Having done three in the last month, here's my latest updated procedure. the cord is available from the supply houses or use what others recommend. Yamaha vertical flange cord replacement procedure Decide if repining is in order before removing hammers from rail. Apply a CLP to the bridle wire ends and remove the straps. Remove the hammer rest rail treble pivot arm (only) and remove the rail by sliding it towards the treble. Remove the Let Off rails. With the rails out of the way disassembly and reassembly are much easier, the jacks slip forwards unencumbered. Remove the hammers/flanges, place on holding tray, number each and separate. Be careful not to press down on the wippens causing the damper spoon to bend. File the hammers on an oscillating spindle or drum sander. Trying to mate old string cuts in the hammers to the strings during reassembly is not recommended. Optional: taper hammers; right side bass, left side tenor, both sides treble. 44 mm cord length: wrap the cord around a 14 mm or 9/16" dowel or some other material of such a dimension to get 44 mm when the cord is sliced along the length of the wrappings. Secure each flange in a vise to clean the grooves (a hacksaw blade works well), do the set. Glue cord end 10 mm onto one side of the flange, entire set. The glue will be set to install the other side from the beginning. Use PVC-E or some other white glue. Repin if needed. Before the flanges are reconnected it's a good time to apply Teflon powder to the butts in groupings. Reassemble butts and flanges. While the hammers are out, lube the damper spring punching. Adjust damper spacing and pedal lift. It's also a good time to adjust damper and jack spring tension if you're so inclined. Install hammers, space to the unisons, travel as needed; space strings as needed. Install Let Off rail, hammer rest rail and reconnect bridle straps. Spring tension: 40 grams measured at the spring is roughly equivalent to 20 grams measured at the flange. The angle between the arms is around 90 degrees. Another procedure can be found here: (see photo at end): https://www.moypiano.com/ptg/pianotech.php/2006-December/198869.html -- Regards, Jon Page PS My saw blade is mounted between two wooden slats (RennerUSA) and protrudes the appropriate distance for quick slot cleaning. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080830/b0d96a0c/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: Yamaha vertical flange cord replacement procedure.doc Type: application/msword Size: 51712 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080830/b0d96a0c/attachment-0001.doc
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