Squeaky Sustain

[mps@usol.com]

I am working on a Horugel 6' Grand.
The sustain pedal is very squeaky and I have traced the noise to be 
coming from where the push rod rubs against the wood as it goes 
into the hole on the underside of the piano and then up to the action 
itself.
Is there a certain lubricant that works best here or would you drill that 
hole larger in diameter to remove the point of contact?


Thank you


Mark Montbriand
Mark's Piano
Service