Bill, Yes, they can be serviced, but I'm not sure if the parts would be easily obtained. Please search the CAUT archive for an excellent set of instructions by Jim Busby on the subject. His was for eliminating slack / clunk noise in the caster when locked, but will apply to fixing your casters as well, I think. When they don't tighten, in my experience it is because people are UN-screwing them too far, and they have backed the brake screw out of the knob a little. It is not supposed to turn in the knob, as there is a locking set screw, and the threads can get messed up royally if people turn them out aggressively. As a result, the knob does not clamp down against the caster properly when you lock the wheels. When working properly, the knob should just be snugged down to keep the piano stable. When rolling the piano, there is no reason to unscrew the knob all the way to the limit - you only have to loosen the brake a little. Don Mannino -----Original Message----- From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Bill Keller Sent: Wednesday, April 15, 2009 7:01 PM To: caut at ptg.org Subject: [CAUT] Concert grand casters Can anyone tell me if the large brass concert grand casters are serviceable. At Swarthmore College we have a S&S D with Hamburg Legs with these casters. I am being told by the Concert hall manager that the casters do not lock tightly any more no matter how tightly you turn the brake knobs. Has anyone experienced this symptom with this type caster? I do not see an obvious way to get them apart for cleaning or repair. These are the ones like the CRB-46B casters from the Pianotek cat. p A-42. Any suggestions to avoid the costs of new casters would be appreciated. Thanks in advance for any responses. Bill Keller
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