Thank you for all your answers. The felts of the dampers levers are really clean. Also the rod has no gunk and looks clean too. The damper springs as well. It´s a Renner action from 1986 and the whole piano is well-kept and of high quality. The sounds have nothing to do with the pedal or the grommet because the action was outside of the piano. I can´t isolate the source of the sound. Maybe the springs, maybe the rod-felt-joint. One thing I didn´t think about are the action brackets. Maybe they are loose. Unfortunately the piano is at a customers home, not in my workshop, so I can´t check it right now. Paul, what do you mean by monkey? There was no monkey, but the customer has a cat :-) Gregor To: pianotech at ptg.org Date: Tue, 12 May 2009 15:40:21 -0400 From: wimblees at aol.com Subject: Re: [pianotech] lubricating damper springs? Gregor If the spring groove has graphite, then you should only use more graphite. Putting fat in the groove will attract dust, which will gum up, and cause sluggishness in the spring. The other cause of the noise could be where the rod pushes the levers. Remove a damper lever, and if you see that the felt is black and corroded, you will need to brush off the black stuff, or turn the felt strip around. (remove it, and put the bottom where the top was). Just polishing the rod will not be enough to solve the squeaking problem. In some cases, the felt will be worn through, and the rod is actually rubbing against the wood of the lever. In that case you'll need to replace the felt, or if you don't have any to replace, turn it around. Willem (Wim) Blees, RPT Piano Tuner/Technician Mililani, Oahu, HI 808-349-2943 Author of: The Business of Piano Tuning available from Potter Press www.pianotuning.com -----Original Message----- From: Gregor _ <karlkaputt at hotmail.com> To: pianotech at ptg.org Sent: Tue, 12 May 2009 2:49 am Subject: [pianotech] lubricating damper springs? List, I have a problem with annoying sounds when depressing the right ped al of an upright very slowly. It turned out that it comes from the dampers or the rod that lifts the dampers. Usualy I fix it with lubricating the springs and the rod and the hinge-joints of the rod. But in this case it did not help. The spings are not embedded in felt or leather but in graphitated wood. I used stag fat for the dampers and the rod, which usualy helps allways (for the hinge-joints I used Protec CLP). Was that a mistake instead of using graphit for the spring embedding? I mean, if new graphit were the only way to solve such a problem, then a future application of graphit could be hindered by the fat on the springs. But I am not shure about that. Any ideas about the source of these sounds and the solution of that problem? It´s an Ibach C upright from 1986 with a Renner action. It seems that the bass dampers are the main culprits. Gregor Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! Try it! = We found the real 'Hotel California' and the 'Seinfeld' diner. What will you find? Explore WhereItsAt.com. _________________________________________________________________ Windows Live™: Keep your life in sync. Check it out! http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_allup_explore_012009 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090513/a32d81e0/attachment-0001.htm>
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