Hi,
I have run into a couple of issues with my BBS02 after ~4000 miles that I was hoping to get some help with. I think this all started because I didn't tighten the bolts on the crank arms enough in the first place. After a while the crank arms worked themselves loose, so I tightened the bolts every time I heard the bottom bracket squeaking, but they kept coming loose even though I torqued them to 40Nm after realizing they could work themselves loose (probably the squares were out of round at this point). Each time I tightened them they must have been getting pushed further and further onto the crank shafts and eventually the cranks were interfering with the bottom bracket part of the bbs02 so I had to throw them out and get some new ones. I didn't think too much of this until the new ones ended up interfering with the bottom bracket also after re-tightening a few times and also wouldn't stop squeaking (this time I torqued the bolts to 40Nm when first installing the crank arms), so I decided to have a closer at the bottom bracket. It seems like there is a lip on the bottom bracket that is pretty badly damaged (see photos).
After looking at a few videos/pics of dismantled BBS02s, it seems like this lip might be holding a 'cup' in place - with the bottom of the cup being inside the bottom bracket and providing the surface that the bearings push against when you tighten the crank shaft lock nuts as shown in this pic:
I haven't had a chance to take the whole thing apart yet because I'm using it get to work everyday. Does anyone know what is going on here? Is this a big problem? Can I replace that cup thing or am going to have to get a new unit?
I also guess I need to get a new crank shaft and cranks because I might have worn the tapers out on the shaft and arms (because my new crank arms can get pushed on too far also even though I was careful with the new set to torque the bolts to 40Nm from the start). Where is a good place to get a replacement crank shaft from? Who has the best selection of BBS02 replacement parts?
There is also one last problem (for now)! One of the M6 bolts that attaches the mounting plate to the motor seems like it might have been stripped... I tightened it until the spring washer was compressed, and tightened it a little bit more (not that much!) and suddenly it started turning fairly easily again, so I stopped trying to turn it, and assumed that it have been stripped.... Is it possible to just replace the BBS02 LHS outer case?
Thanks!
I have run into a couple of issues with my BBS02 after ~4000 miles that I was hoping to get some help with. I think this all started because I didn't tighten the bolts on the crank arms enough in the first place. After a while the crank arms worked themselves loose, so I tightened the bolts every time I heard the bottom bracket squeaking, but they kept coming loose even though I torqued them to 40Nm after realizing they could work themselves loose (probably the squares were out of round at this point). Each time I tightened them they must have been getting pushed further and further onto the crank shafts and eventually the cranks were interfering with the bottom bracket part of the bbs02 so I had to throw them out and get some new ones. I didn't think too much of this until the new ones ended up interfering with the bottom bracket also after re-tightening a few times and also wouldn't stop squeaking (this time I torqued the bolts to 40Nm when first installing the crank arms), so I decided to have a closer at the bottom bracket. It seems like there is a lip on the bottom bracket that is pretty badly damaged (see photos).
After looking at a few videos/pics of dismantled BBS02s, it seems like this lip might be holding a 'cup' in place - with the bottom of the cup being inside the bottom bracket and providing the surface that the bearings push against when you tighten the crank shaft lock nuts as shown in this pic:
I haven't had a chance to take the whole thing apart yet because I'm using it get to work everyday. Does anyone know what is going on here? Is this a big problem? Can I replace that cup thing or am going to have to get a new unit?
I also guess I need to get a new crank shaft and cranks because I might have worn the tapers out on the shaft and arms (because my new crank arms can get pushed on too far also even though I was careful with the new set to torque the bolts to 40Nm from the start). Where is a good place to get a replacement crank shaft from? Who has the best selection of BBS02 replacement parts?
There is also one last problem (for now)! One of the M6 bolts that attaches the mounting plate to the motor seems like it might have been stripped... I tightened it until the spring washer was compressed, and tightened it a little bit more (not that much!) and suddenly it started turning fairly easily again, so I stopped trying to turn it, and assumed that it have been stripped.... Is it possible to just replace the BBS02 LHS outer case?
Thanks!