Bottom bracket undoing has locked the crank

[steveparry]

I recently bought a bike which had been built up from a new steel Italian frame from Ricci cycles in Cornwall. The bike had done only a few miles. Today I was riding when the cranks locked solid. The back wheel continues to roll forward no problem but it won't turn backwards of course. On looking at the crank area I see the bottom bracket has unscrewed itself several turns... I guess this caused the locking. See photos. How do I repair this?

I'm guessing I'll have to do it like this: 1 Undo the crank bolt (Centaur) with my 8mm allen key - hope this hasn't locked too. 2 Then I'll have to buy a crank extractor to take it off completely. 3 Buy a b bracket tool to screw it in again? Would this be right? I presume it unscrewed itself because the original DIYer didn't torque it up properly? Or perhaps, because its an Italian threaded Veloce bracket with a right-hand thread, it came loose because he didn't put some kind of loctite on the threads? Campag say that frames should have a drainage hole when using their brackets. I don't see one on this frame is this a problem?Any help appreciated. Steve

[Mick F]

The way I see it, is exactly like you!
Cranks off
Tighten up BB properly with Loctite
Refit cranks

Hopefully, there's no damage done. When all is off, give everything a good looking-at before re-assembly. Any tools you buy will stand you in good stead for the future. Money spent on tools is never wasted.

BTW, I've never had any drain holes in my BB.

[braz]

Mick F - I'm in hospital next week having a drain hole put in my knee - will they have to use Loctite on it?

regards to all, Braz

[fatboy]

Mick F - I'm in hospital next week having a drain hole put in my knee - will they have to use Loctite on it?

regards to all, Braz

Can you get then to make the hole a greasing/oiling point for future lubrication

[Mick F]

Hope your knee makes a good recovery, Braz!

Meanwhile, back at the OP, is that alu grindings on the seat tube I see?
Maybe something is damaged, probably the chainset as the BB cup is steel. Give it a good looking-at, but hopefully the damage will only be superficial/cosmetic.

[braz]

Mick F, thank you for your sentiment.

It appears that I have to visit a Russian specialist - I think that's what they said - sort of an Orthopaedic Sturgeon......

regards to all, Braz

[ianr1950]

I must admit to never having my BB come loose on the only Italian frame I have and I have never used loctite.
It's been on for over 6 years now and and done about 15000 miles.
I'm not saying don't use it as if it gives you peace of mind then thats good enough.

[steveparry]

Thanks for all your help. Think I'll take it to the local shop who can also fit a new cassette while their at it. Can do without buying four tools inc a chain whip and cassette extractor as well at the moment!

Steve