I was able to do it by exerting force against it. Since it is recessed in the center my finger didn't slide. ~ Larry, Darn Good Design On Thursday, July 24, 2003, at 08:47 PM, Bill Judson wrote: > Sounds good. My only problem is that I don't see any obvious way to > rotate > the ring off...there are no groves or treads that I can exert pressure > on > to rotate, as a desktop mouse usually has, or any obvious way to get my > fingernails or a screwdriver under the ring, without my seeming to > risk breaking it...or is this in some documentation I don't know > about? It > doesn't seem to be in the service manual, that I can tell, or the user > manuals.... > > TIA, > >> You should just be able to rotate and remove the retaining ring and >> trackball. Once those are out of the way you can clean the rollers. >> FYI, I had a 280c that exhibited that problem, turns out oneof the >> plastic rollers had disappeared so I bought a replacement assembly for >> $10. >> >> ~ Larry, Darn Good Design. >> >> >> On Tuesday, July 22, 2003, at 09:52 AM, Bill Judson wrote: >> >> [...] >>> >>> While we're on the subject of trackballs, anybody have any advice on >>> how >>> to open up the trackball assembly itself? >>> >>> I have a 270c whose trackball seems to have lost its grip, especially >>> when >>> moved vertically -- often it will just spin & spin without grabbing >>> whatever it is it is supposed to grab. I imagine that it's like a >>> desktop >>> trackball, in that there are little rollers that occasionally get >>> gunked >>> up, as with mice. >>> >>> Maybe I'm wrong; I have the service manual, but there doesn't seem to >>> be >>> anything specific about how to get into & under the trackball itself >>> (as >>> opposed to removing the assembly as a whole). Thanks, >>> >>> -- >>> Over, >>> >>> Jutso >>> >>> http://pages.ripco.net/~jutso/