"There is a cheap way, and the right way...... The cheap way is to inject or slather in epoxy and screw it together enough to stop the rattles and get some transmission of sound, without taking everything apart. The right way is to tilt the piano, remove the bass strings, clean and repair gluing surfaces, shim to get downbearing, and epoxy and screw and/or dowel the bridge back in place". Well I am pleased to note that on the two occasions I've done this work, I did it the right way! On both occasions the bridge was completely detached from the apron, suspended in mid-air on the bass strings. A shim was absolutely necessary in order to get any downbearing. Both the pianos were uprights of only medium value, so major repairs like a new soundboard with proper crown was not an option, and well beyond my expertise anyway. The results were highly satisfactory both times.
This PTG archive page provided courtesy of Moy Piano Service, LLC