I am recommissioning my 1098 and I am facing a bit of an issue with refitting the rear calliper carrier. I disassembled the hub for cleaning / greasing. I took the calliper carrier off, undoing the circlip which was very tight. Time to refit and there is no way that it wants to go back in. I have measured the space between the wall of the hub and the groove of the circlip and I am measuring 14.66mm. I measured the stack Spacer / O-ring / calliper carrier / O-ring / Spacer and I get 15.74mm. So, I am about 1mm off. No surprise this is a struggle. The spacers are 1mm thick. Does anybody know if there are different thickness for those - like 0.5mm?? For information, I am talking about the spacers #15 in the part page below thanks you for the help
It’s a bugger to get back. Get the circlip into the hub as far as you can and with a flat punch and a bit of tappity-tap-tap you can tap it in until it clicks into its groove. When you’re measuring the combined height of 15,16,17,16,15 you can’t compress the o-rings sufficiently just by squeezing them together with your fingers. Its a big circlip, for which you need big circlip pliers, I think mine are 16”
So, that's one where the hammer is a legitimate tool to be used then ;-) The gentle tap with a rubber hammer did not get me very far so far!
It is a tight fit. Watch for the last shim dropping into the circlip groove. That’s the ball ache. Plenty of grease on the o rings to hold the shims in place and as Paul said, finish off with a light tapping of the clip until it seats.
Thank you - managed to get it to fit It wasn't that tight on the 916-996. I don't completely get why it is that tight.
This thread resurrects a question from the back of my mind, what exactly is the purpose of those o-rings on the calliper carrier ?
I guess their squeeziness helps keeps the calliper aligned and fixed while also allowing for adjustment of the hub. When you rotate the hub for chain tension, there needs to be some flex / tolerance in the calliper carrier assembly. But I am not sure why it has to be so tight, because it makes it effectively floating. Maybe it cushions it a little to prevent vibrations.
They're in there to help allow the brake carrier to rotate when the chain is adjusted. Kind of a crude bearing if you like and a seal all in one...
