Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 28
  1. #1
    Senior Member
    Join Date
    Sep 2008
    Location
    Cambridge, UK
    My Bikes
    Specialized Allez (2007)
    Posts
    1,051
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Freeing a stuck bottom bracket

    I've got a not so very old steel Peugeot frame, problem is it has a cartridge BB seized in it. It's a welded frame, so I cant pour lube down the seat tube, but I've pulled the cable guides off and have been applying White Lightning Epic lube into the hole (it's really thin, and has lots of solvents, so I was hoping it would penetrate the threads), but so far no joy. I've got a feeling that rust is the problem here, and perhaps the mechanic was a prick and didn't bother to grease the threads. Does anybody have some suggestions how I can get this thing out? The BB is knackered btw, so leaving it in isn't an option.

  2. #2
    Senior Member Snordalisk's Avatar
    Join Date
    Nov 2003
    Location
    Worcester, MA
    My Bikes
    1977 Raleigh Professional, 1997 Milano 3v, 2004 Surly Karate Monkey, 2007 Surly Crosscheck, 1984 Hutch Pro Racer
    Posts
    129
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Your best bet is to get one of the shallower bottom bracket tools, like Shimano's TL-FC32, and rig up a bolt and washer to secure the tool to the bottom bracket itself. If it's a square taper BB, the bolt should be M8x1, and the washer should be big enough to fit over the tool, with a hole small enough to fit the bolt pretty securely. Pedro's also makes a tool for this: http://www.pedroscatalog.com/product...ductID=6460210.

    Once it's held on with the bolt, you can apply quite a bit of force without the tool slipping. Use a 12" or bigger adjustable wrench with a pipe slipped over the end of it if necessary. Make sure you're going the right direction first! If you can't get it out this way, you might have to find someone willing to take a torch to it. Good luck!

  3. #3
    Guest
    Join Date
    Jul 2008
    Location
    Grid Reference, SK
    My Bikes
    I never learned to ride a bike. It is my deepest shame.
    Posts
    3,769
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    +1 on making a tool to secure the tool to the spindle.

    Another strategy to use in concert with this is to remove most large sticky-outy parts (like wheels and handlebars) and, after your homemade tool has the spline tool held in place, secure the spline tool in a big bench vise and turn the frame.

    Remember that the right hand (drive side) of the bottom bracket is L.H. (reverse) thread.

  4. #4
    Senior Member TimJ's Avatar
    Join Date
    Sep 2005
    Posts
    1,917
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Those guys are right. Basically leverage is solution.
    fun facts: Psychopaths have trouble understanding abstract concepts.
    "Incompetent individuals, compared with their more competent peers, will dramatically overestimate their ability and performance relative to objective criteria."

  5. #5
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,618
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Snordalisk View Post
    Your best bet is to get one of the shallower bottom bracket tools, like Shimano's TL-FC32,
    Don't overlook this statement. Bottom brackets that won't succumb to a Park Tool tool come out super easy with Shimano's.

  6. #6
    Senior Member demoncyclist's Avatar
    Join Date
    Oct 2002
    Location
    Medway, MA
    My Bikes
    2011 Lynskey Sportive, 1988 Cannondale SM400
    Posts
    2,436
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Also try to get some PB Blaster in there. It eats the rust away. It has never failed me with stuck BBs or seatposts.
    DEMON

    Satanic Mechanic
    STAR 3 Spinning Instructor

    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

  7. #7
    Senior Member
    Join Date
    Jan 2009
    Location
    Oahu, HI
    My Bikes
    '94 DB Apex, '07 SBC Allez Elite
    Posts
    126
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Basil Moss View Post
    I've got a not so very old steel Peugeot frame, problem is it has a cartridge BB seized in it. It's a welded frame, so I cant pour lube down the seat tube, but I've pulled the cable guides off and have been applying White Lightning Epic lube into the hole (it's really thin, and has lots of solvents, so I was hoping it would penetrate the threads), but so far no joy. I've got a feeling that rust is the problem here, and perhaps the mechanic was a prick and didn't bother to grease the threads. Does anybody have some suggestions how I can get this thing out? The BB is knackered btw, so leaving it in isn't an option.
    Secure the tool to the spindle like stated. I reach through the front triangle or put the D-tube/H-tube junction on my shoulder and push down on the wrench/cheater bar.
    Epic lube sucks as a penetrant, try Bike-aid or Liquid wrench.
    http://www.lubritek.com/bike-aid_lube
    http://www.gunk.com/lubricants.asp

