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My book says 50 nM ( = 36.87 lb-ft) in two places; screen shots attached.
View attachment 87972
Don't reduce for blue loctite and if you use red loctite, sell the bike if you have to take it apart again.
I might have a concern that oxidation will compromise that torque value.
Best to make sure washers, pulley face, internal/external threads are clean.