Yamaha C7

[Roger Jolly]

Hi Newton,
                 Thank's for the tip, the only really bad springs that we
see, are on piano's that have been brought in from elsewhere.
Our dry climate is kind in this department. But it can be hell on balancier
flange joints, 50% of rubbing jacks is usually the joint.
Regards Roger



At 10:23 AM 06/12/99 -0500, you wrote:
>Very good, indeed, but if you flip the springs out of their slots, and
>use a mototool polishing wheel on the spring ends, turn the action up
>side down and then do steps 4 through 8 will save time, a lot of
>time.  (Done this with older S&Ss)
>
>		Newton
>
>Roger Jolly wrote:
>> 
>> Hi David,
>>              This has worked for me, and seems long lasting.
>> 1. Remove the wippens
>> 2. Unhitch the rep springs
>> 3. Clean the ends of the springs with naptha.
>> 4.  Take a vertical hammer shank and sharpen the end with a pencil
>> sharpener, it makes an ideal to burnish the slot.
>> 5. Burnish the slot vigorously with the shank, resharpen as required.
>> 6. With a small artist brush coat the bottom of the slots with dag.
>> 7.  Reburnish with the sharpened shank.
>> 8.  Reassemble and budget for a major reg.
>> 
>> Hope this helps.
>> Roger
>> 
>> At 11:14 PM 03/12/99 -0800, you wrote:
>> >List,
>> >
>> >I worked on a Yamaha C7, #5070074, about 8 years old.  I
>> >noticed a odd clicking, frictioney sound and feel.  I removed a
>> >wippen and found green "emrylon"? in rep spring groove.
>> >Where the spring contacted the groove the emrylon was gone
>> >and there was a wood/white spot.  I'm not sure if there is a
>> >dent in the groove but a drop of Protek temporarily? fixed it.
>> >Worked smooth as can be.  What is the correct lube here?
>> >Should I smooth groove with a cuticle stick or such?  Is this a
>> >warranty item?
>> >
>> >David Ilvedson, RPT
>> >David Ilvedson, RPT
>> >Pacifica, CA
>> >ilvey@jps.net
>> >
>> Roger Jolly
>> Saskatoon, Canada.
>> 306-665-0213
>> Fax 652-0505
> 
Roger Jolly
Saskatoon, Canada.
306-665-0213
Fax 652-0505