Replacing a spring on a flute.

Here is my task: to replace the Upper C key spring on a student's flute.  First, I inspect

Next, I use the proper screwdriver to remove the upper C key hinge tube rod.  

Next, using my Spring Removal Plyers I grab the old spring a small distance away from the post.  I then use my Knipex Plyers(tapped with clear packing tape to prevent marring of the post in any way) to cradle the gripping Spring Removal Plyers and the post.  I exert inward pressure against the post and the gripping Spring Removal Plyers to push the existing spring through and out the opposite end of the post. 

Here you can hopefully see the old spring right side pushed through the post and ready to be completely passed through and extracted. 

Success!

Using my caliper, I measure to ensure that I use the correct wire gauge in the replacement.

Here is the new spring, measured, ready to be cut and crimped and fitted.

Using my Spring Removal Plyers, in introduce the new fitted spring to its new home in the post.

Pull it through.

Crimp it into place using my round nosed plyers.  These plyers are used here to avoid marring the finish on the post.

Replaced upper C key assembly and observed fit.

Viola!