shimano splined BB - removing cranks

Paul D said:

First time I've tried to get at a splined BB. The hex bolts on both sides
turn 3/4 turn counter clockwise then tighten up again. Surely this isn't
right? Don't want to try brute force in case I'm doing something wrong

No, that's normal behavior. I had exactly the same worry as you the
first time I encountered one of these.

What's happening is the main hex bolt that tightens and holds the
crank arms onto the spindle is beginning to bite against the removing
bolt/doobrey. That's the second circular threaded washer/cap that you
can see outside the main bolt (the one that is installed with a pin
spanner). This is how the single key removing method works.

You can safely apply pressure. It will need a fair bit of torque
because you need to pull the crank arm off the BB spindle.

--

Call me "Bob"

"More oneness, less categories,
Open hearts, no strategies"

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Call me Bob said:

What's happening is the main hex bolt that tightens and holds the
crank arms onto the spindle is beginning to bite against the removing
bolt/doobrey. That's the second circular threaded washer/cap that you
can see outside the main bolt (the one that is installed with a pin
spanner). This is how the single key removing method works.

You can safely apply pressure. It will need a fair bit of torque
because you need to pull the crank arm off the BB spindle.

If you are still slightly nervous, you can download a service .pdf
from the Shimano website which shows the bolt and cap arrangement, and
confirms that all is as it should be:

http://www.shimano-europe.com/cycling/phpimages/productserie/service_pdf/16T0B.pdf

--

Call me "Bob"

"More oneness, less categories,
Open hearts, no strategies"

Email address is spam trapped, to reply directly remove the beverage.

No nervousness, always happy to apply brute force - I've a name for
stripping threads by tightening them too much. Did what you said & the job's
done. So, ta!

"Call me Bob" <[email hidden]> wrote in message
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Quoted message said:

Call me Bob said:

What's happening is the main hex bolt that tightens and holds the
crank arms onto the spindle is beginning to bite against the removing
bolt/doobrey. That's the second circular threaded washer/cap that you
can see outside the main bolt (the one that is installed with a pin
spanner). This is how the single key removing method works.

You can safely apply pressure. It will need a fair bit of torque
because you need to pull the crank arm off the BB spindle.

If you are still slightly nervous, you can download a service .pdf
from the Shimano website which shows the bolt and cap arrangement, and
confirms that all is as it should be:

http://www.shimano-europe.com/cycling/phpimages/productserie/service_pdf/16T0B.pdf

--

Call me "Bob"

"More oneness, less categories,
Open hearts, no strategies"

Email address is spam trapped, to reply directly remove the beverage.