[CAUT] Which side to yank the butterfly spring?

[Chris Solliday]

Hi Ed, 
I remember learning this at both Steinway and Yamaha. Then one day Wally Brooks told me, when I was complaining (again) that sometimes I couldn't get enough tension on old springs that way, that left side was correct until it doesn't work then if you try the right side you you might just get that extra needed. And that works sometimes too. I think it is probably more important to have correct pinning of the balancier and fly flanges and no kink in the spring except the ones in the fly hole and the curl in the grub.
Chris Solliday
  ----- Original Message ----- 
  From: Ed Sutton 
  To: College and University Technicians 
  Sent: Wednesday, September 17, 2008 10:17 PM
  Subject: [CAUT] Which side to yank the butterfly spring?


  I'm reconditioning a set of wippens, and have them off the stack. As I was cleaning gunk out of the rep lever groove and cleaning the spring tip, I looked under the lever, at the allignment of the spring coil, and it occured to me that when the spring is snapped out of the groove and over to the bass side of the lever, the coil can open easily when you yank on the tip of the spring to make it stronger. Snap it out to the treble side and it jams against the underside of the rep lever when you pull. 

  It seems to me this would be a good policy - snap the spring out to the bass side when adjusting spring tension. 

  I don't recall reading or being taught to do it this way. Have I missed something, or am I imagining that something insignificant really matters?

  Ed Sutton
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