<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word"><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.6000.16544" name=GENERATOR> <STYLE>  </STYLE> </HEAD> <BODY lang=EN-US vLink=purple link=blue> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080>Jim,</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080>Sometimes those big German casters rock a little when locked in the front - I have heard that noise before, but not from the un-locked caster.  The locking casters tend to wear a bit, and acquire a little knocking free play when locked down.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080>You might try a little spray grease on the caster axle, to see if you are getting noise from an unlubricated shaft.  Start up friction could be at fault, with a little rocking of the piano making a noise.  I haven't experienced this, though, so it's just a guess.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080>Kawai puts the locking casters on the front to give the most solid basis for the player.  If either of the front legs have a little wiggle in them, then this can take a small amount of power out of the tone.  Similar argument as for tonal loss from a spider dolly.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=531003716-05122007><FONT color=#000080>Don Mannino</FONT></SPAN></DIV><BR> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] <B>On Behalf Of </B>Jim Busby<BR><B>Sent:</B> Tuesday, December 04, 2007 7:51 PM<BR><B>To:</B> College and University Technicians<BR><B>Subject:</B> [CAUT] unmusical caster noise<BR></FONT><BR></DIV> <DIV></DIV> <DIV class=Section1> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">All,<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">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?<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">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.<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks.<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Jim Busby BYU<o:p></o:p></SPAN></FONT></P></DIV></BODY></HTML>