This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Bergman is a Young Chang product and you will frequently encounter this = problem of hammer centers tightening on YC products. It is residue from = the felt. Ream and repin the ones that are bad. Protek all the rest.=20 =20 To see which ones are bad, lift all the hammers up to vertical. Then = start lowering them to the rest rail, watching to see when gravity will = overcome the friction. You'll be able to see which ones are really bad, = as they will go down to quite an angle before gravity will get them. = When friction is about right, hammers should fall when they come off = center, about 75 degrees. =20 Dean =20 Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 =20 -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On = Behalf Of Dave Davis Sent: Saturday, July 03, 2004 5:16 PM To: pianotech@ptg.org Subject: Jack pinning...do they bend? =20 Hi All, =20 Is it possible for jack center pins to be bent on a hard blow? I service = a Bergman TG150 (5'0") that is played very hard, and some of the jack = pinning is getting tighter. At first I thought it might be tight = bushings or an adult beverage spilled inside (bar scene), but I'm = thinking the pins may be bending. The piano is 7 months old. I don't = think the problem is a pin plating problem or graphite in the bushing = felt. =20 Dave Davis ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/3e/6e/b8/6c/attachment.htm ---------------------- multipart/alternative attachment--
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