It can also be a feature, while some techs like to simulate a "tonal pedal" by allowing the bass dampers to rise first, othere believe it is more useful to the pianist if the treble can be enlighted with the pedal while the basses stay clean.
Just a choice, I prefer the second one, if you dont find it useful then it is not .
It happens also that due to the damper felt wear, the basses raise sooner (or the opposite, or the damper rod have bend (but it may be rare, and mostly if the axis have took too much play)
Reglating the damper rise at large is way less than one hour, but taking out the rod, changing the cloth in the axis, cleaning and lubing the rod and the cloth and mounting back everything is way more , lets say 1:30.
At last we dont need to regulate also the individual raise of the dampers at the same time , on most verticals (as there is an individual regulating screw for the pedal lift)
dampers placement can be corrected, , sometime, due to wear of felt, loss of pressure may happen at one end of the head, it can cause improper daming in basses mostly on tall verticals.
Edited by Olek (03/10/13 12:54 PM)