Replacement of a Shimano Press Fit Bottom Bracket

[MrRammista]

Hello,

I have a problem my dealer says that my press-fit bearing is broken but he did not know myself why I'm asking now as when I see it? Are there any showing signs it is only 3000 km has allso still fairly new ...

Sorry for my english I'm from Austria.

Thanks for your help.

[JamesKim13]

NEVER use a claw hammer for repair, ESPECIALLY if it has a wooden handle. Hammer is fastened onto its handle with nothing more than friction. This means that with repeated bashing the head could become loose and eventually fly out damaging your precious hand, frame or whatever happenes to be in its path. A hammer is only used to drive nails into wood. A mallet on the other hand screws onto its handle and is perfectly acceptable around machine shop, automotive repair shop, bike shop, ect.

[janstetka1]

What grease do you put on the crank tube?

[tm7707]

full pro kneeling on the floor...

[vinnyesor]

Please GREASE, someone tells him.

[welovemountains]

umm, the real world versus text books....

[Bojchee]

Hmmm, have a comment on removing crankset. First of all you should loosen hex bolts and after that, plastic shellnut. In this order you do not need any force to remove plastic shellnut. When reinstalling cranks, there is no need to use ratchet tool, that's why tools for thightening plastic shellnut, are made from plastic and should be tighten with the hand. Otherwise, nice video. Thanks and no hard feelings...

[staikeinthahood]

@Bojchee agreed. if you tighten up the plastic preload nut too much, the bb will not last as long and turn slower, same thing as tightening the headset too much. :)

[sester39]

Great video thanks.

I have Shimano SM-BB91-41 in my Cube BB and it really does not feel very great even after a few hundred miles. My old LX crank bottom bracket seems to spin so much smoother and free.

Is there better replacement bottom bracket i can fit. I am running an XT FC-M770-10 Crank.

Was that an FSA BB you fiited in replacement on the shimano and are they better?

My current BB seems very stiff and has a lot of resistance when the cranks are spun.

Many Thanks

[davelee88]

Is that dog crap I can see?

[tigeragon]

This is exactly what I was looking for. I bought my Lapierre Zesty 514 for a while and the Shimano XT crankest makes horrible noises after only 3000km. I wanted to see the bearings. That was the first moment i saw a press BB. I was all like WTF. So i start to search. On the Shimano site NOTHING. Then i found this video. GREAT. I saw the tools that i need. TL-BB 12 and TL-BB 13. I searched again where can i buy it. After i saw the price i was so mad. I hate shimano, they make me always so mad.

[smarfi]

what tipe of crank set fits with sm bb91 41a?

[smcclaw1]

Great video. Thanks

[welovemountains]

There are several tools on the market to push the 'press fit' bb in. We put them into the frame dry without any grease. We used GT85 to clean the frame out first.

[hexydenise]

@welovemountains DUMMMBBB!!!!!!!!! Should allways use Anti seize or grease ROOKIE!!!!

[pedahmpf]

thx for this video now i know what i need to do the same :) ... but normally it has to be shimanos job to put such a video to you tube ...

i guess you used these tools

TL-BB 12 and TL-BB 13 ? Thats how they are called in germany.

is the new bearing dry when you press it in the frame or did you put some grease on it ?

[welovemountains]

It is just a bit of GT85!

[badmunja1]

Thank you very much, you have helped me solve the problem, great video

[CMNajar]

that products used to clean the inside of the pedal box? brand, type?