[CAUT] buzzing truck

[David Ilvedson]

Look at the shape of a piano...kidney

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Joe And Penny Goss" <imatunr at srvinet.com>
To: "College and University Technicians" <caut at ptg.org>
Received: 5/15/2008 3:16:06 PM
Subject: Re: [CAUT] buzzing truck


>Hi Dale,
>Is that a pinto or black eyed susan bean.
>LOL only a keypad away.
>Joe Goss RPT
>Mother Goose Tools
>imatunr at srvinet.com
>www.mothergoosetools.com
>----- Original Message ----- 
>From: "Ward & Probst, Inc" <wardprobst at wardprobst.com>
>To: "'College and University Technicians'" <caut at ptg.org>
>Sent: Thursday, May 15, 2008 2:17 PM
>Subject: Re: [CAUT] buzzing truck


>> Dave,
>>
>> Wheels wear out, trucks usually don't. We install a vertical brace between
>> the truck plate and a bean to stiffen the assembly. Anecdotal reports are
>> that it improves the touch and tone. The brace is black pipe cut and
>> threaded to size with floor flanges fastened to the parts at each end.
>>
>> HTH,
>> DP
>> Dale E. Probst, RPT
>> Ward & Probst, Inc.
>> Wichita Falls, TX
>> mailto:dale at wardprobst.com
>> www.wardprobst.com
>>
>>
>>
>> -----Original Message-----
>> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
>> johnsond
>> Sent: Thursday, May 15, 2008 10:03 AM
>> To: College and University Technicians
>> Subject: [CAUT] buzzing truck
>>
>>
>> Hi all-
>>
>> The truck on our #2 performance piano has a problem buzz.  It has been
>> elusive for some time mostly because it's been difficult coordinating
>> the occurrence of the buzz with someone else available to play the note
>> while I check things out.  This finally happened yesterday.  All bolts
>> are tight.  When we play a Bb there is a buzz coming from somewhere
>> between the top and bottom center plates.  Laying only the weight of my
>> hand on the top plate makes it stop, remove my hand and it comes back.
>> It does not sound like any stray material is inside but it will not be
>> possible for me to remove the truck until summer sometime. What I did
>> was loosen the suspicious bolt about half way which allowed the plates
>> and arm to reposition slightly, then re tighten.  I have not been able
>> to make it recur since then.  It is a standard Colson truck from
>> Jensen's that I guess is about 15 years old.  I am inclined to recommend
>> just replacing the whole truck as I was expecting to replace the wheels
>> anyway this summer.  As anyone else experienced a similar problem with a
>> truck?  How long do you typically keep them on performance pianos?  Any
>> other suggestions.....?    It needs to be resolved with confidence.
>>
>> thanks,
>>
>> Dennis Johnson
>> St. Olaf College
>>