<HTML> <HEAD> <TITLE>Re: Sangler & Sohne Serial Seizing Centers</TITLE> </HEAD> <BODY BGCOLOR="#FFFFFF"> Dave, This reminds me of experiences I've had with some Yamahas (and possibly oth= ers). When I remove the centerpins I find that they are bent. You replace wi= th the same size or next size up and they are free and remain so. I've wonde= red (as these are invariably original pins, same size as all the others) if = sometimes as an action is being assembled in the factory, workers bend the p= ins to create alignment (squareness or travel) in a part. Then in time, the = pin moves slightly laterally or turns a bit as it loosens in the wood and in= its new configuaration causes the part to seize. You try all the others, an= d they are fine; then a few months or a year later a few new ones turn up ti= ght. Have you noticed if those pins were bent?? Joseph Giandalone,RPT   ---------- From: "Dave Bunch" <pdtek@home.com> To: <pianotech@ptg.org> Subject: Sangler & Sohne Serial Seizing Centers Date: Fri, May 18, 2001, 12:06 PM <BLOCKQUOTE>I service a three year old Sangler & Sohne i= n a nursing home. Among its many problems is that as time passes, the center= s start seizing up a few at a time. I mean they will be fine when I am there= tuning an a month later five whippen centers will be so tight you can barel= y move the flange by hand! Protek won't touch it. I have to repin them, chec= k the rest of them. Everything is fine then I get a call a couple months lat= er and there are several new ones. Is glue leaching through the bushings? Is= there any solution besides repining the whole action? They would hit the ce= iling with that suggestion. Anyone else seen this?   Dave Bunch   </BLOCKQUOTE> </BODY> </HTML>