  8. #8
    motovation frankenmike's Avatar
    Join Date
    Jan 2007
    Location
    Dover, NH
    My Bikes
    rigid 29er moto, s-works stumpjumper fsr,black fixie,masi roadbike, ugly old hardrock commuter
    Posts
    1,253
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If the spindle is hollow, you can use a quick-release skewer to hold the tool in place. I've had success by carefully heating the bb shell, too.

  9. #9
    Junior Member
    Join Date
    Jan 2009
    Posts
    19
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was on an auto forum looking for help with a rusted stuck rotor and there were so many people that recommended PB Blaster I thought the company actually owned the forum site. I had tried heat, cold spray, everything. I was in the hardware store getting some big bolts and washers to make a tool to pry it off and happened to see a can of the stuff. It worked great and the rotors came off. I know this sounds like a bogus testimonial but it's true.

  10. #10
    Senior Member TimJ's Avatar
    Join Date
    Sep 2005
    Posts
    1,917
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Timbert View Post
    I was on an auto forum looking for help with a rusted stuck rotor and there were so many people that recommended PB Blaster I thought the company actually owned the forum site. I had tried heat, cold spray, everything. I was in the hardware store getting some big bolts and washers to make a tool to pry it off and happened to see a can of the stuff. It worked great and the rotors came off. I know this sounds like a bogus testimonial but it's true.
    It didn't until you said "I know this sounds like a bogus testimonial". Shill! (joke)
    fun facts: Psychopaths have trouble understanding abstract concepts.
    "Incompetent individuals, compared with their more competent peers, will dramatically overestimate their ability and performance relative to objective criteria."

  11. #11
    Senior Member
    Join Date
    Sep 2008
    Location
    Cambridge, UK
    My Bikes
    Specialized Allez (2007)
    Posts
    1,051
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    OK, what is this PB blaster of which you speak? I'll have to try some.

  12. #12
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rather than PB blaster you can also just get a little diesel fuel at the nearby gas station. When I last used that it:
    Looked like red dyed diesel,
    Smelled like diesel,
    Dissolved stuff like diesel, and
    Left the "I've been using petroleum fuel as a solvent with improper ventilation" headache.

    That said it is nice that it's in a spray can, but diesel fuel is probably cheaper, mix it with white gas (camp fuel) for a more accurate mix.

    The official MSDS states:
    Hazardous Ingredients CAS # Percent
    Alkloxypolyethylenioxyethanol 68131-40-8 0-3 %
    Solvent Naphtha, Heavy Aromatic** 64742-94-5 40-50%
    Heavy Petroleum Distillate 64742-65-0 20-30%
    Hydrotreated Light Distillate 64742-47-8 30-40%
    ACGIH (PEL)-500 ppm

  13. #13
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Basil Moss View Post
    OK, what is this PB blaster of which you speak? I'll have to try some.
    Don't get it in your eyes and be sure to work in a well ventilated area. (see my above post)


  14. #14
    Senior Member
    Join Date
    Sep 2008
    Location
    Cambridge, UK
    My Bikes
    Specialized Allez (2007)
    Posts
    1,051
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't think I've seen it before- can it be bought in the UK?

