The problem is that, whether you grasp it or not, your BB and its crankset is finished. Cut your losses and install a new Shimano square-taper setup. That will be the end of the problem, and is the correct setup for the loads you carry.
Of course not.
The contrary - I cut my losses by NOT spending extra by keep using this part for the time it should have been usable.
The first Octalink BB failed within a year - alot play on the axle.
The replacement failed within weeks - left crank losening.
And the loads I carry sit on my wheel axle not on my bottom bracket so don't suggest my usage ot the bike is a cause.
This Octalink 1 replaced the square taper BB it originally was.
The reason I wanted to try a splines BB was my 10+ years good experience on a previous singlespeed bike that had a Hollowtech 2 BB. The bearings lasted long and the chain tension stayed steady over its run.
But the dealer said that HT2 didn't fit the bike, instead he offered Octalink 1.
It didn't solve the chain tension variation.
All it did was delivering a single year bearings life.
During which the left crank never losened.
And then, the current, it does.
He probably sold me a crap one he had left in stock for years.
Also suggested by the contradiction - dealer said he had in recent years no idea if part would be available and when delivered - the havoc the lockdowns made, yet, less than a week later a mail that my bike was ready.
It's not a matter of grasping you, it's a matter of refusal to reward crap dealers with orders that shouldn't have been.
SO, I continue check & retension, what I did since the month it was mounted.
We're a year after bottom bracked finished.
There is a gas furnage here that a dealer declared as unrepairable / finished. That was in the seventies. My mother asked a handyman a second opinion and the furnage worked until mother left. That was 2 years ago.
Go figure.
The only thing that matters for me, is to avoid a sudden and catastrophic failure, as in, the crank comes lose, and can't be remounted, leaving me stuck along the road.
As far as it looks like now, if I take care to check enough times, and recognize fast enough a pending losening, that shouldn't occur, no?
As also said, I'll see if I can shield the cranks entry into the bottom bracket from rain / water.
Because after many months no losening, it restarted shortly after a very heavy rain with roads blank.
Could be coincidence, but water acts abit as a lubricant so it is possible. The reason I digged freewheel and went to fixed was also that. Heavy rain and all of sudden freewheeling forward too. That's a stuck along the road.
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