[CAUT] unmusical caster noise

[Ron Nossaman]

> The rear concert caster on one of our Ds “knocks” and I can’t seem to 
> find the “fix”. If we orient it 90 degrees to the player it doesn’t 
> knock, but if the stage crew forgets and it is in line with the player 
> it will knock with vigorous playing. (Fairly loudly, like someone 
> tapping their foot.) The leg seems to be tight. It is the actual wheel. 
> It is the big expensive brass kind, but unfortunately not Jurgen’s. Any 
> simple fix?
> 
>  
> 
> The front castors lock (and have no problem) but the rear doesn’t. I 
> can’t see how/where/why it is knocking, but it surely does.
> 
>  
> 
> Thanks.
> 
> Jim Busby BYU

Try swapping it with one of the front ones. It may work, or if 
not, may give you a clue why it's doing it in the first place 
once it's out.
Ron N