  15. #15
    GO BIG RED norwood's Avatar
    Join Date
    Nov 2008
    Location
    Hastings,NE
    My Bikes
    1996 Bianchi Veloce 1993 Bridgestone MB-3 1992 Trek 700 1992 Trek 820
    Posts
    678
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    All good advice. I know it was mentioned earlier but can't be stressed enough, make sure you're going the right direction. I had a BB stuck awhile back and I was positive that I was pulling in the right direction... but I wasn't.
    1996 Bianchi Veloce
    1993 Bridgestone MB-3
    1992 Trek 700
    1992 Trek 820

  16. #16
    Senior Member
    Join Date
    Apr 2005
    Location
    Malaysia
    My Bikes
    an old Marin
    Posts
    66
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    So... did you managed to get it out? I have managed to got a few stucked BBs judt by using a chisel & hammer.... and plenty of WD-40. One case took me a few hours once, I almost gave up. I did not just because it was a beautiful Bridgestone MTB frame....

  17. #17
    I have senior moments... bikinfool's Avatar
    Join Date
    Oct 2008
    Location
    Woodside, CA
    My Bikes
    Many
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just curious why a welded frame would prevent anything from going down the seat tube to the bb shell?
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
    Road bikes: TST, Trek 2300 (Carbon/Alum)

  18. #18
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bikinfool View Post
    Just curious why a welded frame would prevent anything from going down the seat tube to the bb shell?
    In a brazed/lugged frame the lugs aren't sealed at the end so you can get to the inside of the tubes from both ends. In a welded frame the BB is often sealed off or only has a weep hole.

  19. #19
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Basil Moss View Post
    I don't think I've seen it before- can it be bought in the UK?
    Auto parts stores have it here. If not, just mix some diesel fuel with some naptha/white gas/coleman fuel/zippo fluid/all the same.

  20. #20
    I have senior moments... bikinfool's Avatar
    Join Date
    Oct 2008
    Location
    Woodside, CA
    My Bikes
    Many
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Each of the welded frames I've had there was access, that's why I was wondering...guess I had unusual frames then?
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
    Road bikes: TST, Trek 2300 (Carbon/Alum)

  21. #21
    Senior Member
    Join Date
    Sep 2008
    Location
    Cambridge, UK
    My Bikes
    Specialized Allez (2007)
    Posts
    1,051
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Right, update. I got a can of Plusgas- apparently the best penetrating dismantling lube available in the UK. I've been squiring it in there, and given it some time. It says on the can that it usually works instantaneously, but in severe cases can take a few minutes. I've given it 15. I've taken all bits off the frame, so I can put my feet on the top tube. I've bolted the removal tool in place, and I'm starting with the left hand side, as that is sure to be anticlockwise to unscrew. I've also put a 2 foot long cheater bar on my spanner. And the ******* thing still won't budge.

    Any suggestions?

  22. #22
    Senior Member
    Join Date
    Dec 2004
    Posts
    166
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There comes a time when it things become undoable.

  23. #23
    Senior Member
    Join Date
    Sep 2008
    Location
    Cambridge, UK
    My Bikes
    Specialized Allez (2007)
    Posts
    1,051
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That isn't much help you know...

    What about heating it- anybody know how I'd go about doing that?

  24. #24
    WNG
    WNG is offline
    Spin Forest! Spin! WNG's Avatar
    Join Date
    Sep 2007
    Location
    Arrid Zone-a
    My Bikes
    I used to have many. And I Will again.
    Posts
    5,901
    Mentioned
    25 Post(s)
    Tagged
    0 Thread(s)
    heat the BB with a portable propane or MAP gas torch.
    If this doesn't work, dynamite.

    I had a hell of a time with a Shimano BB and an AL Diamondback frame. It was left submerged in water.
    Took a PB Blaster soaking overnight, followed by clamping a Park tool to the cup and and a super long breaker bar. Had to stomp on it with my right leg. But it finally loosened.
    Don't know why people insist on not using anti-seize compound for dissimilar metal contacts.
    “You meet the nicest people on two wheels!"
    "Learn from yesterday, live for today, hope for tomorrow." ~Albert Einstein

  25. #25
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Have you tried the local bike shop? I've seen them do some amazing things with stuck BBs around here.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •