Pianotech

Movers took a GP1 off the skid board and left the piano resting on the spine side in a piano blanket. The lip of the lid pulled the lid hinge closest to the keys bending it and pulling the two screws that go down vertically into the rim. Movers had also "lost" all the leg and lyre screws and one of the lyre support rods. All new parts ordered from Yamaha . when I removed the bent hinge there was a crack in the middle piece of rim laminate between the screw holes. Fortunately there is no bulging or cracking of the inside rim veneer or the polyester finish. What would be the best glue to use to fill the crack with and insure the screws will hold the hinge in securely ? the screws that come with the hinges are not very long perhaps 5/16" - I was thinking some super thin CA would flow in easily but perhaps yellow carpenters glue is a better choice. Plan would be to pry away the crack a small amount, insert glue and clamp . I could also insert some shoe pegs into the screw holes to give the screws more bite ....

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James Kelly
Pawleys Island SC
843-325-4357
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I would vote water-thin epoxy, or Jim Coleman's CA glue, also thin. www.Colemantools.com. Wood Glue would also work, but hard to get it into a thin crack.
My $.02.
Paul McCloud
San Diego



Movers took a GP1 off the skid board and left the piano resting on the spine side in a piano blanket. The lip of the lid pulled the lid hinge closest to the keys bending it and pulling the two screws that go down vertically into the rim. Movers had also "lost" all the leg and lyre screws and one of the lyre support rods. All new parts ordered from Yamaha . when I removed the bent hinge there was a crack in the middle piece of rim laminate between the screw holes. Fortunately there is no bulging or cracking of the inside rim veneer or the polyester finish. What would be the best glue to use to fill the crack with and insure the screws will hold the hinge in securely ? the screws that come with the hinges are not very long perhaps 5/16" - I was thinking some super thin CA would flow in easily but perhaps yellow carpenters glue is a better choice. Plan would be to pry away the crack a small amount, insert glue and clamp . I could also insert some shoe pegs into the screw holes to give the screws more bite ....

------------------------------
James Kelly
Pawleys Island SC
843-325-4357



Original Message------

Movers took a GP1 off the skid board and left the piano resting on the spine side in a piano blanket. The lip of the lid pulled the lid hinge closest to the keys bending it and pulling the two screws that go down vertically into the rim. Movers had also "lost" all the leg and lyre screws and one of the lyre support rods. All new parts ordered from Yamaha . when I removed the bent hinge there was a crack in the middle piece of rim laminate between the screw holes. Fortunately there is no bulging or cracking of the inside rim veneer or the polyester finish. What would be the best glue to use to fill the crack with and insure the screws will hold the hinge in securely ? the screws that come with the hinges are not very long perhaps 5/16" - I was thinking some super thin CA would flow in easily but perhaps yellow carpenters glue is a better choice. Plan would be to pry away the crack a small amount, insert glue and clamp . I could also insert some shoe pegs into the screw holes to give the screws more bite ....

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James Kelly
Pawleys Island SC
843-325-4357
------------------------------

Epoxy for sure, IMHO. I'd use something like West System. If the crack isn't very wide, use it unthickened. I'd also use a slow hardener. Open the crack with a screwdriver or whatever to whatever extend you can. Apply epoxy and use tools to work it down the crack as much as possible - thin piece of plastic, music wire, etc. - whatever you can shove in there to work the epoxy as far down as possible. The slow hardener will help allow the epoxy to flow down in there as much as it can. If the crack is really small and you really need the thinest epoxy available, you might want to go with something like TotalBoat Penetrating Epoxy - it is thinner than West System.

Then clamp and wipe up squeeze-out. Clamping, opening the crack back up, applying more epoxy, working it down and then clamping again will also help the epoxy get as far down in the crack as is possible - if you feel the need.

