It turned out to be that part of the action assembly (whippen?) was not moving in a straight motion, lightly rubbing against the neighboring action assembly. He had one of his technicians come over and pull out the action to have a look. He (apparently) was not previously aware of the problem. I also noticed the note D3 had a harsh clicking noise whenever striking the key. I noticed some inconsistencies in the timing of the dampers and hammers when slowly striking different notes. My own amateur inspection revealed some definite problems with the action. action tends to get quite loud after a few years." In a reply, someone posted "Young Chang has switched over to a new knuckle which is much improved, and they will pay techs (as part of warranty) to replace the old ones in older pianos".Īrmed with this knowledge, I went back to the dealer to have another look at the used Young Chang G-157. Another technician said "knuckles will get hard after about 10 years and will need to be replaced. It is up to the dealer to do this as prep work, and with a used grand, there's no telling if the original dealer did this or not. One technician who specialized in YC grands said that every single one out of the factory needs "jack alignment to knuckles, let off, drop, repetition lever sprig adjustment, and lubrication to action centers, damper guide rails and knuckles".
Over the weekend I read on that the Young Chang grands need considerable regulation to play their potential. I can't express how helpful this forum has been in educating me to make a good decision! I'm still very interested in the used 1994 Young Chang G-157 and I'd like to do my best to determine if this is a good piano before I buy. Thanks to everyone for the excellent advice so far.