Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Help to remove broken crank for a novice

Notices
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.

Help to remove broken crank for a novice

Old 08-09-21, 10:15 AM
  #1  
bikefun12
Junior Member
Thread Starter
 
Join Date: Aug 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Help to remove broken crank for a novice

I am trying to update my child's old bike to an electric bike for a trip.
I bought a crank remover this did not work so I used a disk to remove the pedal
please lock at the pictures how do I remove the crank, please.

I really appreciate your HELP.

Thank you ALL.
Attached Files
File Type: pdf
2021-08-09_19-05-47.pdf (1.14 MB, 41 views)
bikefun12 is offline  
Old 08-09-21, 10:22 AM
  #2  
ClydeClydeson
Senior Member
 
Join Date: Mar 2019
Posts: 1,428
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 488 Post(s)
Liked 751 Times in 436 Posts
The correct tool to get the crank bolt out is an 8mm hex wrench (allen key).

Now you need a bottom bracket spline tool. This will engage the splines of the cup holding the bottom bracket (shaft and bearings) in the frame. then you need to remove the other crank arm (this time with an 8mm allen key to remove the bolt and crank puller to pull the arm off the spindle. An angle grinder is not the correct tool) and remove the cup from the other side.

NB the left cup that you already have access to is RH threads, so normal counter-clockwise to remove, and the right side (drive side) has reverse threads, so is clockwise to remove.
ClydeClydeson is offline  
Old 08-09-21, 10:26 AM
  #3  
bikefun12
Junior Member
Thread Starter
 
Join Date: Aug 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Thank you, for your fast reaponse this really helps.
bikefun12 is offline  
Old 08-09-21, 12:28 PM
  #4  
squirtdad
Senior Member
 
squirtdad's Avatar
 
Join Date: Jul 2006
Location: San Jose (Willow Glen) Ca
Posts: 8,641

Bikes: 85 team Miyata (modern 5800 105) , '84 Team Miyata,(dura ace old school) 80?? SR Semi-Pro 600 Arabesque

Mentioned: 91 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,469 Times in 892 Posts
I think if the first tool you reach for is a cut off disk, you probably should not be doing any wrenching on bikes. And asking about what tool to use for a hex bolt also suggests the same.

at this point you have destroyed the spindle and will at minimum need to replace You need to remove the drive side crank, and then the bottom bracket as noted earlier. then figure our your replacements
__________________
Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light 56,57 or so)

squirtdad is offline  
Likes For squirtdad:
Old 08-09-21, 04:45 PM
  #5  
csport
Senior Member
 
Join Date: Sep 2015
Location: /dev/null
Posts: 553

Bikes: Soma Double Cross Disc (2018)

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 185 Post(s)
Liked 82 Times in 53 Posts
Links to some of the mentioned tools:
hex wrench -- obvious
https://www.parktool.com/product/uni...d-cranks-cwp-7 -- crank puller
https://www.parktool.com/blog/repair...#BBT-22-BBT-32 -- bottom bracket remover
These are made by Park Tools, there exist cheaper ones which are compatible with the standard.
csport is offline  
Old 08-09-21, 11:37 PM
  #6  
bikefun12
Junior Member
Thread Starter
 
Join Date: Aug 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Everything fixed fun to learn new skills in life thank you for your help appreciate supper happy.
bikefun12 is offline  
Old 08-09-21, 11:38 PM
  #7  
bikefun12
Junior Member
Thread Starter
 
Join Date: Aug 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Thanks for your response all is fixed and working removed successfully with the correct tools.
bikefun12 is offline  
Likes For bikefun12:
Old 08-09-21, 11:40 PM
  #8  
bikefun12
Junior Member
Thread Starter
 
Join Date: Aug 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Thank you for your support.
bikefun12 is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.