Bottom bracket/crankset service 105 5700

rob39

Looking to give my bottom bracket/crankset a service. Can do the majority of servicing myself on the bike but never done the bb/cranks. It's a shimano 105 SM BB5700. Some clicking noises appearing especially in a big gear and putting the pressure on.
Any advice or point me in the right direction. (not the local lbs)

Man Of Lard

Buy the tool to remove it. Remove it. Replace with the same piece. Decant old one into the bin.

The whole assembly is about a tenner. Not worth servicing. If you're feeling flush upgrade to the BBR60 (MAY require a different tool if the adaptor doesn't fit your recently acquired BB tool)

redvee

I've picked up BBR60s for just over a tenner and they have come with an adaptor for the larger BB tools to fit the smaller BBs.

sungod

^this, check everything - seatpost, saddle, chainring bolt, pedals, quick releases, etc. etc. etc.

if you do swap the bb, put some antiseize on the threads of the new one, helps removal in future

rob39

Thanks guys, yea I know it could be a multitude of things, I'm just going to give the whole area the once over.
What are the signs of the BB starting to go?

wongataa

rob39 wrote:

Thanks guys, yea I know it could be a multitude of things, I'm just going to give the whole area the once over.
What are the signs of the BB starting to go?

My Shimano Hollowtech bottom bracket went recently. I had a creaking noise that got worse over time. I checked other possibilities for the creak but I bought a new BB just in case as they are cheap. When greasing/tightening other possibilities didn't cure the creak I just replaced the BB. The creak was now gone!

They are easy to swap. Get a tool that pits a socket wrench as I have found they are easier to use and you can use them with a torque wrench to tighten the new BB up enough.

sungod

rob39 wrote:

Thanks guys, yea I know it could be a multitude of things, I'm just going to give the whole area the once over.
What are the signs of the BB starting to go?

if you've got a kmc/similar removable link on the chain, take the chain off and rotate the cranks by hand to feel for any roughness, also check for any play by applying force to the crank in other directions

if you haven't got a removable link on the chain, consider fitting one when you next put a new chain on, it makes cleaning/servicing easier

rob39

sungod wrote:

rob39 wrote:

Thanks guys, yea I know it could be a multitude of things, I'm just going to give the whole area the once over.
What are the signs of the BB starting to go?

if you've got a kmc/similar removable link on the chain, take the chain off and rotate the cranks by hand to feel for any roughness, also check for any play by applying force to the crank in other directions

if you haven't got a removable link on the chain, consider fitting one when you next put a new chain on, it makes cleaning/servicing easier

Yea always use KMC chains with quick links

milemuncher1

I've just finished sorting out my third colleague's "creaking clicking knackered BB". It's amazing what a spray of MO94 on the pedal axels does to silence the "knackered BB init ".