Richard, I've not seen it before but I'm wondering about the seemingly good amount of clearance between the wire and the bushing. Could it be that the cleaning and application of your chemicals only disguised the real problem? Could it be that the wires are leaning on one side of the bushing too much and causing the slow return? Just a thought. The seemingly large amount of clearance makes me wonder. Best, Greg Newell Greg's Piano Forte 216-226-3791 (office) 216-470-8634 (mobile) www.gregspianoforte.com gpf at ameritech.net -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of richarducci at comcast.net Sent: Thursday, February 14, 2013 8:07 AM To: pianotech at ptg.org Subject: [pianotech] Gunk on guide rail bushings List, this is a brand new piano, made in USA. Cleaned a black substance off of damper wires which were returning slowly or not at all. Looked similar to center pin issue in Asian pianos. Anyone see this before? I have more pics as well. Reamed bushing and used clp and ironed bushing and so far so good.
This PTG archive page provided courtesy of Moy Piano Service, LLC