NorfolkTravelle

Plan was to change the chain ring , cranks and chain

Step one: Chain off OK

Step two: Crank puller tool, despite very delicate installing has ripped the threads to pieces inside the crank

How do I get the crank and chain ring off now?

Any thoughts or other tools that would help

Cheers

10 Wheels

Any idea what bike you have?
Good photos would help.

JohnDThompson 

Pickle fork:



Or chuck remover wedges:

3alarmer

these work really well........google jacobs chuck wedges #3

or just buy these

If you're planning on reusing this crank, you'll now need them
every time you want to pull it off, but not for installation.

Almost nobody except maybe John Thompson has the tap you
need to rethread a dead end crank hole.

dsbrantjr

You might be able to use an automotive type gear puller. Be sure that there is no washer left in the crank, you should be able to see the end of the bottom bracket taper or splines.

onespeedbiker

Are you sure the puller and the crank are a match? there are different pullers for square taper and other for splines look at the end of the puller and see if it is the right size to clear the sides around the spindle end and contact just the end of the spindle); also as said before make sure you have removed any washers. Did you try the puller more than once? If not there still may be enough threads to pull the crank (making sure its the right puller). This time tighten the puller with a wrench so you know it has bottomed out.

oldskoolwrench

A little extreme sounding, but it's quick...

Take the bike to a service station (where they work on cars). See if one of the mechanics can use their air
Impact Wrench with a round stud on the end. The rapid vibration from the Impact Wrench will literally
vibrate the crank arm right off the spindle, and the round plug won't damage the finish on the arm.
On the side of the crank arm, right at the middle of the spider. Or, along the back edge if you can reach it.

I know it sounds drastic, but I've gone this route before with crank sets from cheap Sakae's to a Campy SR
pantographed crank arm. The Campy customer was amazed it even came off, and it took less than 15 seconds
with the right tool.

Just my 2¢ here...

NorfolkTravelle

Many thanks that is the sensible advice I needed

Cheers for now

NorfolkTravelle

Thanks for taking the time appreciate your advice

And a another beer does sound good

Cheers from a wet east Anglia [UK]

NorfolkTravelle

Think you have highlighted the problem appears that i did leave the washer in the crank!!

"all good experience" Thanks for taking the time

NorfolkTravelle

thanks for this and the thought process is correct. Next time must pay more attention to detail

cheers

NorfolkTravelle

Common sense and a bright idea

Thankfully live in a rural backwater of East Anglia where we still have local mechanics in a local garage

Will being seeing them at the weekend.

Cheers

pratt61799

How do those chuck wedges work? Insert around opposite sides of the BB taper between the BB shell and the crankarm, and then... pry? wedges in towards each other with a hammer?

chuckdavis

A std fix to continue to use the crank is JA Stein tool to re tap and install over sized self extract bolt
...........once you get it off

3alarmer

Generally, they are fairly thin, so you need to take up some of the space between the
crank and the BB cup that you are pushing against with something......i usually end up
using the open end of a combination box/open end wrench of the appropriate thickness
for the situation. From there, as you have deduced, one from each side and tap them
toward each other using a small hammer.

Some sort of penetrating oil, like PB Blaster (as seen on TV !!) applied to the interface
of crank and spindle from both sides (front and back) also helps usually.

reptilezs

don't underestimate the power of an air hammer i sure did yesterday. needed the bottom nut of a quill stem to swap from one junk bike to another but it was rusted in place. bottom of the fork was welded closed. coworker said to just blast through it with the hammer. worked like a charm and knocked the nut out