Crank loosening causes

[Username]

It is a poor substitute for greasing the tapers. He doesn't say where they should be whacked but if you understand the mechanism by which a crank taper square releases stress you will also realize that simply standing and bouncing on the cranks, first goofy, then hotfoot, will make them seat higher upon the taper without having to hammer them. The type of hammering required - axial - will not be bearing friendly.

I have described the mechanism above.

Are we still talking crank here or has pedal loosening, a completely different phenomena, been put into the mix?

whack them on the crank bolt (inwards).

 

[Yellow Saddle]

whack them on the crank bolt (inwards).

Literally hit the crank bolts (possibly with a punch or such) or hit the crank axially?

 

[Tim Hall]

Title edit @Tim Hall ? Is junior @Milkfloat pedaling backwards?

I can't see how to edit the title. @Moderators , can you change it to "Crank loosening causes"? Ta ever so.

 

[mybike]

whack them on the crank bolt (inwards).

Surely you need to strike the crank, not the bolt. In any case the cause of the crank not moving on the taper will be it fouling so wouldn't grease as @Yellow Saddle suggests obviate the need, the pressure from the bolt should be sufficient.

 

[Smurfy]

It is a poor substitute for greasing the tapers.

You are not seriously advocating grease on square tapers are you?

 

[CaadX]

Had a similar problem with an mtb last year, crank kept loosening tried everything finally resorting knocking the cranks onto the tapers with a mallet and bingo it worked no trouble since. However am I suggesting anybody else give it go, that would depend on whether you are willing to replace anything you may damage.

 

[Yellow Saddle]

You are not seriously advocating grease on square tapers are you?

Seriously.

 

[Username]

whack them on the crank bolt (inwards).

tap till they meet bearing properly tightening between taps

 

[Scoosh]

I can't see how to edit the title. @Moderators , can you change it to "Crank loosening causes"? Ta ever so.

Sorted.