush

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #2 on: March 17, 2012, 02:40 PM »
How do I get it all out?

Offline sawzall

  • 540 Air
  • *******
  • Posts: 2793
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #3 on: March 17, 2012, 02:51 PM »
you could try welding a bar on top of post forming a "T" then put it in a vice and try turning it :daumenhoch:
British race frames and race clothing wanted

Offline rooski

  • 540 Air
  • *******
  • Posts: 2616
  • Mons Veneris
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #4 on: March 17, 2012, 02:57 PM »
You need to get a big slide hammer,

Drill and tap the end of the bar,screw a bolt in there,and attach it to the slide hammer :daumenhoch:

get someone to hold the frame and get hammering :daumenhoch:

looks like this


Offline steve69

  • Flip-Whip
  • ******
  • Posts: 1972
  • aka. Steve Changa
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #5 on: March 17, 2012, 03:02 PM »
flip it over and stick the rod in a bench vise, do it up FT and give the frame a twist, and/or caustic the rest out  :-\
If there's air in the tyres... it's a rider

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #6 on: March 17, 2012, 03:30 PM »
I might suggest some thing else before you try that lot - right see if this makes sense


The original owner has a renthal seat post but wants to take it out - snaps it off down in the seat tube - some clever bloke says you never get it out, but if we get another seat post the same, we can then cut it down and stick a rod of metal between the two to join them together ~ with enough new seat post down the seat tube it will stay they as the metal rod is holding both in - lock it down with a seat clamp and hey presto your ready to go !

i would suggest trying the caustic soda route

i had a renthal post stuck and they do seem to weld/bond them selfs in well - take a little while to do but might be the best way and not twist the frame in any way


if the bottom bit of seat tube is renthal, then it might melt out and the iron rod will brake/drop out and you will then have a clear empty seat tube to use

it's just a thought before you twist the frame or try to drill out ?

what do you lot think ?

cheers B  ;)
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

Offline rick1970

  • Look Back
  • *****
  • Posts: 1742
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #7 on: March 17, 2012, 05:48 PM »
JESUS  :shocked:  ive seen a few stuck post threads but that is the worst by far   :wtf:  good luck mate hope you get it sorted  :daumenhoch:

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #8 on: March 17, 2012, 06:06 PM »
they do come out - in the end  ;D 



The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

h2ggv

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #9 on: March 17, 2012, 06:06 PM »
It's ok getting the metal bar out but then how do you get the rest of the old seat post out :-\

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #10 on: March 17, 2012, 06:27 PM »
the causic sode eats the alloy metal and dissolves it - it just turns to a mush that you have to wash out ever so oftern and put some more stuff in with hot water - in the end it's all gone

takes time, but is a good way if you are not sure that you don't want to damage it or know how to drill it out !
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

h2ggv

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #11 on: March 17, 2012, 06:36 PM »
the causic sode eats the alloy metal and dissolves it - it just turns to a mush that you have to wash out ever so oftern and put some more stuff in with hot water - in the end it's all gone

takes time, but is a good way if you are not sure that you don't want to damage it or know how to drill it out !

 That's the only way then or a machine shop to drill it out

750Rush

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #12 on: March 17, 2012, 08:17 PM »
I've just got back in. Many thansk for the advice. Where can you but caustic soda from, B&Q?

Will it damage the chrome if it spills?

I suppose the tube will need re-chroming anyway once I can find someone to weld it?

Sorry for all the questions!

dan-dare

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #13 on: March 17, 2012, 08:24 PM »
Caustic will only damage non-ferrous metals... :daumenhoch:

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #14 on: March 17, 2012, 08:28 PM »
should be ok on chrome - but as you say re-chrome or a paint will be on the cards

you can get it on ebay - maybe ask other members which they like best

does take a bit of time - but works
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

Offline Discostu

  • 540 Air
  • *******
  • Posts: 2757
  • Two's Company
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #15 on: March 17, 2012, 08:36 PM »
Yeah good advise bendy. Caustic soda mixed up strong. Remember to be gloved up etc and away from kids as it is nasty stuff. You will need to do it in a well ventilated area as well. Be patient and the alloy post will break up leaving you with the steel rod which be loose.  :daumenhoch:

750Rush

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #16 on: March 17, 2012, 09:23 PM »
Many thanks everyone. Some project this is turning out to be  :2funny:

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #17 on: March 17, 2012, 10:36 PM »
wouldn't be as fun if it was too easy  >:D ;)
« Last Edit: March 20, 2012, 06:59 PM by BENDYCAT ELEVENTEEN »
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

Clean

  • Guest
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #18 on: March 17, 2012, 10:38 PM »
Yeah good advise bendy. Caustic soda mixed up strong. Remember to be gloved up etc and away from kids as it is nasty stuff. You will need to do it in a well ventilated area as well. Be patient and the alloy post will break up leaving you with the steel rod which be loose.  :daumenhoch:

Caustic ain't gonna eat up a solid iron / mild steel bar anytime in the next 20 years, surely?  :shocked:

Alien blood is what you need!  :daumenhoch:

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #19 on: March 17, 2012, 10:48 PM »
glen sorry Rich  ;D if the iron rod is in the rethal alloy post at the bootom of the seat post tube, it will come out easy  ;)
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

750Rush

  • Guest

Offline animal

  • Team Moderator
  • BMX Nerd
  • *
  • Posts: 4627
  • MRD Loony & proud
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #21 on: March 20, 2012, 04:55 PM »
Yes thats the stuff  :daumenhoch: Definately go for dissolving the ally seatpost from around the bar and seatpost tube  ;) Use wam water 4 the caustic and do it where u can keep it walm if u can  ;) I use a blow torch 2 reheat mine when its gone cold . This will b slowly slowly catchy money time tho  ::) Don't expect it 2 work in minutes. wash out the mixture after a day and refill etc .

Offline Pooch

  • Tail Whip
  • **********
  • Posts: 5136
  • funny you should say that..
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #22 on: March 20, 2012, 08:15 PM »
Took about 3days or so for mine to dissolve .. Worked really well :daumenhoch:
Griff loves BUM..

Offline Bob_Acid

  • Team Admin
  • BMX Overlord
  • *
  • Posts: 17364
  • It's Bronked
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #23 on: March 21, 2012, 09:15 AM »
is the post that's stuck in there definitely alloy and not steel?

Offline BENDYCAT ELEVENTEEN

  • Berm Worm
  • ***********
  • Posts: 7327
  • "Click here for link"
  • Rated:
Re: Supergoose Seatpost Problem - A BIG ONE
« Reply #24 on: March 21, 2012, 09:45 AM »
Find in a couple of years when it's not shifting that much  ;D
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Supergoose Seatpost Problem - A BIG ONE
 

gfxgfx
gfx gfx
Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
SimplePortal 2.3.5 © 2008-2012, SimplePortal