Can damper adjustment affect touch/action of a piano?

[piano4kay]

I just had my second tuning done on my six month old Yamaha U3.  I mentioned to the technician a slight problem with the sosteuto peddle not softening some of the keys when I want to play quietly.  He told me that he readjusted the damper.  Now I notice that when I play without the quiet peddle my piano feels a little harder to play.  I am wondering if adjusting the damper might affect the touch/action of the piano.

[iansinclair]

OK... I'm confused.  It says here in fine print that the pedals on a U3 are soft, mute, and damper -- left to right.  No sostenuto.  Presumably, though, from your comment what you mean is the middle pedal, which is supposed to be a mute pedal.

I can see that it might be possible that adjusting the dampers to make the mute pedal really mute properly could affect the feel of the rest of the piano.  On a grand, of course, it wouldn't... but then, there is no mute pedal on a grand!

[quantum]

On verticals, the common action of the left ("soft") pedal is to move the rest position of the hammers closer to the strings.  In effect allowing the player a different type of control over the action in order to facilitate quieter sounds.  Doing so also changes the feel of the action. 

On a grand, the left (una corda) shifts the entire action so that not all three strings are struck with a hammer blow, as well as allowing a fleshier part of the hammer felt to contact the strings.  The action itself is not modified, thus the player does not perceive a change in feel. 

[withindale]

 I am wondering if adjusting the damper might affect the touch/action of the piano.

A key in an upright may feel noticeably heavier when the damper is adjusted to engage earlier in the downstroke. About half way down is the general norm.