Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11
  1. #1
    Waiting to commute... Amoxicillin's Avatar
    Join Date
    Aug 2007
    Location
    Basel, Switzerland
    My Bikes
    Number of bikes changing ...
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Oooold steel frame with crank prob

    Fellow bike mates,
    it was just two days ago when i found this lovely steel frame attached to some garbage at a garage sale. It is a grey Mercier (french, at the time the main competition to Peugeot bikes, I guess back in the 70s and 80s). You know the type with a partial chrome plated fork, lugs and tubes brazed together, no welds. To cut a long story short: My new to-be-refurbished-and-converted-to-singlespeed-frame...

    Stripped it down neatly and kept some parts as they were really nicely done with a love for the detail such as the brakes, the pump holder, ... had some problems removing the headset though.

    Now the problems remains with the cranks which gave me some hard time. I got loose the locking nuts but the cranks are still fastend with what is called by Barnett's bicycle manual a "cottered crank pin". It seems the guy that owned the bike before he put it on the pile of junk where I found it must have ridden the bike with the cotter pins loose and the crank arms dangling back and forth with every revolution. The pins ar now nicely bent out of shape and curved it seems. Barnett recommends plenty of oil and praying and some tool I don't have nor want to buy. Has anyone had a similar problem and found a way to solve it other than Barnett? I already tried a big fat hammer...

    Would be grateful for any help on this guys!!

    Amox
    Think of bicycles as rideable art that can just about save the world. Imagine, they can even have cupholders...

  2. #2
    Waiting to commute... Amoxicillin's Avatar
    Join Date
    Aug 2007
    Location
    Basel, Switzerland
    My Bikes
    Number of bikes changing ...
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sorry was too focussed on the problem before looking up the problem in the forum ...

    Crank Cotter Removal

    Never mind.
    Think of bicycles as rideable art that can just about save the world. Imagine, they can even have cupholders...

  3. #3
    EATS
    Join Date
    Nov 2007
    Location
    East Aurora NY, 20 miles SE of Buffalo
    My Bikes
    We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid
    Posts
    162
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The cotter pins are very soft and easy to drill through. Start with a small drill and drill the length of the cotter pin. Go up in size until you've removed as much of the pin as you can. If the crank arms are junk then drill big and don't worry about damaging them further. I had a Mercier back in the mid 70's and wish I still owned it.

  4. #4
    Senior Member
    Join Date
    Jan 2006
    Location
    Tucson, AZ
    Posts
    771
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Hey, we didn't mind it at all. There's no such thing as a stupid question. Steel is real. And old is Gold. Just make sure you post some pics of this gem when you get it done. I'd love to see it!

  5. #5
    Your mom
    Join Date
    Aug 2006
    Posts
    2,547
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Cottered cranks are no fun. Good luck. Sheldon describes his hammer method. I've used that; never drilled.

  6. #6
    Waiting to commute... Amoxicillin's Avatar
    Join Date
    Aug 2007
    Location
    Basel, Switzerland
    My Bikes
    Number of bikes changing ...
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Ha haaaaaaaaaaaaa!!! Hammering seems to be to hard on the bottom bracket itself... wouldn't do it. So I asked around in a couple of bike shops in the area and in one the owner came up with an antique tool (i mean antique) that was designated for just that task. Hard to decribe that thing. Looked like a bolt cutter, but shorter and instead of the blades it had a system to push the pins in or out, as you wished. Out was my joice, the first one popped right out, the other was a real b****. 10 min working back and forth but in the end he gave up on a sharp blow from a hammer-backed center punch. So: They're out!! YEEEEE-HAAAAA!! Dentists must feel the same after a tooth extraction ...

    Now... which way to turn the cup? RH or LH? Fun never ends...

    Keeping you posted...

    Later
    Think of bicycles as rideable art that can just about save the world. Imagine, they can even have cupholders...

  7. #7
    Senior Member bikeman715's Avatar
    Join Date
    Mar 2008
    Location
    Salinas , Ca.
    My Bikes
    Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others
    Posts
    2,080
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    the drive side (rightside ) come out clockwise and the non drive side (left side ) come out counterclockwise . good luck .

  8. #8
    EATS
    Join Date
    Nov 2007
    Location
    East Aurora NY, 20 miles SE of Buffalo
    My Bikes
    We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid
    Posts
    162
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What Bikeman715 wrote is not correct for your machine. Older French bikes like your Mercier have 35mm x 1mm RIGHT HAND threading on both sides of the bottom bracket.

  9. #9
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,514
    Mentioned
    16 Post(s)
    Tagged
    0 Thread(s)
    I just ordered one of these:

    http://bikesmithdesign.com/CotterPress/index.html

    That was a VAR cotter press that Amoxocillan was talking about. I haven't seen one of those in 20 years.
    Last edited by Grand Bois; 05-28-08 at 09:09 PM.

  10. #10
    Your mom
    Join Date
    Aug 2006
    Posts
    2,547
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, it's gorgeous, but pricey for a limited-use tool.

  11. #11
    Waiting to commute... Amoxicillin's Avatar
    Join Date
    Aug 2007
    Location
    Basel, Switzerland
    My Bikes
    Number of bikes changing ...
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No it's not the one i was talking about but I wanted to get one at the local bike shop supplier... was told 1 month of delivery... but i will consider getting one of these. The other was too heavy and awkward to handle, there is a picture here, it is #7 http://www.sheldonbrown.com/var/pages/var0012.html

    Re johnlyons53's comment: the threads, yes I believe it is RH on both sides. Thanks!
    Think of bicycles as rideable art that can just about save the world. Imagine, they can even have cupholders...

Posting Permissions

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