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Terry Farrell
Farrell Piano Service, Inc.
Brandon, Florida
terry@farrellpiano.com
813-684-3505
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Original Message:
Sent: 10-12-2018 11:56
From: James Kelly
Subject: Glue Recommendation for Rim Crack-Yamaha GP1

Movers took a GP1 off the skid board and left the piano resting on the spine side in a piano blanket. The lip of the lid pulled the lid hinge closest to the keys bending it and pulling the two screws that go down vertically into the rim. Movers had also "lost" all the leg and lyre screws and one of the lyre support rods. All new parts ordered from Yamaha . when I removed the bent hinge there was a crack in the middle piece of rim laminate between the screw holes. Fortunately there is no bulging or cracking of the inside rim veneer or the polyester finish. What would be the best glue to use to fill the crack with and insure the screws will hold the hinge in securely ? the screws that come with the hinges are not very long perhaps 5/16" - I was thinking some super thin CA would flow in easily but perhaps yellow carpenters glue is a better choice. Plan would be to pry away the crack a small amount, insert glue and clamp . I could also insert some shoe pegs into the screw holes to give the screws more bite ....

------------------------------
James Kelly
Pawleys Island SC
843-325-4357
------------------------------

I agree with Terry, West Systems Epoxy. 

The only problem with West Systems is it has the compressive strength of steel. If you get the epoxy in the screw hole, the screw will drift into the softer material. Shoe pegs in the hole will work but centering the screws is still a problem.
On those short screws for the music desk, I would use a quick set wood colored epoxy and maple toothpicks. 
Then I soaked the screws in a mold release like McLube 444 and screwed the hinge on. The screw head has to have a good slot and your screw driver tip has to fit right because they snap when removing the screws. A tap on the end of the driver before turning will help the screw break loose. Even for those short screws on a music desk,, this is the most solid repair I could come up with. It is a winner.

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Keith Roberts
owner
Hathaway Pines CA
209-728-2163
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Original Message:
Sent: 10-13-2018 07:14
From: Terrence Farrell
Subject: Glue Recommendation for Rim Crack-Yamaha GP1

Epoxy for sure, IMHO. I'd use something like West System. If the crack isn't very wide, use it unthickened. I'd also use a slow hardener. Open the crack with a screwdriver or whatever to whatever extend you can. Apply epoxy and use tools to work it down the crack as much as possible - thin piece of plastic, music wire, etc. - whatever you can shove in there to work the epoxy as far down as possible. The slow hardener will help allow the epoxy to flow down in there as much as it can. If the crack is really small and you really need the thinest epoxy available, you might want to go with something like TotalBoat Penetrating Epoxy - it is thinner than West System.

Then clamp and wipe up squeeze-out. Clamping, opening the crack back up, applying more epoxy, working it down and then clamping again will also help the epoxy get as far down in the crack as is possible - if you feel the need.

------------------------------
Terry Farrell
Farrell Piano Service, Inc.
Brandon, Florida
terry@farrellpiano.com
813-684-3505

Original Message:
Sent: 10-12-2018 11:56
From: James Kelly
Subject: Glue Recommendation for Rim Crack-Yamaha GP1

Movers took a GP1 off the skid board and left the piano resting on the spine side in a piano blanket. The lip of the lid pulled the lid hinge closest to the keys bending it and pulling the two screws that go down vertically into the rim. Movers had also "lost" all the leg and lyre screws and one of the lyre support rods. All new parts ordered from Yamaha . when I removed the bent hinge there was a crack in the middle piece of rim laminate between the screw holes. Fortunately there is no bulging or cracking of the inside rim veneer or the polyester finish. What would be the best glue to use to fill the crack with and insure the screws will hold the hinge in securely ? the screws that come with the hinges are not very long perhaps 5/16" - I was thinking some super thin CA would flow in easily but perhaps yellow carpenters glue is a better choice. Plan would be to pry away the crack a small amount, insert glue and clamp . I could also insert some shoe pegs into the screw holes to give the screws more bite ....

------------------------------
James Kelly
Pawleys Island SC
843-325-4357
------------------------------