Crank Arm Removal Suggestions?

My pedals are those cheap black rubber jokes that came with Big Red, my 26" red
Emory unicycle. At this point in the game, they badly need to be replaced.
Unfortunately, one of my pedals just won’t come off. I even brought the unicycle
to a bike shop to have the mechanic try. So I bought new pedals and crank arms
from UnicycleSource.com. John Drummond spent time with me on the phone
strategizing on their replacement. He and his wife Amy are really quite helpful
(no, they didn’t pay me to say that…). I bought the crank arm puller tool from
them, too, so I wouldn’t have any problem pulling the crank from the wheel.

For those unfamiliar with the crank removal tool, it screws into the crank arm
threads after you remove the inner nut from where the arm connects to the hub.
This screwing motion pushes a fixed pin against the wheel hub, in effect lifting
the arm from the hub. My problem is that the tool handle is about 7 inches long
and the crank arm is only 6 inches long. When the pedal is removed the hub tool
works great, but because I can’t remove the pedal from the arm it cannot be
screwed into the other side of the arm to remove it from the unicycle wheel. If
the crank tool operated like a ratchet handle to a socket set I wouldn’t have a
problem. This crank arm removal tool handle is welded to the part that screws
into the hub.

Does anyone have a suggestion on how I might pull off the crank arm? Is there a
crank arm removal tool that is ratchet handled? I don’t really want to take Big
Red back to a bike shop, but do they have other tools for crank arm removal?

Thanks,

Tony

Re: Crank Arm Removal Suggestions?

Park Tool makes a cool little crank arm removal tool that will do the job for
you. It requires that you use a crescent wrench to tighten it on. You won’t have
to worry about the pedal getting in the way of this one.

See “Crank Wrench and Puller CWP-5” at http://www.parktool.com/caCPT3.htm

This is the tool that I use. Its compact size makes it easier to carry around
with you. I often pack it when I go muni.

john_childs@hotmail.com

>Does anyone have a suggestion on how I might pull off the crank arm? Is there a
>crank arm removal tool that is ratchet handled? I don’t really want to take Big
>Red back to a bike shop, but do they have other tools for crank arm removal?


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Re: Crank Arm Removal Suggestions?

If you’re going to replace the cranks as well as the pedals, why don’t you just
cut the pedal off with a hack saw?

Peter

>My pedals are those cheap black rubber jokes that came with Big Red, my 26" red
>Emory unicycle. At this point in the game, they badly need to be replaced.
>Unfortunately, one of my pedals just won’t come off. I even brought the
>unicycle to a bike shop to have the mechanic try. So I bought new pedals and
>crank arms from UnicycleSource.com. John Drummond spent
time
>with me on the phone strategizing on their replacement. He and his wife
Amy
>are really quite helpful (no, they didn’t pay me to say that…). I bought the
>crank arm puller tool from them, too, so I wouldn’t have any problem pulling
>the crank from the wheel.
>
>For those unfamiliar with the crank removal tool, it screws into the crank arm
>threads after you remove the inner nut from where the arm connects to the hub.
>This screwing motion pushes a fixed pin against the wheel hub, in effect
>lifting the arm from the hub. My problem is that the tool handle is about 7
>inches long and the crank arm is only 6 inches long. When the
pedal
>is removed the hub tool works great, but because I can’t remove the pedal from
>the arm it cannot be screwed into the other side of the arm to remove it from
>the unicycle wheel. If the crank tool operated like a ratchet handle to a
>socket set I wouldn’t have a problem. This crank arm removal tool handle is
>welded to the part that screws into the hub.
>
>Does anyone have a suggestion on how I might pull off the crank arm? Is there a
>crank arm removal tool that is ratchet handled? I don’t really
want
>to take Big Red back to a bike shop, but do they have other tools for crank
>arm removal?
>
>Thanks,
>
>Tony
>
>
>

RE: Crank Arm Removal Suggestions?

> If you’re going to replace the cranks as well as the pedals, why don’t you
> just cut the pedal off with a hack saw?

Probably easier to cut through the old crank arm. If you wanted to keep that
stuff, it would be a lot more hassle!

Have fun, John Foss, the Uni-Cyclone (reply to jfoss@unicycling.com)
http://www.unicycling.com

“I’m okay, I crash like that a lot.”

  • Dan Heaton

Re: Crank Arm Removal Suggestions?

why go to that effort? Brian Berlin Austin, TX

Re: Crank Arm Removal Suggestions?

Thanks for all the suggestions!

I decided to go to the bike shop. They had a tool that was a U-shaped medal
wedge that they hammered between the crank arm and the wheel hub. After about 4
swings, the crank arm popped off. It was much easier than sawing through the
crank arm or pedal.

By the way, with the new pedals, my ride is so much better. Now my feet aren’t
sliding all over the place and I can concentrate on other things when riding.

Life is good again, now that my unicycle is functioning!

Tony John Foss <john_foss@asinet.com> wrote in message
news:631B3F1D150FD3118E4D00A0C9EC1BDA0E354C@SERVER
> > If you’re going to replace the cranks as well as the pedals, why don’t you
> > just cut the pedal off with a hack saw?
>
> Probably easier to cut through the old crank arm. If you wanted to keep
that
> stuff, it would be a lot more hassle!
>
> Have fun, John Foss, the Uni-Cyclone (reply to jfoss@unicycling.com)
> http://www.unicycling.com
>
> “I’m okay, I crash like that a lot.”
> - Dan Heaton

Re: Crank Arm Removal Suggestions?

Tony wrote:

> Thanks for all the suggestions!
>
> I decided to go to the bike shop. They had a tool that was a U-shaped
medal
> wedge that they hammered between the crank arm and the wheel hub. After about
> 4 swings, the crank arm popped off. It was much easier than sawing through the
> crank arm or pedal.

This obviously worked but it is not really recommended as it puts pressure on
the hubs web and spokes, often damaging them in the extraction process. This
would normally be a last resort after the thread on the cranks has stripped
excluding a crank extractor and if there is not enough room to fit a bearing
puller behind the crank. Glad the new arrangement feels good, knackered cranks
and pedals just feel awful.

Roger

Re: Crank Arm Removal Suggestions?

On Fri, 05 Nov 1999 04:17:15 GMT, Tony Ferlazzo <tferlazzo@home.com> wrote:
>Thanks for all the suggestions!
>
>I decided to go to the bike shop. They had a tool that was a U-shaped medal
>wedge that they hammered between the crank arm and the wheel hub. After about 4
>swings, the crank arm popped off. It was much easier than sawing through the
>crank arm or pedal.

I missed the first exchange (not been paying attention to the group for a
while), but just in case it comes up in future - I’ve never heard of a crank
puller working like that - every one I’ve seen has an insert that goes into
the crank threads, then a second insert goes into that and is screwed down
to bear on the axle. The critical difference is that the second insert
generally just has flats on it and is operated with a spanner, so you have
no clearance problems.

When I take a crank off, I rarely take the pedal off the crank first - it’s not
usual that bottom bracket and pedal both need attention at the same time.

The other question is waht to do when the crank threads are knackered. The
answer then is to go to a care tools shop and buy a tripod bearing puller and
bodge things. That would also clears attached pedals.

regarsd, Ian SMith