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

Is there felt lining the hole? There usually is. If so, some of it may have been worn away. Replace it.

Thanks BDB
I guess I was reading too much into it and neglected to see it.
Thank you for the wake-up call.

Mark

If there is too much friction, replacing the felt will be temporary, as the new felt will quickly wear down. Options include changing the trap lever position a bit, or changing the dowel push rod position on the trap lever, or Changing the dowel push rod position on the damper tray, or as you said, notching out the hole a bit more. Sometimes a smaller dia dowel might work.

You want to make sure that dowel is free to move before re-felting the hole. I prefer changing the dowel angle at the trap lever over the other options, if possible. This is actually a common problem - one that will always re-occur unless the rubbing dowel is re-positioned.

How about some quick work with a rat-tail file on the hole. I bet .5 mm of filing is all it would take.

BDB, BOB and ROY123,

As it turned out, I did the following
I removed the pitman and checked for any felt that may have been worn away. There were no worn spots.
Someone (the owner I assume) had soaked the surrounding felt with some type of liquid. I soaked that up and the felt appeared to be in fine condition. (but thicker than the other two) I figured that the hole was just too small and that the brass rod was just rubbing in the hole as the humidity increased.
I took some very fine steel wool and smoothed the rod at the point of contact.
Then I took a burnishing file to the felt to take off a bit of felt and smooth it down evenly.
This did the trick.
There seemed to be bit of play in the side to side movement so I glued a small piece of felt to the end of the rod where it makes contact with the linkage.
End result---Client was happy and wants me to install a damp chaser on this same piano.

Thanks for all your help!!!

Mark