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

Derailleur Pulley Bolt

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.

Derailleur Pulley Bolt

Old 06-14-22, 06:00 AM
  #1  
Gummomarx
Member
Thread Starter
 
Join Date: Aug 2015
Posts: 47

Bikes: Juliusseive

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 5 Times in 4 Posts
Derailleur Pulley Bolt

Sadly, on trying to replace a pulley, the bolt head is stripped. Any tips on how to get it off?

Also, I'll need to buy a new bolt but I'm unsure, while searching online, what will be compatible with my Shimano RD-M663 derailleur.


Last edited by Gummomarx; 06-14-22 at 06:12 AM.
Gummomarx is offline  
Old 06-14-22, 01:50 PM
  #2  
frankenmike 
mechanically sound
 
frankenmike's Avatar
 
Join Date: Jan 2007
Location: Dover, NH
Posts: 1,582

Bikes: Indy Fab steel deluxe, Aventon cordoba, S-works stumpy fsr, Masi vincere, Dahon mu uno, Outcast 29 commuter

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 78 Post(s)
Liked 52 Times in 39 Posts
File or dremel screwdriver slots into the bolt head.
__________________
frankenmike is offline  
Likes For frankenmike:
Old 06-14-22, 02:29 PM
  #3  
Crankycrank
Senior Member
 
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,111
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 666 Post(s)
Liked 658 Times in 498 Posts
+1 ^^^.
-Tapping a torx bit into the hole may have enough grip to turn it,
-Bolt/Screw extractors Screw Extractors - Ace Hardware
-Remove the other pully bolt and try to rotate the cage halves in opposite directions which may loosen the bolt a bit,
-Drill off the head of the bolt and you'll have a long enough stud left over to grab with pliers.

EV-RD-M663-3043A.xls (shimano.com) Gives you the part number (#10 or 11 in the diagram) to do a search for a replacement or go to your local bike shop.

Last edited by Crankycrank; 06-14-22 at 02:37 PM.
Crankycrank is offline  
Likes For Crankycrank:
Old 06-14-22, 06:07 PM
  #4  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 16,624

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Srewart 650B ATB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3590 Post(s)
Liked 2,474 Times in 1,562 Posts
These small bolts and such are often sourced from damaged or old units sitting in the LBS or local bike recycler's "not yet tossed out" boxes. Also know that many small bits are shared across several grades of ders. Sometimes the only difference is the finishing of the bolt (plated, oxide coated, galvanized or painted). Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Likes For Andrew R Stewart:
Old 06-14-22, 06:10 PM
  #5  
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,282

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1421 Post(s)
Liked 1,042 Times in 697 Posts
Originally Posted by Crankycrank View Post
+1 ^^^.
-Tapping a torx bit into the hole may have enough grip to turn it,
-Bolt/Screw extractors Screw Extractors - Ace Hardware
-Remove the other pully bolt and try to rotate the cage halves in opposite directions which may loosen the bolt a bit,
-Drill off the head of the bolt and you'll have a long enough stud left over to grab with pliers.

EV-RD-M663-3043A.xls (shimano.com) Gives you the part number (#10 or 11 in the diagram) to do a search for a replacement or go to your local bike shop.
A BIG downside to screw extractors/easy outs is that if you break one off you now have a piece of hardened steel to contend with, too.
dsbrantjr is offline  
Likes For dsbrantjr:
Old 06-16-22, 08:38 AM
  #6  
Gummomarx
Member
Thread Starter
 
Join Date: Aug 2015
Posts: 47

Bikes: Juliusseive

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 5 Times in 4 Posts
Thanks folks - I've sent for the drill bits. Fingers crossed.
Gummomarx is offline  
Old 06-24-22, 01:54 PM
  #7  
Gummomarx
Member
Thread Starter
 
Join Date: Aug 2015
Posts: 47

Bikes: Juliusseive

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 5 Times in 4 Posts
Mission accomplished, thanks to a combination of methods offered here and other forums:

The new pulley bolt arrived today. I removed the bottom pulley and with the chain on the smallest sprocket, I was able to rotate the derailleur's outer cage plate after having removed the limiter-screw. This allowed the bolt to turn anti-clockwise enough so that, when I inserted the allen-key and put downward pressure on the tool, I managed to get sufficient bite into the bolt to get it fully turned and removed. Hallelujah!

Thank goodness I didn't have to resort to drilling etc. Thanks also to the denizens of this thread for the inspiration, freely given, which spawned a solution to a tiny bolt with a big headache.

Last edited by Gummomarx; 06-24-22 at 05:19 PM.
Gummomarx is offline  
Likes For Gummomarx:

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.