I have no idea why I was stuck on thinking you saying Blades instead of Brake...... I reread the post and seen where you were cleaning debris from the deck pulleys and such........
Yeah - I had a problem about a year ago when the blade engagement switch melted down and left me scrambling for a fix. Was annoying then too. But this time it was just the seat switch which was loose and intermittently causing it to not work correctly. The issue was hard to diagnose at first since it was not predictable. Got lucky and saw it dangling when I pulled the seat forward.
The problem has been alleviated.
Now, I need to study how to replace some damaged blades and clean up the deck. Might also look at lubing or replacing bearings in the pulleys. But the rains need to stop first.
Thanks for the help!
RT