Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Reply
 
Thread Tools Search this Thread
Old 07-28-07, 02:02 PM   #1
faronmd
Bike Overhauling Rookie
Thread Starter
 
faronmd's Avatar
 
Join Date: Jul 2007
Location: Nova Scotia Canada
Bikes:
Posts: 14
Crank arm Disassembly - WTF?

Hey all,

I am in the middle of overhauling a old mountain bike and I am down to the last disassemble - The 2 Crank arms from the chainring and frame. I have all the nuts I can find off the the crank arm ends but it still won't come apart. I thought maybe that the crankarm itself was screwed to the pin but I tried it without any luck. I even tried hammering. There is no sign of a screw holding it in place. I am stumped. Anyone have any insight?
faronmd is offline   Reply With Quote
Old 07-28-07, 02:07 PM   #2
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
Posts: 9,162
Crank arm puller
http://sheldonbrown.com/harris/tools...ket.html#crank
Bill Kapaun is offline   Reply With Quote
Old 07-28-07, 02:18 PM   #3
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Unless it's an emergency, don't even try to pull the cranks without the puller.
operator is offline   Reply With Quote
Old 07-28-07, 02:25 PM   #4
faronmd
Bike Overhauling Rookie
Thread Starter
 
faronmd's Avatar
 
Join Date: Jul 2007
Location: Nova Scotia Canada
Bikes:
Posts: 14
thanks all - something learned everyday.
faronmd is offline   Reply With Quote
Old 07-28-07, 02:59 PM   #5
faronmd
Bike Overhauling Rookie
Thread Starter
 
faronmd's Avatar
 
Join Date: Jul 2007
Location: Nova Scotia Canada
Bikes:
Posts: 14
Is there an alternative to the crank arm puller? I can't justify buying this tool for a one-time use.
faronmd is offline   Reply With Quote
Old 07-28-07, 03:04 PM   #6
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
Posts: 9,162
Quote:
Originally Posted by faronmd View Post
Is there an alternative to the crank arm puller? I can't justify buying this tool for a one-time use.
Do you want the bike to be usable?
Bill Kapaun is offline   Reply With Quote
Old 07-28-07, 03:08 PM   #7
genejockey
Klaatu..Verata..Necktie?
 
genejockey's Avatar
 
Join Date: May 2007
Location: SF Bay Area
Bikes: Battaglin MAX, Chorus kit; Bianchi 928 Veloce; Ritchey Road Logic, 7410 Dura Ace
Posts: 1,099
Take it to an LBS, and have THEM pull the cranks off.
genejockey is offline   Reply With Quote
Old 07-28-07, 03:10 PM   #8
faronmd
Bike Overhauling Rookie
Thread Starter
 
faronmd's Avatar
 
Join Date: Jul 2007
Location: Nova Scotia Canada
Bikes:
Posts: 14
a simple 'no' to my question would have sufficed.
faronmd is offline   Reply With Quote
Old 07-28-07, 03:46 PM   #9
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Quote:
Originally Posted by faronmd View Post
a simple 'no' to my question would have sufficed.
no

Guess I should've made my last post a bit more explicit. Crank puller is $10. Either that or find some sort of Bike recycle/community shop which allows you to use tools for a small fee.
operator is offline   Reply With Quote
Old 07-28-07, 08:20 PM   #10
BikingGrad80
that bike nut
 
BikingGrad80's Avatar
 
Join Date: Jul 2007
Location: Chicago north
Bikes: 2010 Motobecane Immortal Force 90' Trek 1400; 90' Trek 850; 06' Trek 520; 01 Iron Horse Victory
Posts: 883
I have heard that if you take the bike for a spin around the block with the nuts off and keep it in a low gear and don't apply much pressure to the pedals that the cranks should fall off and not be damaged. However, I'd still recommend getting the crank extractor.
BikingGrad80 is offline   Reply With Quote
Old 07-28-07, 08:43 PM   #11
Deanster04
Senior Member
 
Deanster04's Avatar
 
Join Date: Dec 2005
Location: Boulder, Colorado
Bikes: Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
Posts: 1,366
Quote:
Originally Posted by BikingGrad80 View Post
I have heard that if you take the bike for a spin around the block with the nuts off and keep it in a low gear and don't apply much pressure to the pedals that the cranks should fall off and not be damaged. However, I'd still recommend getting the crank extractor.
Not the best idea as you can distort the square taper if it comes off when you are applying a lot of pressure when it pops loose. Moreover, often if they over torqued the bolt during installation the riding method won't work easily. I agree with you just buy the tool.
Deanster04 is offline   Reply With Quote
Old 07-28-07, 08:45 PM   #12
faronmd
Bike Overhauling Rookie
Thread Starter
 
faronmd's Avatar
 
Join Date: Jul 2007
Location: Nova Scotia Canada
Bikes:
Posts: 14
Crank Puller it is. Thanks ALL!!!
faronmd is offline   Reply With Quote
Old 07-29-07, 12:47 PM   #13
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
BE SURE that the outside of the puller is FULLY seated in the crank or you'll strip out the threads. Back the inner part (plunger) all the way out before installing the puller.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 07-29-07, 05:51 PM   #14
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,687
Quote:
Originally Posted by BikingGrad80 View Post
I have heard that if you take the bike for a spin around the block with the nuts off and keep it in a low gear and don't apply much pressure to the pedals that the cranks should fall off and not be damaged. However, I'd still recommend getting the crank extractor.
This technique is normally used when the crank is to be discarded once it's off. It usually distorts the square hole in the crank arm enough that the crank never fits properly again even if you are careful.
HillRider is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 05:28 PM.