hollowtech 2 bb problem

fast as fupp

using ultegra 6600 bb with tiagra 4600 chainset- works well most of the time then i get noise and vibration which i can feel in cranks- makes a pretty loud sound then goes away- only happens wehn im pressing hard

everything is greased and tight

im flummoxed- has the b/b gone?

wheelygood

Pedal bearings?

rafletcher

Well some bearing has gone - either BB or pedal. Easy enough to feel by hand though I'd take the cranks off to turn the BB bearings for best feel.

fast as fupp

not the pedals- put different ones on today and the grinding continues


new bb on the way though!

mikenetic

I found that my setup (Tiagra BB and Tiagra chainset) is very susceptible to clicking under load if it's not torqued up correctly.

I got round to buying a torque wrench, set it right for the middle of the suggested torque values and since then I've not had a peep out of it.

Might be a different issue to yours, but it's definitely one source of noise from Hollowtech 2 setups.

Mettan

My drive side HT2 cup bearing shattered on Sunday - made some loud cracking/clicking sounds for about 10 seconds before the cranks almost completely jammed solid - got the replacement 4500 cups today (I'm running an FC-4550 HT2 chainset) - fitted them fine with the help of some Stiltson grips (rather than the proper tool) - pleased with the job - I made a mistake near the end though by forgetting to loop the chain back around the chainset before fixing it all back together ...... - (couldn't find the KMC missing link in rapid time so had to disassemble the whole lot to place the chain around the cranks/rings as opposed to leaving it ''behind'' them :oops: