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Removing stuck pivot screws from posts

saxmad

Member
Messages
83
Locality
North Norfolk
I'm stripping down a Yanagisawa 900u tenor and numerous pivot screws are impossible to remove. The screw slots are fine and it appears that Yanagisawa possibly use a thread locker as they are ridiculously fast. One solution is to apply heat to the post after penetrating fluid has been applied but other suggestions would be welcomed.

This is the second Yanagisawa I have worked on and they both appear to have poor quality initial set ups - the first one had pads that weren't properly seating, and that was brand new!
 

HPS

Member
Messages
33
Locality
Scotland
Are you using a normal type screwdriver? A ratchet handle with an adaptor and bit set may give more leverage. Hopefully they won't snap!
 

Stephen Howard

Well-Known Member
Messages
3,358
Locality
UK
Heat is the key to releasing threadlocker. You shouldn't need any penetrating fluid.
If your driver blade is too chunky, (hollow) grind it down a little - but don't struggle on with a blade that's too thick.
 

PigSquealer

Connoisseur of applesauce
Café Supporter
Messages
1,153
Locality
Los Angeles
I have a stupid question. If you’re trying to extract a hinge rod you’re heating the opposite end. The post on the other end with the threads? On pivot screws I have a luck heating more directly on the head itself.
like Steve mentions. Penetrant has no effect on thread lockers.
 
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